Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITIONS TEST. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (T332) RDM POSITION SENSOR 1/2 SUPPLY CIRCUIT FOR AN OPEN
1. Turn the Ignition off.
2. Disconnect the C1 DTCM harness connector.
3. Disconnect the Rear Driveline Module (RDM) harness connector.
4. Using a Multimeter, check the (T332) RDM Position Sensor 1/2 Supply circuit for continuity between pin 74 of the DTCM C1 harness connector and Pin 4 of the RDM harness connector.
  Was continuity present ?
  
  Yes
  - Go To 3
  No
  - Repair the (T332) RDM Position Sensor 1/2 Supply circuit for an open.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK THE DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS CONNECTORS FOR PROPER OPERATION
1. Check that there are no loose or faulty connections due to oxidation or damage on pins 78, 56, 74 and 8 of the DTCM C1 harness connector.
2. Check that there are no loose or faulty connections due to oxidation or damage on pins 10, 6, 4 and 9 of the RDM harness connector.
  Were any problems found?
  
  Yes
  - Repair or replace the harness connectors as needed.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Go To 4
CHECK THE DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS FOR PROPER RESISTANCE
1. Reconnect the RDM harness connector.
2. Connect a multimeter between pins 78 and 74 of the DTCM Harness connector, checking that the resistance value detected is between 1.5 and 2 kilo ohms.
3. Connect a multimeter between pins 56 and 74 of the DTCM Harness connector, checking that the resistance value detected is between 1.5 and 2 kilo ohms.
  Is the resistance between 1.5 and 2 kilo ohms ?
  
  Yes
  - Go To 5
  No
  - Go To 6
CHECK THE DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS FOR PROPER RESISTANCE
1. Connect a multimeter between pins 78 and 8 of the DTCM harness connector, checking that the resistance value detected is between 3 and 6 kilo ohms.
2. Connect a multimeter between pins 56 and 8 of the DTCM harness connector, checking that the resistance value detected is between 3 and 6 kilo ohms.
  Is the resistance between 3 and 6 kilo ohms?
  
  Yes
  - Go To 7
  No
  - Go To 6
CHECK THE REAR DRIVELINE MODULE (RDM) ACTUATOR MOTOR FOR AN INTERNAL FAILURE
1. Disconnect the RDM harness connector.
2. Connect a multimeter between pins 10 and 4 of the RDM actuator harness connector (motor side) and measure the resistance.
3. Connect a multimeter between pins 6 and 4 of the RDM actuator harness connector (motor side) and measure the resistance.
  Is the resistance between 1.5 and 2 kilo ohms ?
  
  Yes
  - Go To 7
  No
  - Replace the Rear Driveline Module (RDM) in accordance with the service information. Refer to REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK THE REAR DRIVELINE MODULE (RDM) ACTUATOR MOTOR FOR AN INTERNAL FAILURE
1. Connect a multimeter between pins 10 and 9 of the RDM actuator harness connector (motor side) and measure the resistance.
2. Connect a multimeter between pins 6 and 9 of the RDM actuator harness connector (motor side) and measure the resistance.
  Is the resistance between 3 and 6 kilo ohms ?
  
  Yes
  - Go To 8
  No
  - Replace the Rear Driveline Module (RDM) in accordance with the service information. Refer to REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK THE REAR DRIVELINE MODULE (RDM) ACTUATOR MOTOR FOR AN INTERNAL FAILURE
1. Connect a multimeter between pin 10 of the RDM actuator harness connector (motor side) and the RDM actuator motor casing and check that the resistance value detected is higher than 20 megaohms.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 9
  No
  - Replace the Rear Driveline Module (RDM) in accordance with the service information. Refer to REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK THE REAR DRIVELINE MODULE (RDM) ACTUATOR MOTOR FOR AN INTERNAL FAILURE
1. Connect a multimeter between pin 6 of the RDM actuator harness connector (motor side) and the RDM actuator motor casing and check that the resistance value detected is higher than 20 megaohms.
  Is the resistance higher than 20 megaohms?
  
  Yes
  - Go To 10
  No
  - Replace the Rear Driveline Module (RDM) in accordance with the service information. Refer to REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
CHECK THE DRIVETRAIN CONTROL MODULE (DTCM) WIRE HARNESS FOR PROPER OPERATION
1. Check that the circuits between the RDM and the DTCM are not faulty. In particular, that there are no open circuit or short circuit conditions.
  Were any problems found?
  
  Yes
  - Repair the DTCM wire harness as needed.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Go To 11
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all DTCM 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 DTCM 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 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 DTCM Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the DTCM Module in accordance with the Service information. Refer to MODULE, DRIVETRAIN CONTROL (DTCM), REMOVAL AND INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Repair the poor connections as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .