Component Tests and General Diagnostics

NOTE: This diagnostic test is applicable to late build models equipped with electrochromic inside rear view mirrors.

1. Place the ignition switch in the OFF position.
2. Place the autolamp in the OFF (slider control at the far left [detent]) position.
3. Using a ball-point pen or paper clip, press and hold the mode switch located at the bottom of the mirror. After three seconds, the headlamps and parking lights will illuminate. If the headlamps do not illuminate, check inside rear view mirror C341-2, circuit 218 (W/P), for an open or a short, or check for a defective parklamp relay. The autolamp status LED will illuminate.
4. Release the mode switch. If the headlamp or status LED does not illuminate then check inside rear view mirror C341-5, circuit 54 (LG/Y), and inside rear view mirror C341-4, circuit 57 (BK), for a short or an open.
5. Place the ignition switch in the ON position. The headlamps and parking lights will extinguish. The inside rear view mirror will dim. The autolamp status indicator and headlamps will extinguish and the inside rear view mirror will darken. If the autolamps remain ON and/or the inside rear view mirror does not darken, check inside rear view mirror C341-6, circuit 640 (R/Y), for an open; or check inside rear view mirror C341-3, circuit 140 (BK/PK), for battery voltage.
6. The mirror will reset to the power-on state (mirror bright, lamps off). Once the inside rear view mirror is dark, place the gear shift lever in the REVERSE position. If the mirror does not return to full bright, check inside rear view mirror C341-3, circuit 140 (BK/PK) for an open.

NOTE: This procedure must be started within 10 seconds or the mirror will default to the power-up state.

7. Place the gear shift lever in the PARK position.
8. Place the ignition switch in the OFF position.