9-158
P2122, P2123, P2127, P2128, P2138
EAS20632
P2122, P2123, P2127, P2128, P2138
EAS33112
TROUBLESHOOTING
Item
• [P2122] Accelerator position sensor: open or ground short circuit detected.
• [P2123] Accelerator position sensor: power short circuit detected.
• [P2127] Accelerator position sensor: ground short circuit detected.
• [P2128] Accelerator position sensor: open or power short circuit detected.
• [P2138] Output voltage deviation error
Fail-safe system
• Able/unable to start engine
• Able/unable to drive vehicle
Procedure
If a DTC other than P2138 (P2122, P2123, P2127, or P2128) is indicated, perform troubleshooting first.
1. Connection of accelerator position sensor coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
2. Connection of ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
Go to step 2.
NO
a. Connect the coupler securely or replace the wire harness.
b. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the “Recovered” condition?
YES
Go to step 6, and complete the service.
NO
Go to step 2.
Is the coupler condition normal?
YES
Go to step 3.
NO
a. Connect the coupler securely or replace the wire harness.
b. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
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