DTC SUMMARY MALFUNCTION DESCRIPTION These
DTCs indicate that the boost converter temperature sensor (lower) value
is abnormal. The cause of this malfunction may be one of the following: DESCRIPTION The
motor generator control ECU, which is built into in the inverter with
converter assembly, detects the temperature of the boost converter using
a temperature sensor built into the boost converter. If necessary, the
motor generator control ECU will limit inverter output to help prevent
the boost converter from overheating. The motor generator control ECU
also detects malfunctions in the sensor based on the temperature sensor
values. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0C3D1C DC/DC Converter Temperature Sensor "B" Circuit Voltage Out of Range The
actual boost converter temperature (lower) high and the difference
between the estimated boost converter temperature (lower) and the actual
temperature exceeds a threshold for 10 seconds, or after a long soak,
the boost converter temperature (lower) sensor value differs from the
values of other sensors. (1 trip detection logic) Comes on Master Warning Light: Comes on DTC No. Data List P0C3D1C MONITOR DESCRIPTION If
the motor generator control ECU detects a malfunction of the DC/DC
Converter Temperature Sensor "B" , it will illuminate the MIL and store a
DTC. MONITOR STRATEGY Related DTCs P0C3E (INF P0C3D1C): DC/DC Converter Temperature Sensor "B" Range / Performance Required sensors/components Inverter, boost converter Frequency of operation Continuous Duration TMC's intellectual property MIL operation 1 driving cycle Sequence of operation None TYPICAL ENABLING CONDITIONS The monitor will run whenever the following DTCs are not stored TMC's intellectual property Other conditions belong to TMC's intellectual property - TYPICAL MALFUNCTION THRESHOLDS TMC's intellectual property - COMPONENT OPERATING RANGE Motor generator control ECU DTC P0C3E (INF P0C3D1C) is not detected CONFIRMATION DRIVING PATTERN HINT: Click here Click here NOTICE: Make sure that the temperature of the inverter coolant do not drop below 15°C (59°F). HINT: It is possible to turn the power switch on (READY) without turning it on (IG) first. HINT: [*1] to [*6]: Normal judgment procedure. The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs. HINT: WIRING DIAGRAM Refer to the wiring diagram for the Cooling System. Click here CAUTION / NOTICE / HINT CAUTION: Click here HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. *a Without waiting for 10 minutes NOTICE: After
turning the 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 PROCEDURE 1. CHECK DTC OUTPUT (HYBRID CONTROL) (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. (d) Check for DTCs. Result Proceed to P0C3D1C only is output, or DTCs except the ones in the table below are also output. A Any of the following DTCs are also output. B Malfunction Content Relevant DTC Insulation Malfunction P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure Malfunction Content Relevant DTC Sensor and actuator circuit malfunction P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure P314A31 Motor Electronics Coolant Pump "A" No Signal System malfunction P0A9300 Inverter "A" Cooling System HINT: P0C3D1C may be output as a result of the malfunction indicated by the DTCs above. (e) Turn the power switch off. GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) Click here Result Proceed to OK A NG (The connector is not connected securely.) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C CONNECT SECURELY REPAIR OR REPLACE HARNESS OR CONNECTOR 3. CHECK COOLING SYSTEM Click here
HINT: If the "Cooling System" inspection results are normal, perform the next step. REPLACE INVERTER WITH CONVERTER ASSEMBLY DTC SUMMARY MALFUNCTION DESCRIPTION These
DTCs indicate that the boost converter temperature sensor (upper) value
is abnormal. The cause of this malfunction may be one of the following: DESCRIPTION The
motor generator control ECU, which is built into in the inverter with
converter assembly, detects the temperature of the boost converter using
the temperature sensor built into the boost converter. If necessary,
the motor generator control ECU will limit inverter output to help
prevent boost converter overheating. The motor generator control ECU
also detects malfunctions in the sensor based on the temperature sensor
values. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0C381C DC/DC Converter Temperature Sensor "A" Circuit Voltage Out of Range The
actual boost converter temperature (upper) high and the difference
between the estimated boost converter temperature (upper) and the actual
temperature exceeds a threshold for 10 seconds, or after a long soak,
the boost converter temperature (upper) sensor value differs from the
values of other sensors. (1 trip detection logic) Comes on Master Warning Light: Comes on DTC No. Data List P0C381C MONITOR DESCRIPTION If
the motor generator control ECU detects a malfunction of the DC/DC
Converter Temperature sensor "A", it will illuminate the MIL and store a
DTC. MONITOR STRATEGY Related DTCs P0C39 (INF P0C381C): DC/DC Converter Temperature Sensor "A" Range / Performance Required sensors/components Inverter, boost converter Frequency of operation Continuous Duration TMC's intellectual property MIL operation 1 driving cycle Sequence of operation None TYPICAL ENABLING CONDITIONS The monitor will run whenever the following DTCs are not stored TMC's intellectual property Other conditions belong to TMC's intellectual property - TYPICAL MALFUNCTION THRESHOLDS TMC's intellectual property - COMPONENT OPERATING RANGE Motor generator control ECU DTC P0C39 (INF P0C381C) is not detected CONFIRMATION DRIVING PATTERN HINT: Click here Click here NOTICE: Make sure that the temperature of the inverter coolant do not drop below 15°C (59°F). HINT: It is possible to turn the power switch on (READY) without turning it on (IG) first. HINT: [*1] to [*6]: Normal judgment procedure. The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs. HINT: WIRING DIAGRAM Refer to the wiring diagram for the Cooling System. Click here CAUTION / NOTICE / HINT CAUTION: Click here HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. *a Without waiting for 10 minutes NOTICE: After
turning the 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 PROCEDURE 1. CHECK DTC OUTPUT (HYBRID CONTROL) (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. (d) Check for DTCs. Result Proceed to P0C381C only is output, or DTCs except the ones in the table below are also output. A Any of the following DTCs are also output. B Malfunction Content Relevant DTC Insulation Malfunction P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure Malfunction Content Relevant DTC Sensor and actuator circuit malfunction P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure P314A31 Motor Electronics Coolant Pump "A" No Signal System malfunction P0A9300 Inverter "A" Cooling System HINT: (e) Turn the power switch off. GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) Click here Result Proceed to OK A NG (The connector is not connected securely.) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C CONNECT SECURELY REPAIR OR REPLACE HARNESS OR CONNECTOR 3. CHECK COOLING SYSTEM Click here
HINT: If the "Cooling System" inspection results are normal, perform the next step. REPLACE INVERTER WITH CONVERTER ASSEMBLY DTC SUMMARY MALFUNCTION DESCRIPTION This
DTC indicates that the motor torque execution value does not correspond
to the torque command value sent from the hybrid vehicle control ECU to
the motor (MG2). The cause of this malfunction may be one of the
following: Area Main Malfunction Description Inside of inverter Inverter with converter assembly internal circuit malfunction Hybrid vehicle transaxle assembly Motor cable (for MG2) Inverter low-voltage circuit The connectors are not connected properly Hybrid vehicle control ECU Hybrid vehicle control ECU internal circuit malfunction DESCRIPTION For a description of the inverter. Click here
A DTC is stored when the actual motor torque deviates from the motor torque requested by the hybrid vehicle control ECU. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0C1900 Drive Motor "A" Execution Torque Performance Motor (MG2) torque execution monitoring malfunction: The difference between the motor torque requested by the motor generator control ECU and actual motor torque is large. (1 trip detection logic) Comes on Master Warning Light: Comes on DTC No. Data List P0C1900 MONITOR DESCRIPTION If
the difference between the requested motor torque and the actual motor
(MG2) torque exceeds a predetermined value, the motor generator control
ECU determines that there is a malfunction in the execution or
monitoring of the motor (MG2) torque. Then, the motor generator control
ECU will illuminate the MIL and store a DTC. MONITOR STRATEGY Related DTCs P0C19 (INF P0C1900): Discrepancy between motor monitored torque and commanded torque Required sensors/components Motor inverter Frequency of operation Continuous Duration TMC's intellectual property MIL operation 1 driving cycle Sequence of operation None TYPICAL ENABLING CONDITIONS The monitor will run whenever the following DTCs are not stored TMC's intellectual property Other conditions belong to TMC's intellectual property - TYPICAL MALFUNCTION THRESHOLDS TMC's intellectual property - COMPONENT OPERATING RANGE Motor generator control ECU P0C19 (INF P0C1900) is not detected CONFIRMATION DRIVING PATTERN HINT: Click here Click here HINT: Check that there are no abnormalities (abnormal sounds, coolant leaks, etc.). HINT: [*1] to [*2]: Normal judgment procedure. The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs. HINT: WIRING DIAGRAM Refer to the wiring diagram for the Motor High-voltage Circuit. Click here Refer to the wiring diagram for the Shut Down Signal Circuit. Click here Refer to the wiring diagram for the Generator High-voltage Circuit. Click here CAUTION / NOTICE / HINT CAUTION: Click here HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. *a Without waiting for 10 minutes NOTICE: After
turning the 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 PROCEDURE 1. CHECK DTC OUTPUT (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes. (d) Check for DTCs. Result Proceed to P0C1900 only is output, or DTCs except the ones in the table below are also output. A DTCs of hybrid control system in the tables below are output. B DTCs of motor generator control system in the tables below are output. C Malfunction Content System Relevant DTC Insulation Malfunction Hybrid control system P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure System Main Relay or High Voltage Circuit Malfunction Hybrid control system P0AD911 Hybrid/EV Battery Positive Contactor Circuit Short to Ground P0AD915 Hybrid/EV Battery Positive Contactor Circuit Short to Battery or Open P0ADD11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground P0ADD15 Hybrid/EV Battery Negative Contactor Circuit Short to Battery or Open P1C8449 High Voltage Power Resource Circuit Short during Ready ON Malfunction Content System Relevant DTC Microcomputer malfunction Motor generator control system P0A1A47 Generator Control Module Watchdog / Safety μC Failure P0A1A49 Generator Control Module Internal Electronic Failure P0A1B1F Generator Control Module Circuit Intermittent P1C2A1C Generator A/D Converter Circuit Circuit Voltage Out of Range P1C2A49 Generator A/D Converter Circuit Internal Electronic Failure P1C2B1C Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range P1C2B49 Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure P313383 Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect P313386 Communication Error from Generator to Drive Motor "A" Signal Invalid P313387 Communication Error from Generator to Drive Motor "A" Missing Message P313483 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect P313486 Communication Error from Drive Motor "A" to Generator Signal Invalid P313487 Communication Error from Drive Motor "A" to Generator Missing Message Hybrid control system P0A1B49 Drive Motor "A" Control Module Internal Electronic Failure Power source circuit malfunction Motor generator control system P06B01C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range Sensor and actuator circuit malfunction Motor generator control system P0A3F16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold P0A3F21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum P0A3F22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold P0A4B21 Generator Position Sensor Signal Amplitude < Minimum P0A4B22 Generator Position Sensor Signal Amplitude > Maximum P0A6012 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery P0A6014 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open P0A601C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range P0A6312 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery P0A6314 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open P0A631C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range P0BE512 Drive Motor "A" Phase U Current Sensor Circuit Short to Battery P0BE514 Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open P0BE528 Drive Motor "A" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0BE912 Drive Motor "A" Phase V Current Sensor Circuit Short to Battery P0BE914 Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open P0BE928 Drive Motor "A" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0BED12 Drive Motor "A" Phase W Current Sensor Circuit Short to Battery P0BED14 Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open P0BED28 Drive Motor "A" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0BFD62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure P0C5013 Drive Motor "A" Position Sensor Circuit "A" Circuit Open P0C5016 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold P0C5017 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold P0C5A13 Drive Motor "A" Position Sensor Circuit "B" Circuit Open P0C5A16 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold P0C5A17 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold P0C6413 Generator Position Sensor Circuit "A" Circuit Open P0C6416 Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold P0C6417 Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold P0C6913 Generator Position Sensor Circuit "B" Circuit Open P0C6916 Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold P0C6917 Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold P0D2D16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold P0D2D17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold P0DFA62 Generator Phase U-V-W Current Sensor Signal Compare Failure P0E0012 Generator Phase U Current Sensor Circuit Short to Battery P0E0014 Generator Phase U Current Sensor Circuit Short to Ground or Open P0E0028 Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0E0412 Generator Phase V Current Sensor Circuit Short to Battery P0E0414 Generator Phase V Current Sensor Circuit Short to Ground or Open P0E0428 Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0E0812 Generator Phase W Current Sensor Circuit Short to Battery P0E0814 Generator Phase W Current Sensor Circuit Short to Ground or Open P0E0828 Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure P0E3116 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold P0E3117 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold P0E5111 DC/DC Converter Current Sensor Circuit Short to Ground P0E5115 DC/DC Converter Current Sensor Circuit Short to Battery or Open P0E512A DC/DC Converter Current Sensor Signal Stuck In Range P1CAC49 Generator Position Sensor Internal Electronic Failure P1CAD49 Drive Motor "A" Position Sensor Internal Electronic Failure P1CAF38 Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect P1CB038 Drive Motor "A" Position Sensor REF Signal Frequency Incorrect Hybrid control system P0C7600 Hybrid/EV Battery System Discharge Time Too Long P0D2D1C Drive Motor "A" Inverter after Boosting Voltage Sensor Circuit Voltage Out of Range P0E311C Drive Motor "A" Inverter before Boosting Voltage Sensor Circuit Voltage Out of Range P1C2D62 Drive Motor "A" Inverter before Boosting Voltage Sensor Signal Compare Failure System malfunction Motor generator control system P0A7873 Drive Motor "A" Inverter Actuator Stuck Closed P0A7A73 Generator Inverter Actuator Stuck Closed P0A9200 Hybrid Generator Performance P1C5F19 Generator Inverter Circuit Current Above Threshold HINT: (e) Turn the power switch off. GO TO DTC CHART (HYBRID CONTROL SYSTEM) GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) 2. CHECK FREEZE FRAME DATA AND DIAGNOSIS RELATED INFORMATION (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Enter the following menus: Powertrain / Motor Generator / Utility / Diagnosis Related Information. Tester Display Diagnosis Related Information (d) Enter the following menus: Powertrain / Motor Generator / Trouble Codes. (e) Read the diagnosis related information and freeze frame data of DTC P0C1900. Result Proceed to DTC P312487 is listed in Diagnosis Related Information. A DTC
P312487 is not listed in Diagnosis Related Information and the value of
freeze frame data item Emergency Shutdown Signal is ON. B Other than above C (f) Turn the power switch off. GO TO DTC CHART (P312487) GO TO DTC CHART (P321E9F) 3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) Click here Result Proceed to OK A NG (The connector is not connected securely.) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C CONNECT SECURELY REPAIR OR REPLACE HARNESS OR CONNECTOR 4. CHECK SHUT DOWN SIGNAL CIRCUIT Click here
5. CHECK MOTOR HIGH-VOLTAGE CIRCUIT Click here
6. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT Click here
HINT: If the "Generator High-voltage Circuit" inspection results are normal, perform the next step. REPLACE INVERTER WITH CONVERTER ASSEMBLY DC/DC Converter Temperature Sensor "B" Circuit Voltage Out of Range (P0C3D1C)
Hybrid cooling system malfunction
Inverter low-voltage circuit malfunction
Related Data List
Table 1
Table 2
B
A
B
C
A
NEXT
DC/DC Converter Temperature Sensor "A" Circuit Voltage Out of Range (P0C381C)
Hybrid cooling system malfunction
Inverter low-voltage circuit malfunction
Related Data List
Table 1
Table 2
B
A
B
C
A
NEXT
Drive Motor "A" Execution Torque Performance (P0C1900)
Related Data List
Table 1
Table 2
B
C
A
A
B
C
B
C
A
NEXT
NEXT
NEXT
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid / Battery Control: Service Plug Grip
Components COMPONENTS ILLUSTRATION *1 LUGGAGE TRIM SERVICE HOLE COVER - - ILLUSTRATION *1 BATTERY SERVICE HOLE COVER *2 SERVICE PLUG GRIP Inspection INSPECTION PROCEDURE 1. INSPECT SERVICE PLUG GRIP (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester ...
