P16C3

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

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

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U1220 or U1221 indicated?
YES - Go to the indicated DTC's troubleshooting.
NO - Go to step 3.

3. Check the DC-DC CONVERTER TEMP. in the DATA LIST with the HDS.
Is about more than 419°F (215°C), or less than - 40°F (-40°C) indicated?
YES - Go to step 4.
NO - Intermittent failure, 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 MCM.
7. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P16C3 is indicated, check for poor connections or loose terminals at the DC-DC converter and the MCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.