P2128
DTC P2128: APP Sensor 2 Circuit High Voltage1. Turn the ignition switch ON (II).
2. Check the APP SENSOR-2 in the DATA LIST with the HDS.
Is there about 186 °, 186 % or 4.8 V or more?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the APP sensor and at the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the APP sensor 6P connector.
5. Turn the ignition switch ON (II).
6. At the wire harness side, measure voltage between APP sensor 6P connector terminals No.1 and No.2.
Is there about 5 V?
YES - Go to step 11.
NO - Go to step 7.
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector B (56P).
10. Check for continuity between PCM connector terminal B31 and APP sensor 6P connector terminal No.2.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between APP sensor 2 and the PCM (B31), then go to step 12.
11. Replace the APP sensor.
12. Reconnect PCM connectors.
13. Turn the ignition switch ON (II).
14. Reset the PCM with the HDS.
15. Do the PCM idle learn procedure.
16. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2128 is indicated, check for poor connections or loose terminals at APP sensor 2 and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.
17. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
18. Do the PCM idle learn procedure.
19. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2128 is indicated, check for poor connections or loose terminals at APP sensor 2 and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substitute, replace the original PCM.