B10CF

DTC Troubleshooting: B10CF

DTC B10CF:

Left Daytime Running Lights Circuit Malfunction

NOTE:

- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
- Make sure the No. 15 (7.5 A) fuse in the driver's under-dash fuse/relay box is OK.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

3. Release the parking brake lever.

4. Turn the headlight switch OFF.

5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

Is DTC B10CF indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.

6. Turn the headlight high beam ON.

Does the left headlight (high beam) come on?

YES -

Go to step 7.

NO -

Go to step 9.

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

8. Measure the voltage between body ground and driver's under-dash fuse/relay box connector Q (20P) terminals No.1 and No. 2, and between body ground and connector R (24P) terminals No. 2 and No. 5 individually.









Is there less than 0.2 V?

YES -

Faulty driver's MICU; replace the driver's under-dash fuse/relay box Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation.

NO -

Repair an open or high resistance in the wire or poor ground (G401,G402).

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

10. Turn the headlight switch OFF.

11. Check the No. 28 (10 A) fuse in the driver's under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 12.

NO -

Replace the fuse. If the fuse blows again, repair the short to ground on the No. 28 (10 A) fuse circuit.

12. Check the left headlight bulb.

Is the bulb OK?

YES -

Go to step 13.

NO -

Replace the bulb and recheck.

13. Disconnect driver's under-dash fuse/relay box connector F (33P).

14. Disconnect the left headlight (high beam) 2P connector.

15. Check for continuity between driver's under-dash fuse/relay box connector F (33P) terminal No. 13 and left headlight (high beam) 2P connector terminal No. 2.





Is there continuity?

YES -

Go to step 16.

NO -

Repair an open or high resistance in the wire.

16. Check for continuity between left headlight (high beam) 2P connector terminal No. 1 and body ground.





Is there continuity?

YES -

Faulty driver's MICU; replace the driver's under-dash fuse/relay box Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation.

NO -

Repair an open or high resistance in the wire or poor ground (G302).