For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Vehicle Access Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Verify that the Heated Mirrors Inoperative - One concern is present. Does the heated mirrors system operate as described in the Description and Operation? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Turn OFF the ignition switch.
2. Disconnect the C4 harness connector at the door control module associated with the inoperative heated mirror.
3. Ensure that all other harness connectors to the door control module remain connected.
4. Connect a test lamp between the mirror heating element supply voltage circuit and the mirror heating element low reference circuit at the door control module pins.
5. Turn ON the ignition switch, with the engine OFF.

Does the test lamp illuminate?

Go to Step 9

Go to Step 4

4 | While observing the test lamp, command the mirrors to heat by turning ON the rear window defroster. Does the test lamp illuminate? | Go to Step 5 | Go to Step 9
5 |

1. Turn OFF the ignition switch.
2. Carefully remove the mirror face of the mirror that does not heat. Refer to Outside Rearview Mirror Glass Replacement .
3. Disconnect the heated mirror harness connector from the mirror face.
4. Connect a test lamp between the mirror heater circuits of the harness connector.
5. Turn ON the ignition switch, with the engine OFF.

Does the test lamp illuminate?

Go to Step 7

Go to Step 6

6 | While observing the test lamp, command the mirrors to heat by turning ON the rear window defroster. Does the test lamp illuminate? | Go to Step 8 | Go to Step 7
7 | Inspect for poor connections at the inoperative heated mirror harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 12
8 | Inspect for poor connections at the inoperative heated mirror face harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 10
9 | Inspect for poor connections at the C4 harness connector of the door control module associated with the inoperative outside rear view mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 11
10 | Replace the inoperative heated rear view mirror face. Refer to Front Door Mirror, Mirror Face Replacement . Did you complete the replacement? | Go to Step 13 | --
11 | Important: Perform the setup procedure for the replacement door module. Refer to Door Control Module Programming and Setup . Replace the door control module associated with the inoperative outside rear view mirror. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 13

--

12 | Replace the inoperative heated rear view mirror. Refer to Front Door Mirror, Mirror Face Replacement . Did you complete the replacement? | Go to Step 13 | --
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2