Toyota Corolla Cross: System Voltage (AM) Circuit Voltage Below Threshold (P1AFC00)
DESCRIPTION
The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction.
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
P1AFC00 | System Voltage (AM) Circuit Voltage Below Threshold |
The battery ECU assembly shutdown memory procedure did not complete normally in consecutive 40 trips. (1 trip detection logic) |
| Does not come on |
Master Warning: Comes on |
SAE Code: P1AFC |
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 and wait for 11 seconds or more. *1
- Turn the ignition switch off and wait for 2 minutes or more. *2
- Perform the procedures *1 and *2 41 times or more.
- Turn the ignition switch to ON and turn the GTS on.
- Enter the following menus: Powertrain / HV Battery / 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 DTC P056014.
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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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PROCEDURE
|
1. | CHECK FUSE (ECU-B NO. 2) |
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| NG | .gif) | REPLACE FUSE (ECU-B NO. 2) |
|
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|
2. | CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY) |
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| NG | | CONNECT SECURELY |
|
|
3. | CHECK HARNESS AND CONNECTOR (AM VOLTAGE) |
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| OK | | REPLACE BATTERY ECU ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT) |
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