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Possible Causes

MIRRORS INOPERATIVE PINPOINT TEST REFERENCE

PINPOINT TEST 1 THE MIRRORS ARE INOPERATIVE
STEP INSPECTION ACTION
1 CHECK THE SMART JUNCTION BOX (SJB) FUSE
  • Key OFF.
  • Disconnect: Smart junction box (SJB) fuse 30 (5A).
  • Is the fuse OK? 
 Yes Go to next step.
No Install a new fuse. Test the system for normal operation. If fuse 30 (5A) fails again, check for a short to ground. Repair as necessary.
2 CHECK THE VOLTAGE TO THE EXTERIOR REAR VIEW MIRROR CONTROL - CIRCUIT (O/LG)
  • Disconnect: Exterior rear view mirror switch 0912-301.
  • Measure the voltage between exterior rear view mirror switch 0912-301 pin 4, circuit (O/LG), and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to next step.
No Repair the circuit. Test the system for normal operation.
3 CHECK CIRCUIT (B) FOR OPEN
  • Measure the resistance between exterior rear view mirror switch 0912-301 pin 8, circuit (B), and ground.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Repair the circuit. Test the system for normal operation.
4 CHECK CIRCUIT (Y/B) FOR OPEN
  • Disconnect: LH exterior rear view mirror 0912-302.
  • Disconnect: RH exterior rear view mirror 0912-303.
  • Measure the resistance between exterior rear view mirror switch 0912-301 pin 7, circuit (Y/B), and LH exterior rear view mirror 0912-302 pin 2, circuit (Y/B).
  • Is the resistance less than 5 ohms? 
 Yes Install a new exterior rear view mirror control switch. Test the system for normal operation.
No Repair the circuit. Test the system for normal operation.
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