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. With the scan tool, read the Amplifier (AMP) 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 AMPLIFIER FUSED B(+) CIRCUIT
1. Measure the resistance of the (A901) Fused B(+) circuit between the Rear Power Distribution Center (PDC) connector and the AMP harness connector.
  Is the resistance above 3.0 ohms?
  
  Yes
  - Repair or replace the (A901) Fused B(+) circuit for an open or high resistance.
  No
  - Go to 3.
CHECK BATTERY STATUS
1. Check the correct battery charge status by connecting the Midtronics GR8 Battery Tester or an equivalent Battery tester.
  Is the Battery voltage within specifications?
  
  Yes
  - Go to 4.
  No
  - Recharge or replace the Battery. Refer to BATTERY, REMOVAL AND INSTALLATION .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all AMP 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 AMP 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 AMP Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the AMP Module in accordance with the Service information. Refer to AMPLIFIER, REMOVAL AND INSTALLATION .
  - Perform the Body VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the Body VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.