DTC Troubleshooting: P2122 (37)
DTC P2122: | APP Sensor A Circuit Low Voltage |
1. | Turn the ignition switch ON (II). |
2. | Check the APP SENSOR-A in the DATA LIST with the HDS. Is there about 0.1 V or less? YES - Go to 3. NO - Intermittent failure, system is OK at this time. |
3. | Turn the ignition switch OFF. |
4. | Disconnect the APP sensor 6P connector. |
5. | Turn the ignition switch ON (II). |
6. | At wire harness side, measure voltage between the APP sensor 6P connector terminals No. 5 and No. 6.
Is there about 5 V? YES - Go to 7. NO - Go to 15. |
7. | Turn the ignition switch OFF. |
8. | At sensor side, measure resistance between the APP sensor 6P connector terminals No. 4 and No. 6 with the throttle fully closed.
Is there about 0.35-0.45 kW at room temperature? YES - Go to 9. NO - Go to 16. |
9. | At sensor side, measure resistance between the APP sensor 6P connector terminals No. 4 and No. 5 with the throttle fully closed.
Is there about 2.7-3.3 kW at room temperature? YES - Go to 10. NO - Go to 16. |
10. | Jump the SCS line with the HDS. |
11. | Disconnect ECM/PCM connector A (31P). |
12. | At 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 the APP sensor A and ECM/PCM (A26), then go to 17. NO - Go to 13. |
13. | Connect ECM/PCM connector terminal A26 to body ground with a jumper wire.
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14. | At wire harness side, check for continuity between APP sensor 6P connector terminal No. 4 and body ground.
Is there continuity? YES - Go to 22. NO - Repair open in the wire between the APP sensor A and ECM/PCM (A26), then go to 17. |
15. | Measure voltage between ECM/PCM connector terminals A21 and A24.
Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A21) and the APP sensor A, then go to 17. NO - Go to 22. |
16. | Replace the APP sensor. |
17. | Reconnect all connectors. |
18. | Turn the ignition switch ON (II). |
19. | Reset the ECM/PCM with the HDS. |
20. | Do the ECM/PCM idle learn procedure. |
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 the APP sensor A and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.n |
22. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
23. | 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 the APP sensor A and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n |