Heated Mirrors Malfunction
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Heated Mirrors Malfunction
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Heated Mirror Element Control
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1
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1
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2
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-
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Ground
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-
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1
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-
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-
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1. Heated Mirror Inoperative
2. Heated Mirror Always On
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Circuit/System Description
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The R/DEFOG relay supplies voltage to the outside rearview mirror heater elements based on the current state of the rear window defogger. The relay supplies B+ through the driver/passenger mirror heating element control circuit when a request is seen.
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Outside Mirror Description and Operation (without AAB)
Outside Mirror Description and Operation (With AAB)
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
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1.
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Engine running, press the rear window defogger switch. Verify the rear window defogger turns ON and the rear window becomes warm.
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3.
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Verify both the left and right outside mirror glass become warm.
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1.
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Ignition OFF, disconnect the X1 harness connector at the appropriate A9 outside rearview mirror.
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2.
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Wait 1 minute, test for less than 10 Ω between the ground circuit terminal 6 and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Connect a test lamp between the heater element control circuit terminal 7 and ground.
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5.
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Engine running, operate the rear window defogger ON and OFF with the rear defogger switch. The test lamp should turn ON and OFF when changing between the commanded states.
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6.
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If the test lamp is always ON, test the control circuit for a short to voltage.
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7.
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If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance.
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8.
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If all circuits test normal, test or replace the E17 outside rearview mirror glass.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Outside Rearview Mirror Glass Replacement