DTC P0651: Sensor Reference Voltage B Malfunction Honda Crosstour I

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION (+).

Scheme 446

Scheme 447

Scheme 448

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HAS.
3. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0651 indicated? YES -Go to next step. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the PCM and these components: MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor
4. Turn the ignition switch to LOCK (0).
5. Disconnect the connectors from these components: MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor
6. Turn the ignition switch to ON (II).
7. Clear the DTC with the HAS.
8. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0651 indicated? YES -Go to step 10 . NO -Go to next step.
9. Check for Pending or Confirmed DTCs with the HAS while reconnecting these components, one at a time: MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor Is DTC P0651 indicated? YES -Replace the component that caused the DTC when it was reconnected, then go to step 14 . NO -Check for poor connections or loose terminals at the PCM and the following components, then go to step 1 . MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HAS.
12. Disconnect PCM connectors A (49P), B (49P), and C (49P).
13. Check for continuity between body ground and PCM connector terminals A25, A36, B36, and C11 individually. Is there continuity? YES -Repair a short in the wire between the PCM (A25, A36, B36, or C11) and each component that was disconnected in step 5 , then go to next step. NO -Go to step 20 .
14. Turn the ignition switch to LOCK (0).
15. Reconnect all connectors.
16. Turn the ignition switch to ON (II).
17. Reset the PCM with the HAS.
18. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-360079-S22847966492010042600000) (+).
19. Check for DTCs with the HAS. Is DTC P0651 indicated? YES -Check for poor connections or loose terminals at the PCM and the following components, then go to step 1 . MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
20. Reconnect all connectors.
21. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-360080-S11980508702010042600000) (+) or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-360056-S32194616542010042600000) (+).
22. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0651 indicated? YES -If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-360056-S32194616542010042600000) (+) then recheck. If the PCM was substituted, check for poor connections or loose terminals at the PCM and the following components, then go to step 1 . MAP sensor Output shaft (countershaft) speed sensor Rocker arm oil pressure sensor A/C pressure sensor APP sensor FTP sensor NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-360080-S27881728262010042600000) (+). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.