DTC Troubleshooting

DTC P16C3 (31): DC-DC Converter Temperature Sensor Circuit Malfunction

NOTE:
- Before you troubleshoot, record all freeze data, and review the general troubleshooting information.
- may be detected. If the IPU module fan duct is blocked, DTC P16C3 (31)

1. Turn the ignition switch ON (II). If the IPU module fan duct is blocked, DTC P16C3 (31)
2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U1220 (34) or U1221(35) indicated?

YES - Go to the indicated DTC's troubleshooting.

NO - Go to step 3.

3. Check the DC-DC CONVERTER TEMPERATURE in the DATA LIST with the HDS.

Is more than 419 °F (215 °C), or less than -40 °F (-40 °C) indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time.

4. Turn the ignition switch OFF.
5. Check the IPU module air duct and the IPU module fan for disconnection, damage, or obstructions.

Are the IPU module air duct and the IPU module fan OK?

YES - Replace the DC-DC converter, then go to step 6.

NO - Repair the IPU module air duct or the IPU module fan as necessary, then go to step 6.

6. Turn the ignition switch ON (II).
7. Clear the DTC with the HDS.
8. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P16C3 (31) indicated?

YES - Check for poor connections or loose terminals at the DC-DC converter and the BCM module, then go to step 1.

NO - Go to step 9.

9. Monitor the OBD STATUS for DTC P16C3 (31) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 8, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the DC-DC converter and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.