DTC Troubleshooting

DTC Troubleshooting: P16BF

DTC P16BF: Starter Relay STRLY Circuit Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS and wait 5 seconds.

3. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P16BF indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at starter relay 1, starter relay 2, and the PCM.


4. Turn the ignition switch to LOCK (0).

5. Jump the SCS line with the HDS.

6. Remove starter relay 1 and starter relay 2.

7. Disconnect PCM connector E (31P).

8. Check for continuity between PCM connector terminal E21 and body ground.

Is there continuity?
YES - Repair short in the wire between the PCM (E21) and starter relay 1 or starter relay 2, then go to step 9.

NO - Go to step 14.






9. Reconnect all connectors.

10. Turn the ignition switch to ON (II).

11. Reset the PCM with the HDS.

12. Do the PCM idle learn procedure. PCM Idle Learn Procedure

13. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P16BF indicated?
YES - Check for poor connections or loose terminals at starter relay 1, starter relay 2, and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


14. Reconnect all connectors.

15. Update the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM. Initial Inspection and Diagnostic Overview

16. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P16BF indicated?
YES - Check for poor connections or loose terminals at starter relay 1, starter relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM, Initial Inspection and Diagnostic Overview then recheck. If the PCM was substitute, go to step 1.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.