Diagnostic Test

CHECK FOR BATTERY AND CHARGING SYSTEM DTCS
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
  NOTE:
  The most probable cause for this DTC in this module is that the charging system or battery has failed causing a low vehicle system voltage.
  
  NOTE:
  Ensure the battery is fully charged and serviceable before proceeding.
3. With the scan tool, read the PCM DTCs.
  Are there any charging or battery related DTCs present?
  
  Yes
  - Perform the appropriate charging system or battery diagnostic procedure. Refer to DTC INDEX .
  No
  - Go To 2
CHECK FOR ACTIVE DTCS IN THE DMRL
1. With the scan tool, erase DTC's
2. Start the engine and run for two minutes.
3. With the scan tool, read DMRL DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (A927) FUSED B(+) CIRCUIT FOR HIGH RESISTANCE
1. Using the scan tool, read the Battery Voltage of the Left Rear Door Module (DMRL).
2. Using the scan tool, read the Battery Voltage of the Body Control Module (BCM).
  Is the voltage within 1.0 volt of each module?
  
  Yes
  - Go To 5
  No
  - Go To 4
CHECK THE LEFT REAR DOOR MODULE HARNESS
1. Turn the ignition off.
2. Disconnect the Left Rear Door Module connector
3. Turn the ignition on.
4. With a 12-volt test light, connect one end to the (A927) Fused B(+) circuit and the other to the (Z919) Ground at the Left Rear Door Module connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test tight illuminate brightly?
  
  No
  - Repair or replace the Left Rear Door Module harness as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  Yes
  - Go To 5
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all Left Rear Door Module 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 Left Rear Door Module 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 Vehicle Scan Report, 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 DMRL DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Left Rear Door Module in accordance with the Service Information. Refer to REAR .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.