[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. P2123: Accelerator Pedal Position Sensor (Main) Circuit High Input | PRINT PAGE / INDEX / PRIOR / NEXT

Code No. P2123: Accelerator Pedal Position Sensor (Main) Circuit High Input
OPERATION A power voltage of 5 V is applied to the accelerator pedal position sensor (terminal No. 2) from the engine-A/T-ECU (terminal No. 92). The power voltage is earthed to the engine-A/T-ECU (terminal No. 91) from the accelerator pedal position sensor (terminal No. 1). The sensor signal is inputted to the engine-A/T-ECU (terminal No. 114) from the accelerator pedal position sensor output terminal (terminal No. 3).
FUNCTION The accelerator pedal position sensor (main) outputs voltage which corresponds to the accelerator pedal depression. The engine-A/T-ECU checks whether the voltage is within a specified range.
TROUBLE JUDGMENT Check Conditions Ignition switch is in "ON" position. Accelerator pedal position sensor (sub) output voltage is 0.2 - 2.5 V. Judgment Criteria Accelerator pedal position sensor (main) output voltage is 4.5 V or higher for 1 second. <Vehicles except for Australia, South africa> Accelerator pedal position sensor (main) output voltage is 4.8 V or higher for 0.3 second. <Vehicles for Australia, South africa>
PROBABLE CAUSE Failed accelerator pedal position sensor Open/short circuit in accelerator pedal position sensor circuit or loose connector contact Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. MUT-II/III data list Refer to Data List Reference Table . Item 78: Accelerator pedal position sensor (main) Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Go to Step 2 .
| STEP 2. Connector check: B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector
| Q: Is the check result normal? YES: Go to Step 3 . NO: Repair.
| STEP 3. Check accelerator pedal position sensor itself. Check accelerator pedal position sensor itself (Refer to ). Q: Is the check result normal? YES: Go to Step 4 . NO: Replace accelerator pedal position sensor.
| STEP 4. Perform resistance measurement at B-124 <Vehicles except for Australia, South africa and Hong kong> or C-41 <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector.
| Disconnect connector, and measure at harness side. Resistance between terminal No. 1 and earth. OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 5 . NO: Go to Step 6 .
| STEP 5. MUT-II/III data list Refer to Data list reference table . Item 78: Accelerator pedal position sensor (main) Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Replace engine-A/T-ECU.
| STEP 6. Connector check: C-137 engine-A/T-ECU connector
| Q: Is the check result normal? YES: Go to Step 7 . NO: Repair.
| STEP 7. Check harness between B-124 (terminal No.1) <Vehicles except for Australia, South africa and Hong kong> or C-41 (terminal No.2) <Vehicles for Australia, South africa and Hong kong> accelerator pedal position sensor connector and C-137 (terminal No. 91) engine-A/T-ECU connector.
| Check earthing line for open circuit and damage. Q: Is the check result normal? YES: Go to Step 5 . NO: Repair.

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. P2123: Accelerator Pedal Position Sensor (Main) Circuit High Input | PRINT PAGE / INDEX / PRIOR / NEXT

©2004 Mitsubishi Motors Corporation