HYBRID / BATTERY CONTROL HYBRID CONTROL SYSTEM P0C7600 Hybrid/EV Battery System Discharge Time Too Long
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:
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.
| 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) |
·
Inverter with converter assembly ·
Wire harness or connector ·
Hybrid vehicle control ECU |
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.
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.
CAUTION / NOTICE / HINT
- CAUTION:
-
Refer to the precautions before inspecting high voltage circuit.
- NOTICE:
- ·
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
·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.
- HINT:
- ·
P0C7600 may be output as a result of the malfunction indicated by the DTCs in table below.
(a)The chart above is listed in inspection order of priority.
(b)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
- HINT:
-
If the "Shut Down Signal Circuit" inspection results are normal, perform the next step.
- Result:
Proceed to NEXT
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