Toyota Avalon (XX50): Actuator Cut Circuit Stuck Off (P16B09F). Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D213). Engine Coolant Pump Circuit Short to Battery (P26CA12)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Actuator Cut Circuit Stuck Off (P16B09F). Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D213). Engine Coolant Pump Circuit Short to Battery (P26CA12)

Actuator Cut Circuit Stuck Off (P16B09F)

MONITOR DESCRIPTION

The ECM monitors the operation of the throttle actuator. When a malfunction is detected in the throttle actuator cut circuit immediately after the power switch is turned off, the ECM illuminates the MIL and stores a DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P16B09F	Actuator Cut Circuit Stuck Off	ECM main CPU malfunction (1 trip detection logic).	ECM	Comes on	DTC stored	SAE Code: P16B0

MONITOR STRATEGY

Related DTC	P16B0: ECM/PCM processor performance
Required Sensors/Components (Main)	ECM
Required Sensors/Components (Related)	-
Frequency of Operation	Once per driving cycle
Duration	-
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
Both of the following conditions are met	-
Power switch	On (IG) to off
EFI main relay	On

TYPICAL MALFUNCTION THRESHOLDS

Actuator cut circuit check

Fail

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the Techstream off.
Turn the power switch off.
Disconnect the Techstream.
Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
Connect the cable to the negative (-) auxiliary battery terminal.
Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Wait 1 second or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P16B09F.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

HINT:

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system is malfunctioning.
[A] to [B]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

NOTICE:

After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off.

2.	READ OUTPUT DTC (DTC P16B09F)

(a) Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

(d) Turn the Techstream on.

(e) Wait 1 second or more.

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

(g) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTC P16B09F is output	B

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D213)

DESCRIPTION

The D-4S system has two injection systems. One is an in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is an intake port injection system. The ECM determines the percentage of direct injection and port injection necessary in accordance with the engine speed and load.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P21CF13	Cylinder 1 Injector "B" Circuit Open	Open or short in port fuel injector assembly (1 trip detection logic).	Open or short in port fuel injector assembly circuit Port fuel injector assembly ECM	Comes on	DTC stored	SAE Code: P21CF
P21D013	Cylinder 2 Injector "B" Circuit Open	Open or short in port fuel injector assembly (1 trip detection logic).	Open or short in port fuel injector assembly circuit Port fuel injector assembly ECM	Comes on	DTC stored	SAE Code: P21D0
P21D113	Cylinder 3 Injector "B" Circuit Open	Open or short in port fuel injector assembly (1 trip detection logic).	Open or short in port fuel injector assembly circuit Port fuel injector assembly ECM	Comes on	DTC stored	SAE Code: P21D1
P21D213	Cylinder 4 Injector "B" Circuit Open	Open or short in port fuel injector assembly (1 trip detection logic).	Open or short in port fuel injector assembly circuit Port fuel injector assembly ECM	Comes on	DTC stored	SAE Code: P21D2

MONITOR DESCRIPTION

The ECM monitors the injection control of the port fuel injector assemblies. If a malfunction is detected in a port fuel injector assembly circuit, the ECM cancels the injection control for the corresponding cylinder, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P21CF: Port injector (cylinder 1) circuit/open P21D0: Port injector (cylinder 2) circuit/open P21D1: Port injector (cylinder 3) circuit/open P21D2: Port injector (cylinder 4) circuit/open
Required Sensors/Components (Main)	Port fuel injector assembly (cylinder 1 to 4)
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	-
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Auxiliary battery voltage	8 V or higher
Fuel cut	Off
Synchronous injection	Operating
Power switch	On (IG)
Either of the following conditions is met	Condition A or B
A. Engine	Running
B. Starter	On
Injection time	Higher than 0 seconds

TYPICAL MALFUNCTION THRESHOLDS

One of the following conditions is met	A, B or C
A. Both of the following conditions are met	10 times or more
Command to injector	Off
Injector voltage detected by injector driver IC	[Auxiliary battery voltage multiplied by 0.55] V or less
B. Both of the following conditions are met	10 times or more
Command to injector	Off
Injector voltage detected by injector driver IC	Higher than [auxiliary battery voltage multiplied by 0.55] V, and [auxiliary battery voltage multiplied by 0.7] V or less
C. One of the following conditions is met	(a), (b) or (c)
(a) Both of the following conditions are met	10 times or more
Command to injector	On
Injector voltage detected by injector driver IC	[Auxiliary battery voltage multiplied by 0.12] V or higher
(b) Both of the following conditions are met	10 times or more
Command to injector	On
Injector current detected by injector driver IC	2.6 A or higher
(c) Following condition is met	10 times or more
Injector driver IC internal temperature detected by injector driver IC	150°C (302°F) or higher

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine [A].
Idle the engine for 3 minutes or more [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P21CF13, P21D013, P21D113 or P21D213.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

HINT:

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system has a malfunction.
If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

PROCEDURE

1.	CHECK DTCS OUTPUT (IN ADDITION TO DTC P21CF13, P21D013, P21D113 OR P21D213)

(a) Connect the Techstream to the DLC3.

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

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

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P21CF13, P21D013, P21D113 or P21D213 is output	A
DTC P21CF13, P21D013, P21D113 and P21D213 are output	B

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 NO. 1 RELAY - PORT FUEL INJECTOR ASSEMBLY)

2.	CHECK TERMINAL VOLTAGE (POWER SOURCE OF PORT FUEL INJECTOR ASSEMBLY)

*a	Front view of wire harness connector (to Port Fuel Injector Assembly)

(a) Disconnect the port fuel injector assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
D1-1 (#1) - Body ground	Power switch on (IG)	11 to 14 V
D2-1 (#2) - Body ground	Power switch on (IG)	11 to 14 V
D3-1 (#3) - Body ground	Power switch on (IG)	11 to 14 V
D4-1 (#4) - Body ground	Power switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 NO. 1 RELAY - PORT FUEL INJECTOR ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (PORT FUEL INJECTOR ASSEMBLY - ECM)

(a) Disconnect the port fuel injector assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D1-2 (#10) - C55-76 (#10)	Always	Below 1 Ω
D2-2 (#20) - C55-75 (#20)	Always	Below 1 Ω
D3-2 (#30) - C55-74 (#30)	Always	Below 1 Ω
D4-2 (#40) - C55-73 (#40)	Always	Below 1 Ω
D1-2 (#10) or C55-76 (#10) - Body ground and other terminals	Always	10 kΩ or higher
D2-2 (#20) or C55-75 (#20) - Body ground and other terminals	Always	10 kΩ or higher
D3-2 (#30) or C55-74 (#30) - Body ground and other terminals	Always	10 kΩ or higher
D4-2 (#40) or C55-73 (#40) - Body ground and other terminals	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT PORT FUEL INJECTOR ASSEMBLY (RESISTANCE)

(a) Inspect the port fuel injector assembly.

Click here

HINT:

Perform "Inspection After Repair" after replacing the port fuel injector assembly.

Click here

REPLACE ECM

REPLACE PORT FUEL INJECTOR ASSEMBLY

Engine Coolant Pump Circuit Short to Battery (P26CA12)

DESCRIPTION

The ECM calculates the necessary cooling amount based on the engine coolant temperature, engine speed and vehicle speed, and controls the water inlet housing with water pump sub-assembly accordingly. The water inlet housing with water pump sub-assembly controls the speed of the water inlet housing with water pump sub-assembly steplessly and optimally based on a duty cycle signal sent by the ECM, which reduces engine warm-up time, improves fuel efficiency and reduces cooling loss.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P26CA12	Engine Coolant Pump Circuit Short to Battery	The operation duty ratio signal (WPO) of the water inlet housing with water pump sub-assembly is a certain value or more when the water inlet housing with water pump sub-assembly operation signal is being output (1 trip detection logic).	Short in water inlet housing with water pump sub-assembly circuit Water inlet housing with water pump sub-assembly ECM	Comes on	DTC stored	SAE Code: P26CD

Related Data List

DTC No.	Data List
P26CA12	Coolant Temperature Electric Water Pump Target Speed Electric Water Pump Speed

MONITOR DESCRIPTION

The ECM outputs an operation duty signal (WPO) to steplessly control the speed of the water inlet housing with water pump sub-assembly. The ECM outputs an operation duty signal (WPO) to the water inlet housing with water pump sub-assembly and monitors the actual duty signal (WPO) being output. When the actual operation duty signal (WPO) exceeds a certain value when outputting an operation duty signal (WPO) to the water inlet housing with water pump sub-assembly, the ECM detects a malfunction and stores a DTC.

MONITOR STRATEGY

Related DTCs	P26CD: Engine water pump circuit range check (High voltage)
Required Sensors/Components (Main)	Water inlet housing with water pump sub-assembly
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	3 seconds
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

All of the following conditions are met	-
Auxiliary battery voltage	8 V or higher
Power switch	On (IG)
Time after power switch off to on (IG)	0.5 seconds or more
Output duty cycle	30 to 85%
Engine water pump circuit pulse input fail (P26CA)	Not detected

TYPICAL MALFUNCTION THRESHOLDS

Both of the following conditions are met	-
Water inlet housing with water pump sub-assembly output terminal voltage level	High
Water inlet housing with water pump sub-assembly output signal	No signal

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) [A].
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and maintain the engine speed at 2500 rpm or more for at least 40 seconds [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P26CA12.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

HINT:

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system has a malfunction.
If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

PROCEDURE

1.	CHECK TERMINAL VOLTAGE (POWER SOURCE OF WATER INLET HOUSING WITH WATER PUMP SUB-ASSEMBLY)

*a	Front view of wire harness connector (to Water Inlet Housing with Water Pump Sub-assembly)

(a) Disconnect the water inlet housing with water pump sub-assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
C39-2 (SWP) - Body ground	Power switch on (IG)	Below 1 V

GO TO STEP 3

2.	INSPECT ECM (INTERNAL CIRCUIT)

*a	Front view of wire harness connector (to Water Inlet Housing with Water Pump Sub-assembly)

(a) Disconnect the water inlet housing with water pump sub-assembly connector.

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

Standard:

Tester Connection	Condition	Specified Condition
C39-2 (SWP) - Body ground	Power switch on (IG)	Resistance fluctuates*

HINT:

*: When the connector of the water inlet housing with water pump sub-assembly is disconnected, the ECM will enter fail-safe mode. In this case, duty control of the transistors in the ECM will be performed and resistance fluctuates.
If the resistance fluctuates while the ECM is in fail-safe mode after the connector of the water inlet housing with water pump sub-assembly is disconnected, it can be determined that the transistor is operating.
If the transistor does not operate, the ECM may be malfunctioning.
If the resistance fluctuates after turning the power switch on (IG), it can be determined that the ECM is in fail-safe mode.

REPLACE WATER INLET HOUSING WITH WATER PUMP SUB-ASSEMBLY

REPLACE ECM

3.	CHECK HARNESS AND CONNECTOR (WATER INLET HOUSING WITH WATER PUMP SUB-ASSEMBLY - ECM)

(a) Disconnect the water inlet housing with water pump sub-assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C39-2 (SWP) or C55-50 (WPO) - Other terminals	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 (P014C00,P014D00,P015A00,P015B00)

Engine Coolant Pump Circuit Short to Ground or Open (P26CA14). Engine Coolant Pump No Signal (P26CA31). Engine Coolant Pump Actuator Stuck (P26CB71)

See More:

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