Toyota Avalon (XX50): Fail-safe Chart. Freeze Frame Data. Fuel Pump Control Circuit

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / Fail-safe Chart. Freeze Frame Data. Fuel Pump Control Circuit

Fail-safe Chart

FAIL-SAFE CHART

If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.

DTC Code

Component

Fail-Safe Operation

Fail-Safe Deactivation Condition

P001100

P001107

P001500

P002100

P002107

P002500

VVT system

  • Idle up (control of combustion worsening).
  • Stopping fuel-cut control.

Pass condition detected

P003012

P003013

P005012

P005013

P101A9E

P103A9E

Air fuel ratio sensor heater

The ECM turns off the air fuel ratio sensor heater.

Engine switch off

P003612

P003614

P005612

P005614

P102A9E

P105A9E

Heated oxygen sensor heater

The ECM turns off the heated oxygen sensor heater.

Engine switch off

P008700

P008800

P123513

Fuel pump assembly (for high pressure side)

  • The ECM performs fuel-cut when the engine speed and engine load are high.
  • Fuel pressure is set to 200 kPa.

Engine switch off

P010012

P010014

Mass air flow meter sub-assembly

The ECM calculates fuel injection volume according to the engine speed and throttle valve position.

Pass condition detected

P011011

P011015

Intake air temperature sensor

The ECM estimates the intake air temperature to be 20°C (68°F).

Pass condition detected and then engine switch turned off

P011511

P011515

Engine coolant temperature sensor

The ECM estimates the engine coolant temperature to be 80°C (176°F).

Pass condition detected

P012011

P012015

P01201C

P022011

P022015

P060444

P060604

P060629

P060647

P060A47

P060B49

P060D49

P060E49

P061E49

P065714

P06579E

P160700

P210014

P210015

P211172

P211173

P211900

P211904

P211977

P21352B

Electronic throttle control system

The ECM cuts off throttle actuator current and the throttle valve is returned to a 7° throttle position by the return spring.

The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal angle to allow the vehicle to be driven at a low speed*1.

Pass condition detected and then engine switch turned off

P019011

P019015

Fuel pressure sensor (for high pressure)

  • The ECM performs fuel-cut when the engine speed and engine load are high.
  • Fuel pressure is set to 200 kPa.

Pass condition detected and then engine switch turned off

P020113

P020213

P020313

P020413

P020513

P020613

P062D13

ECM (injector driver)

The ECM performs fuel-cut when the engine speed is 2500 rpm or more.

Pass condition detected and then engine switch turned off

P030000

P030027

P030085

P030100

P030200

P030300

P030400

P030500

P030600

*2

  • Fuel injector assembly
  • Electronic throttle control system

When a catalyst-damaging misfire occurs (MIL blinking), the following fail-safe operation is performed for catalyst overheat malfunction prevention.

  1. Under a low load and at a low engine speed:

    - Fuel cut is performed on the malfunctioning cylinder.

  2. Under a high load and at a high engine speed:

    - Throttle valve opening angle control is performed.

    - Fuel cut is performed on all cylinders or the malfunctioning cylinder.

Pass condition detected and then engine switch turned off

P032511

P032515

P033011

P033015

Knock control sensor

The ECM sets the ignition timing to maximum retard.

Engine switch off

P035113

P035213

P035313

P035413

P035513

P035613

Ignition coil assembly

The ECM cuts the fuel injection.

Pass condition detected

P05042B

Stop light switch assembly

The accelerator pedal opening angle is fixed when there is an accelerator pedal malfunction or history of a malfunction.

Pass condition detected and then engine switch turned off

P056014

ECM +B circuit

Generator command is maintained.

Pass condition detected and then engine switch turned off

P107A11

P107A15

Fuel pressure sensor (for low pressure side)

  • Fuel pump (for low pressure side) control is maintained.
  • Output is limited.

Pass condition detected and then engine switch turned off

P21CF13

P21D013

P21D113

P21D213

P21D313

P21D413

Fuel injector assembly (for port injection)

The ECM performs fuel-cut when the engine speed is 2500 rpm or more.

Pass condition detected and then engine switch turned off

P212012

P212014

P21201C

P21201F

P212099

P212512

P212514

P21251F

P21382B

Accelerator pedal position sensor

The accelerator pedal position sensor has 2 sensor circuits: Main and Sub.

If either circuit malfunctions, the ECM limits the engine output.

If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

Pass condition detected and then engine switch turned off

P223711

P223712

P223713

P223716

P223717

P22371B

P224011

P224012

P224013

P224016

P224017

P22401B

P225111

P225112

P225411

P225412

Air fuel ratio sensor

Air fuel ratio feedback control is stopped

Pass condition detected and then engine switch turned off

HINT:

  • *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
  • *2: Misfire-related fail-safe operations occur when catalyst overheat malfunctions occur.

Freeze Frame Data

FREEZE FRAME DATA

DESCRIPTION

The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT:

  • If it is impossible to replicate the problem even though a DTC is detected, confirm the freeze frame data.
  • Freeze frame data is available in long and short forms.

PENDING FREEZE FRAME DATA

HINT:

Pending freeze frame data is stored when a 2 trip DTC is first detected during the first trip.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Select a DTC in order to display its pending freeze frame data.

Powertrain > Engine > Trouble Codes

HINT:

  • Pending freeze frame data is cleared when any of the following occurs.
    • Using the Techstream, the DTCs cleared.
    • The cable is disconnected from the negative (-) battery terminal.
    • 40 trips with the engine fully warmed up have been performed after returning to normal. (Pending freeze frame data will not be cleared by only returning the system to normal.)
  • With previous pending freeze frame data stored, if pending freeze frame data is newly stored when a 2 trip DTC is detected in the first trip, the old freeze frame data will be replaced with the new data of the newly detected DTC in the next trip.

LIST OF FREEZE FRAME DATA

Powertrain > Engine

Tester Display

Total Distance Traveled

Total Distance Traveled - Unit

Vehicle Speed

Engine Speed

Calculate Load

Vehicle Load

Mass Air Flow Sensor

Atmospheric Pressure

Coolant Temperature

Intake Air Temperature

Ambient Temperature

Engine Run Time

IG-ON Coolant Temperature

Initial Engine Coolant Temperature

IG-ON Intake Air Temperature

Initial Engine Intake Air Temperature

Battery Voltage

BATT Voltage

Glow Indicator Supported

Accelerator Position

Accelerator Position Sensor No.1 Voltage %

Accelerator Position Sensor No.2 Voltage %

Accelerator Position Sensor No.1 Voltage

Accelerator Position Sensor No.2 Voltage

Accelerator Idle Position

Accelerator Position Sensor No.1 Fully Closed Learn Value

Accelerator Position Sensor No.2 Fully Closed Learn Value

Engine Starting Torque Control Count

Throttle Position Sensor No.1 Voltage %

Throttle Position Sensor No.2 Voltage %

System Guard

Open Side Malfunction

Throttle Request Position

Throttle Sensor Position

Throttle Position Sensor No.1 Voltage

Throttle Position Sensor No.2 Voltage

Throttle Position Command

Throttle Position Sensor Open Position No.1

Throttle Position Sensor Open Position No.2

Throttle Motor Current

Throttle Motor Duty Ratio

Throttle Motor Duty Ratio (Open)

Throttle Motor Duty Ratio (Close)

Throttle Position Sensor Fully Closed Learn Value

+BM Voltage

Actuator Power Supply

Throttle Air Flow Learn Value (Area 1)

Throttle Air Flow Learn Value (Area 2)

Throttle Air Flow Learn Value (Area 3)

Throttle Air Flow Learn Value (Calculated Value)

Throttle Air Flow Learn Value (Atmosphere Pressure Offset Value)

Low Revolution Control

N Range Status

Engine Stall Control F/B Flow

ISC F/B Learn Torque

ISC Total AUXS Torque

ISC F/B Torque

Sum of ISC F/B Torque (Recent)

ISC AUXS Torque (Alternator)

ISC AUXS Torque (Air Conditioner)

Throttle Air Flow F/B Value

Throttle Position

Target Fuel Pressure (High)

Target Fuel Pressure (High) Supported

Target Fuel Pressure (Low)

Target Fuel Pressure (Low) Supported

Fuel Pressure (High)

Fuel Pressure (High) Supported

Fuel Pressure (Low)

Fuel Pressure (Low) Supported

VSV for Vent Valve

Vacuum Pump

Fuel Pump Control Duty Ratio

Injector Cylinder #1 (Port)

Injection Volume Cylinder #1

Target Fuel Pressure Offset

Injection Volume

Low Fuel Pressure Sensor

High Fuel Pressure Sensor

High Pressure Fuel Pump Duty Ratio (D4)

High Pressure Fuel Pump Discharge Rate

Injection Mode

Injection Switching Status

Injection Timing Cylinder #1 (D4)

Injection Time Cylinder #1 (D4)

Current Fuel Type

EVAP (Purge) VSV

Target Air-Fuel Ratio

A/F (O2) Lambda Sensor B1S1

A/F (O2) Lambda Sensor B2S1

A/F (O2) Sensor Voltage B1S1

A/F (O2) Sensor Voltage B2S1

A/F (O2) Sensor Current B1S1

A/F (O2) Sensor Current B2S1

A/F (O2) Sensor Heater Duty Ratio B1S1

A/F (O2) Sensor Heater Duty Ratio B2S1

O2 Sensor Voltage B1S2

O2 Sensor Voltage B2S2

O2 Sensor Impedance B1S2

O2 Sensor Impedance B2S2

O2 Sensor Heater B1S2

O2 Sensor Heater B2S2

O2 Sensor Heater Current Value B1S2

O2 Sensor Heater Current Value B2S2

Short FT B1S1

Short FT B2S1

Short FT B1S2

Short FT B2S2

Long FT B1S1

Long FT B2S1

Long FT B1S2

Long FT B2S2

Total FT Bank 1

Total FT Bank 2

Fuel System Status Bank 1

Fuel System Status Bank 2

Ignition Timing Cylinder #1

Knock F/B Value

Knock Correct Learn Value

Idle Spark Advance Control Cylinder #1

Idle Spark Advance Control Cylinder #2

Idle Spark Advance Control Cylinder #3

Idle Spark Advance Control Cylinder #4

Idle Spark Advance Control Cylinder #5

Idle Spark Advance Control Cylinder #6

Mass Air Flow Circuit

ACIS VSV

VVT Advance Fail

Intake VVT Hold Correct Learn Value Bank 1 (Area 1)

Intake VVT Hold Correct Learn Value Bank 1 (Area 2)

Intake VVT Hold Correct Learn Value Bank 2 (Area 1)

Intake VVT Hold Correct Learn Value Bank 2 (Area 2)

Intake VVT Change Angle Bank 1

Intake VVT Change Angle Bank 2

Intake VVT OCV Control Duty Ratio Bank 1

Intake VVT OCV Control Duty Ratio Bank 2

Exhaust VVT Hold Learn Value Bank 1

Exhaust VVT Hold Learn Value Bank 2

Exhaust VVT Change Angle Bank 1

Exhaust VVT Change Angle Bank 2

Exhaust VVT OCV Control Duty Ratio Bank 1

Exhaust VVT OCV Control Duty Ratio Bank 2

Intake VVT Target Angle Bank 1

Intake VVT Target Angle Bank 2

Exhaust VVT Target Angle Bank 1

Exhaust VVT Target Angle Bank 2

Catalyst Temperature B1S1

Catalyst Temperature B2S1

Catalyst Temperature B1S2

Catalyst Temperature B2S2

Starter SW

Neutral Position SW

Stop Light SW

Immobiliser Communication

Cruise Main SW

Closed Throttle Position SW

TC Terminal

MIL ON Run Distance

Running Time from MIL ON

Time after DTC Cleared

Distance from DTC Cleared

Warmup Cycle Cleared DTC

Distance Traveled from Last Battery Cable Disconnect

IG OFF Elapsed Time

Soak IC Current Timer Value

Soak IC First Start Time

Soak Timer Start History

Ignition Trigger Count

Misfire Count Cylinder #1

Misfire Count Cylinder #2

Misfire Count Cylinder #3

Misfire Count Cylinder #4

Misfire Count Cylinder #5

Misfire Count Cylinder #6

All Cylinders Misfire Count

Misfire RPM

Misfire Load

Misfire Margin

Catalyst OT Misfire Fuel Cut

Catalyst OT Misfire Fuel Cut History

Catalyst OT Misfire Fuel Cut Cylinder #1

Catalyst OT Misfire Fuel Cut Cylinder #2

Catalyst OT Misfire Fuel Cut Cylinder #3

Catalyst OT Misfire Fuel Cut Cylinder #4

Catalyst OT Misfire Fuel Cut Cylinder #6

Catalyst OT Misfire Fuel Cut Cylinder #5

Engine Speed (Starter Off)

Starter Count

Run Distance of Previous Trip

Engine Starting Time

Engine Start Hesitation

Low Revolution for Engine Start

Fuel Cut Elapsed Time

Previous Trip Coolant Temp

Previous Trip Intake Temp

Engine Oil Temperature

Previous Trip Eng Oil Temp

Ambient Temp for A/C

Previous Trip Ambient Temp

A/F Learn Value Idle Bank 1

A/F Learn Value Idle Bank 2

A/F Learn Value Low Bank 1

A/F Learn Value Low Bank 2

A/F Learn Value Mid No.1 Bank 1

A/F Learn Value Mid No.1 Bank 2

A/F Learn Value Mid No.2 Bank 1

A/F Learn Value Mid No.2 Bank 2

A/F Learn Value High Bank 1

A/F Learn Value High Bank 2

A/F Learn Value Low (Dual) Bank 1

A/F Learn Value Low (Dual) Bank 2

A/F Learn Value Mid (Dual) No.1 Bank 1

A/F Learn Value Mid (Dual) No.1 Bank 2

A/F Learn Value Mid (Dual) No.2 Bank 1

A/F Learn Value Mid (Dual) No.2 Bank 2

A/F Learn Value High (Dual) Bank 1

A/F Learn Value High (Dual) Bank 2

Compression Leakage Count

Rough Idle Status

Plural Cylinders Rough Idle

Rough Idle Cylinder #1

Rough Idle Cylinder #2

Rough Idle Cylinder #3

Rough Idle Cylinder #4

Rough Idle Cylinder #5

Rough Idle Cylinder #6

Alternator Output Duty Ratio

Alternator Voltage - Non Active Test

Voltage of Alternator

ACM Inhibit

Cooling Fan Duty Ratio

Brake Override System

Immobiliser Fuel Cut Status

Immobiliser Fuel Cut History

Key Unlock Signal

Engine Speed Cylinder #1

Engine Speed Cylinder #2

Engine Speed Cylinder #3

Engine Speed Cylinder #4

Engine Speed Cylinder #5

Engine Speed Cylinder #6

Average Engine Speed of All Cylinder

A/F Sensor Determination (Worst Value) Bank 1

A/F Sensor Determination (Worst Value) Bank 2

Engine Speed Fluctuation Average (Worst Value) Cylinder #1

Engine Speed Fluctuation Average (Worst Value) Cylinder #2

Engine Speed Fluctuation Average (Worst Value) Cylinder #3

Engine Speed Fluctuation Average (Worst Value) Cylinder #4

Engine Speed Fluctuation Average (Worst Value) Cylinder #5

Engine Speed Fluctuation Average (Worst Value) Cylinder #6

A/F Sensor Determination (Worst Value) (Port) Bank 1

A/F Sensor Determination (Worst Value) (Port) Bank 2

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #1

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #2

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #3

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #4

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #5

Engine Speed Fluctuation Average (Worst Value) (Port) Cylinder #6

Received MIL from ECT

Output Axis Speed

NT Sensor Speed

Shift SW Status (P Range)

Shift SW Status (R Range)

Shift SW Status (N Range)

Shift SW Status (N,P Range)

Sport Shift Up SW

Sport Shift Down SW

Shift SW Status (S Range)

Shift SW Status (D Range)

A/T Oil Temperature No.1

Drive Mode Status

Mode Cancel SW

Power Mode SW

Lock Up Status

Shift Status

Fuel Pump Control Circuit

DESCRIPTION

The fuel pump (for low pressure side) circuit consists of the ECM, fuel pump (for low pressure side) and fuel pump control ECU (which operates the fuel pump (for low pressure side)). Based on the engine output, the ECM determines the fuel pump speed. The speed is then converted to a duty signal and sent to the fuel pump control ECU. Based on the signal sent from the ECM, the fuel pump control ECU adjusts the fuel pump (for low pressure side) operation speed.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

INSPECT FUEL PUMP CONTROL ECU

*1

Fuel Pump Control ECU

-

-

(a) Remove the fuel pump control ECU.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

K15-1 (+B) - K15-3 (GND)

Always

200 Ω or higher

K15-1 (+B) - K15-2 (FPC)

Always

2 kΩ or higher

K15-2 (FPC) - K15-3 (GND)

Always

10 kΩ or higher

K14-1 (FPG) - K15-3 (GND)

Always

1 kΩ or higher

K14-2 (FPU) - K15-3 (GND)

Always

2 kΩ or higher

K14-3 (FPV) - K15-3 (GND)

Always

2 kΩ or higher

K14-4 (FPW) - K15-3 (GND)

Always

2 kΩ or higher

HINT:

This procedure checks for an internal short of the fuel pump control ECU when its transistor is stuck on.

NG

REPLACE FUEL PUMP CONTROL ECU

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE OF FUEL PUMP CONTROL ECU)

*a

Front view of wire harness connector

(to Fuel Pump Control ECU)

(a) Disconnect the fuel pump control ECU connector.

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

K15-1 (+B) - K15-3 (GND)

Engine switch on (IG)

11 to 14 V

HINT:

Make a note of the measured voltage as it may be used in a following Active Test.

NG

GO TO STEP 7

OK

3.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)

(a) Disconnect the fuel pump control ECU assembly connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

K15-2 (FPC) - A18-18 (FPC)

Always

Below 1 Ω

K15-2 (FPC) or A18-18 (FPC) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

PERFORM ACTIVE TEST USING TECHSTREAM (FUEL PUMP SINGLE PHASE ENERGIZATION)

*1

Fuel Pump Control ECU

-

-

(a) Disconnect the K14 fuel pump control ECU connector.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Fuel Pump Single Phase Energization.

Powertrain > Engine > Active Test

Tester Display

Fuel Pump Single Phase Energization

(f) Operate the fuel pump control ECU using the Active Test function and measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Techstream Operation

Specified Condition

K14-2 (FPU) - Body ground

U Phase

4.4 to 8.4 V*

K14-3 (FPV) - Body ground

V Phase

4.4 to 8.4 V*

K14-4 (FPW) - Body ground

W Phase

4.4 to 8.4 V*

HINT:

  • *: This Active Test restricts the fuel pump control ECU assembly output duty cycle to 50%. Therefore, the output voltage of the fuel pump control ECU assembly will be approximately 50% of the power source voltage measured in a previous step.
  • Before performing this inspection, check that the battery voltage is between 11 and 14 V (not depleted).

Result

Proceed to

The U phase, V phase and W phase are all normal

A

The U phase, V phase or W phase is abnormal

B

The U phase, V phase and W phase are all abnormal

C

B

REPLACE FUEL PUMP CONTROL ECU

C

GO TO STEP 6

A

5.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - FUEL PUMP (FOR LOW PRESSURE SIDE))

(a) Disconnect the fuel pump control ECU connector.

(b) Disconnect the fuel pump (for low pressure side) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

K14-2 (FPU) - K37-3 (BLPU)

Always

Below 1 Ω

K14-3 (FPV) - K37-4 (BLPV)

Always

Below 1 Ω

K14-4 (FPW) - K37-2 (BLPW)

Always

Below 1 Ω

K14-2 (FPU) or K37-3 (BLPU) - Body ground and other terminals

Always

10 kΩ or higher

K14-3 (FPV) or K37-4 (BLPV) - Body ground and other terminals

Always

10 kΩ or higher

K14-4 (FPW) or K37-2 (BLPW) - Body ground and other terminals

Always

10 kΩ or higher

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

Click here

OK

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

INSPECT ECM (FPC TERMINAL)

*a

Front view of wire harness connector

(to Fuel Pump Control ECU)

(a) Disconnect the fuel pump control ECU connector.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Fuel Pump Single Phase Energization.

Powertrain > Engine > Active Test

Tester Display

Fuel Pump Single Phase Energization

(f) Operate the fuel pump control ECU using the Active Test function and measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Techstream Operation

Specified Condition

K15-2 (FPC) - Body ground

Before Active Test → During Active Test

Before Active Test: Resistance is stable → During Active Test: Resistance fluctuates*

HINT:

*: Using the Active Test, duty control of the transistors in the ECM will be performed. Due to the duty control, resistance of the FPC terminal will be unstable during the Active Test. If the resistance is stable before the Active Test and fluctuates while performing the Active Test, it can be determined that the transistor is operating. If the transistor does not operate during the Active Test, the ECM may be malfunctioning.

OK

REPLACE FUEL PUMP CONTROL ECU

NG

REPLACE ECM

7.

CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE OF EFI-MAIN NO. 2 RELAY)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

3 (EFI-MAIN NO. 2 relay) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI-MAIN NO. 2 RELAY)

OK

8.

INSPECT EFI-MAIN NO. 2 RELAY

(a) Inspect the EFI-MAIN NO. 2 relay.

Click here

NG

REPLACE EFI-MAIN NO. 2 RELAY

OK

9.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - ECM)

(a) Remove the EFI-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (EFI-MAIN NO. 1 relay) - A18-46 (MREL)

Always

Below 1 Ω

2 (EFI-MAIN NO. 1 relay) or A18-46 (MREL) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 2 RELAY)

(a) Remove the EFI-MAIN NO. 1 and EFI-MAIN NO. 2 relays from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (EFI-MAIN NO. 1 relay) - 2 (EFI-MAIN NO. 2 relay)

Always

Below 1 Ω

5 (EFI-MAIN NO. 1 relay) or 2 (EFI-MAIN NO. 2 relay) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - BODY GROUND)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (EFI-MAIN NO. 2 relay) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - FUEL PUMP CONTROL ECU)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the fuel pump control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (EFI-MAIN NO. 2 relay) - K15-1 (+B)

Always

Below 1 Ω

5 (EFI-MAIN NO. 2 relay) or K15-1 (+B) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.

CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - BODY GROUND)

(a) Disconnect the fuel pump control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

K15-3 (GND) - Body ground

Always

Below 1 Ω

OK

GO TO ECM POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

EVAP System

How To Proceed With Troubleshooting. Initialization. Lack of Power

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Evaporative Emission System Leak Detected (Large Leak) (P045500,P045600). Fuel Level Sensor "A" Circuit Short to Battery (P046012,P046014). Vehicle Speed Sensor "A" No Signal (P050031)
Evaporative Emission System Leak Detected (Large Leak) (P045500,P045600) DTC SUMMARY DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P045500 Evaporative Emission System Leak Detected (Large Leak) Leak detection pump creates negative pressure (vacuum) in EVAP system and EV ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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