Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. Turn the turn signal on, if equipped with turn signal mirror.
4. Open the driver door to turn the approach lamps on, if equipped. Leave the door open.
5. Turn the rear defogger on.
6. Press and release the Mirror Select switch to select the Driver Outside Rearview Mirror.
7. Operate the Mirror Adjust switch in all directions several times while monitoring the scan tool for DTCs.
  NOTE:
  After adjusting the mirror in one direction wait at least two seconds before adjusting the mirror in the opposite direction, as this will allow time for an active fault to set if present.
8. With the scan tool, read DDM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - The condition or conditions that originally set this DTC are not present at this time. For vehicle's equipped with folding outside rearview mirrors, repeat test with mirror folded. If no trouble found, using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (C16) DRIVER MIRROR HEATER DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror C3 and C4 (Component Side) connectors.
3. Disconnect the Driver Door Module C2 harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (C16) Driver Mirror Heater Driver circuit in the Driver Outside Rearview Mirror C3 (Component Side) connector at the Driver Door Module C2 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (C16) Driver Mirror Heater Driver circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (C16) DRIVER MIRROR HEATER DRIVER CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (C16) Driver Mirror Heater Driver circuit between the Driver Outside Rearview Mirror connector and the Driver Door Module C2 harness connector.
  Is the resistance below 2.0 ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (C16) Driver Mirror Heater Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (C160) DRIVER MIRROR HEATER RETURN CIRCUIT FOR AN OPEN
1. Measure the resistance of the (C160) Driver Mirror Heater Return circuit between the Driver Outside Rearview Mirror connector and the Driver Door Module C2 harness connector.
  Is the resistance below 2.0 ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (C160) Driver Mirror Heater Return circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all DDM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all DDM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read DDM DTCs.
  Did the DTC return?
  
  Yes
  - Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR (DDM/PDM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .