Diesel Data: Automotive Repair

Daytime Running Lights Control Unit Input Test (USA)




Daytime Running Lights Control Unit Input Test

'08-10 USA models

NOTE:

- Before testing, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
- Make sure the headlights high beam come on normally with the combination light switch ON.

1. Remove the driver's dashboard lower cover Driver's Dashboard Lower Cover Removal/Installation.

2. Disconnect the 14P connector (A) from the daytime running lights control unit (B).





3. Inspect the connector and socket terminals to be sure they are all making good contact.

- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 4.

4. Reconnect the connector to the daytime running lights control unit, and do these input tests at the connector.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, replace the daytime running lights control unit.