Diagnosis Procedure
DIAGNOSIS PROCEDURE CHART
| Step | Action | YES | NO |
|---|---|---|---|
| 1 | CHECK COMBINATION SWITCH (LIGHTING SWITCH) OPERATION Check that the headlamps operate normally by operating the combination switch (lighting and turn signal switch). Do they operate normally? |
GO TO 2 | Refer to [DIAGNOSIS AND REPAIR WORKFLOW: EXTERIOR LIGHTING SYSTEM ] |
| 2 | CHECK FRONT DOOR SWITCH LH SIGNAL CIRCUIT Perform a unit inspection for the front door switch LH. Refer to [DOOR SWITCH CIRCUIT CHECK [CREW CAB] ] or [DOOR SWITCH CIRCUIT CHECK [KING CAB] ] Is the inspection result normal? |
Replace the BCM. Refer to [BCM (BODY CONTROL MODULE): REMOVAL AND INSTALLATION ] | Refer to [DOOR SWITCH CIRCUIT CHECK [CREW CAB] ] or [DOOR SWITCH CIRCUIT CHECK [KING CAB] ] |