DTC 31

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

NOTE: If the IPU module fan duct is blocked, DTC P16C3 (31) may be detected.

1. Turn the ignition switch ON (II).
2. Check for IMA system 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. Check the IPU module air duct and IPU module fan for disconnection, damage, or obstructions.
Are the IPU module air duct and IPU module fan OK?
YES - Replace the DC-DC converter, then go to step 5.
NO - Repair the IPU module air duct or IPU module fan as necessary, then go to step 5.

5. Turn the ignition switch ON (II).
6. Reset the BCM module with the HDS.
7. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P16C3 (31) is indicated, check for poor connections or loose terminals at the IPU module and the BCM module, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the BCM module was updated, troubleshooting is complete. If the BCM module was substituted, replace the original BCM module.