Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Make sure the battery is fully charged before proceeding.
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. Try to operate the Front Windows up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read DDM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (Q291) DOOR MODULE FEED TO DOOR SWITCH CIRCUIT FOR AN OPEN
1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Driver Window/Door Lock Switch harness connector.
4. Turn the ignition on.
5. With a 12-volt test light connected to ground, check the (Q291) Door Module Feed To Window Switch circuit at the Driver Window/Door Lock Switch harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Go To 9
CHECK THE LIN BUS CIRCUIT
1. Measure the voltage between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door LIN Bus Return circuit at the Driver Window/Door Lock Switch C1 connector.
  Is the voltage above 8.0 volts?
  
  Yes
  - Go To 4
  No
  - Go To 5
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Turn the ignition on.
4. Measure the voltage between Ground and the (D903) Driver Door LIN Bus circuit at the Driver Door Module C5 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (D903) Driver Door LIN Bus circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Driver Window/Door Lock Switch in accordance with Service Information. Refer to SWITCH, POWER WINDOW, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D512) DRIVER DOOR LIN BUS RETURN CIRCUIT FOR AN OPEN
1. With a 12-volt test light connected to 12 volts, check the (D512) Driver Door LIN Bus Return circuit at the Driver Window/Door Lock Switch C1 harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6
  No
  - Repair the (D512) Driver Door LIN Bus Return circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage between ground and the (D903) Driver Door LIN Bus circuit at the Door Module C5 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (D903) LIN Bus circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 7
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (D903) Driver Door LIN Bus circuit at the Door Module C5 harness connector.
  Is there continuity between ground and the (D903) Driver Door LIN Bus circuit?
  
  Yes
  - Repair the (D903) Driver Door LIN Bus circuit for a short to the ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 8
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D903) Driver Door LIN Bus circuit between the Door Module C5 harness connector and the Driver Window/Door Lock Switch C1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR (DDM/PDM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (D903) Driver Door LIN Bus circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Q291) DOOR MODULE FEED TO DOOR SWITCH CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Driver Window/Door Lock Switch C1 connector.
3. Measure the resistance of the (Q291) Door Module Feed To Door Switch circuit between the Door Module C5 harness connector and the Driver Window/Door Lock Switch C1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR (DDM/PDM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (Q291) Door Module Feed To Door Switch circuit for an open.
  - Test complete. Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .