P2122
DTC P2122: APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Check APP SENSOR-A in the DATA LIST with the HDS.
Is there about 0.1 V or less?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at APP sensor A and 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.5 and No.6.
Is there about 5 V?
YES - Go to step 7.
NO - Go to step 15.
7. Turn the ignition switch OFF.
8. At the sensor side, measure resistance between APP sensor 6P connector terminals No.4 and No.6 with the throttle fully closed.
Is there about 0.35 - 0.45 kOhm, at room temperature?
YES - Go to step 9.
NO - Go to step 16.
9. At the sensor side, measure resistance between APP sensor 6P connector terminals No.4 and No.5 with the throttle fully closed.
Is there about 2.7 - 3.3 kOhm at room temperature?
YES - Go to step 10.
NO - Go to step 16.
10. Jump the SCS line with the HDS.
11. Disconnect PCM connector C (22P).
12. At the wire harness side, check for continuity between APP sensor 6P connector terminal No.4 and body ground.
Is there continuity?
YES - Repair short in the wire between APP sensor A and the PCM (C5), then go to step 17.
NO - Go to step 13.
13. Connect PCM connector terminal C5 to body ground with a jumper wire.
14. At the wire harness side, check for continuity between APP sensor 6P connector terminal No.4 and body ground.
Is there continuity?
YES - Go to step 22.
NO - Repair open in the wire between APP sensor A and the PCM (C5), then go to step 17.
15. Measure voltage between PCM connector terminals C4 and C6.
Is there about 5 V?
YES - Repair open in the wire between the PCM (C6) and APP sensor A, then go to step 17.
NO - Go to step 22.
16. Replace the APP sensor.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure. Programming and Relearning
21. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2122 is indicated, check for poor connections or loose terminals at APP sensor A 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.
22. Update the PCM if it does not have the latest software, or substitute a known-good PC.
23. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicate?
YES - If DTC P2122 is indicated, check for poor connections or loose terminals at APP sensor A 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 - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.