Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for other existing ENGINE diagnostic trouble codes.

If DTC P06D4-00 is present, perform the confirmation procedure (diagnosis procedure) for this other DTC first.

Is applicable DTC detected?

YES

Perform diagnosis of applicable DTC. Refer to DTC Description .

NO

GO TO 2 .

Check for DTC P2128-00 being current on the CONSULT screen.

Is applicable DTC current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Disconnect the accelerator pedal position sensor from engine harness connector.
3. Inspect the accelerator pedal position sensor connector for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab.

Is the inspection result normal?

YES

GO TO 4 .

NO

Repair or replace error-detected parts.

1. Turn ignition switch ON.
2. Check the voltage between accelerator pedal position sensor supply voltage and return circuit terminals.

   APPS			Voltage (V)
   Connector	Terminal (+)	Terminal (-)
   E20	1	5	Approx. 5

Is the inspection result normal?

YES

GO TO 5 .

NO

GO TO 7 .

1. Insure ignition switch is still ON.
2. Wait 30 seconds.
3. Using CONSULT, check for current ENGINE diagnostic trouble codes.

Did P2127-00 DTC become current and P2128-00 DTC become past?

YES

GO TO 6 .

NO

GO TO 7 .

1. Turn ignition switch OFF.
2. Reconnect the accelerator pedal position sensor connector.
3. Turn ignition switch ON.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.

Did P2123-00 DTC become current?

YES

• Replace the accelerator pedal position sensor. Refer to Removal and Installation .
• GO TO 11 .

NO

• The removal and installation of the connector corrected the issue.
• GO TO 11 .

1. Turn ignition switch OFF.
2. Disconnect ECM from engine harness connector.
3. Inspect the ECM connector for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab.

Is the inspection result normal?

YES

GO TO 8 .

NO

Repair or replace error-detected parts.

Check the return circuit for continuity between APPS sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

GO TO 9 .

NO

Repair return circuit for open in harness or connectors.

Check the continuity between APPS sensor signal and all other circuits at ECM harness connector.

Is the inspection result normal?

YES

GO TO 10 .

NO

Repair signal circuit for a short in harness connector.

1. Connect all components in the correct positions.
2. Turn ignition switch ON.
3. Wait 30 seconds.
4. Using CONSULT, check for past ENGINE diagnostic trouble codes.

Is P2128-00 DTC past?

YES

• The removal and installation of the connector corrected the issue.
• GO TO 11 .

NO

• Replace the ECM. Refer to Removal and Installation .
• GO TO 11 .

1. Using CONSULT, erase all DTCs.
2. Operate the engine within the conditions for setting the DTC.
3. Using CONSULT, check for existing ENGINE diagnostic trouble codes.

Is P2128-00 DTC current?

YES

Troubleshooting procedure needs to be repeated. Go to DTC Description .

NO

Repair complete.