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 received.
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Outside Mirror Description and Operation (w/o A45)
Outside Mirror Description and Operation (with A45)
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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Vehicle 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 becomes warm.
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1.
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Ignition OFF, disconnect the harness connector at the 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 4 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 6 and ground.
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5.
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Vehicle 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