Toyota Corolla Cross: Hybrid/EV Battery System Discharge Time Too Long (P0C7600)
DTC SUMMARY
MALFUNCTION DESCRIPTION
When the ignition switch is turned from ON (READY) to off, the hybrid vehicle control ECU detects that the high-voltage capacitor inside the inverter with converter assembly is not discharged.
The cause of this malfunction may be one of the following:
Inverter voltage sensor (VH) internal circuit malfunction- Voltage sensor (VH) malfunction
- Motor generator control ECU (MG ECU) malfunction
- Communication (wire harness) malfunction
- Inverter with converter assembly malfunction
- Hybrid vehicle control ECU malfunction
- Wire harness malfunction
- Inverter with converter assembly malfunction
DESCRIPTION
For a description of the inverter.
Click here .gif)
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
P0C7600 | Hybrid/EV Battery System Discharge Time Too Long |
The inverter voltage (VH) does not drop during discharge. (Discharge: Offsetting of the residual pressure in the high-voltage side after ignition switch is turned off) (1 trip detection logic) |
| Does not come on |
Master Warning: Comes on |
SAE Code: P0C76 |
HINT:
When the ignition switch is turned from ON (READY) to off, the MG ECU discharges voltage stored in the inverter by allowing current to flow to motor (MG2) without generating torque. When the vehicle is normal, VH voltage becomes approximately 0 V after discharging. If VH voltage exceeds a specified value, this DTC is stored.
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.
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- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON (READY) and wait for 30 seconds or more.
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the GTS on.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
Refer to the wiring diagram for the Shut Down Signal Circuit.
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CAUTION / NOTICE / HINT
CAUTION:
Refer to the precautions before inspecting high voltage circuit.
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NOTICE:
- After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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- When disconnecting and reconnecting the auxiliary battery
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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HINT:
- P0C7600 may be output as a result of the malfunction indicated by the DTCs in table below.
- The chart above is listed in inspection order of priority.
- Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
|
Malfunction Content | System |
Relevant DTC | |
|---|---|---|---|
|
Microcomputer malfunction |
Hybrid Control System |
P060647 | Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure |
|
P060687 | Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message | ||
|
P060A47 | Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure | ||
|
P060A87 | Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message | ||
|
P0A1B49 | Drive Motor "A" Control Module Internal Electronic Failure | ||
|
P1C9E9F | Hybrid/EV System Reset Stuck Off | ||
|
Motor Generator Control System |
P0A1B1F | Generator Control Module Circuit Intermittent | |
|
P0A1A47 | Generator Control Module Watchdog / Safety MC Failure | ||
|
P0A1A49 | Generator Control Module Internal Electronic Failure | ||
|
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 | ||
|
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 | ||
|
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 | ||
|
Power source circuit malfunction |
Motor Generator Control System | P06D61C |
Generator Control Module Offset Power Circuit Voltage Out of Range |
|
P06B01C | Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range | ||
|
Communication system malfunction |
Motor Generator Control System | P313387 |
Communication Error from Generator to Drive Motor "A" Missing Message |
|
Sensor and actuator circuit malfunction |
Hybrid Control System | P0AD911 |
Hybrid/EV Battery Positive Contactor Circuit Short to Ground |
|
P0AD915 | Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open | ||
|
P0ADD11 | Hybrid/EV Battery Negative Contactor Circuit Short to Ground | ||
|
P0ADD15 | Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open | ||
|
Motor Generator Control System | P0A3F16 |
Drive Motor "A" Position Sensor Circuit Voltage Below Threshold | |
|
P0A4B16 | Generator Position Sensor Circuit Voltage Below Threshold | ||
|
P0A4B21 | Generator Position Sensor Signal Amplitude < Minimum | ||
|
P0A4B22 | Generator Position Sensor Signal Amplitude > Maximum | ||
|
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 | ||
|
System malfunction | Hybrid Control System |
P0D2D1C | Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range |
|
P1C8349 | High Voltage Power Resource Circuit Voltage Sensor after Boosting Malfunction | ||
|
Motor Generator Control System | P0D2D16 |
Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold | |
|
P0D2D17 | Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold | ||
|
P1CB69E | Drive Motor "A" Inverter Voltage Sensor (VH) Stuck On | ||
PROCEDURE
|
1. | CHECK SHUT DOWN SIGNAL CIRCUIT |
Click here
HINT:
If the "Shut Down Signal Circuit" inspection results are normal, perform the next step.
| NEXT | .gif) | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
READ NEXT:
Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range (P0D2D1C)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects a VH sensor malfunction.
The cause of this malfunction may be one of the following: Inverter voltage sensor internal circu
Boosting Converter Voltage Sensor "A" Voltage Out of Range (P0E311C)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects a VL sensor malfunction.
The cause of this malfunction may be one of the following: Inverter voltage (VL) sensor internal
Collision detected or Collision Sensor Connection (Open) (P160600,P160604)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU and airbag ECU detect that a collision has occurred and shut off the system main relay.
The cause of this DTC may be one of the fo
SEE MORE:
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB)
NOTICE:
If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before vehicle control history (RoB) has been read out and saved, the vehicle control history (RoB) information could be lost
Pressure Control Solenoid "A" Circuit Short to Battery (P074512)
DESCRIPTION
Using current from the TCM, the shift solenoid valve SL1 controls the C1 clutch
pressure in accordance with the requested shift mode.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
Memory
No
