Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN ACTIVE CONDITION
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on the repair order.
3. Record the related Freeze Frame data.
4. With the scan tool, erase DTCs.
  NOTE:
  The scan tool test will not run if there are Evaporative System faults present.
5. With the scan tool, perform the ELCM Forced Monitor test.
  Did the ELCM Forced Monitor test pass or fail?
  
  Passed
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
  Failed
  - Go To 2
CHECK THE (F342) FUSED ASD RELAY OUTPUT CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the ELCM harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (F344) Fused ASD Relay Output circuit at the ELCM harness connector.
  Is the voltage equal to Battery voltage?
  
  Yes
  - Go To 3
  No
  - Repair the (F344) Fused ASD Relay Output Circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (N46) LEAK DETECTION MODULE CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM-2 C2 harness connector.
3. Measure the resistance of the (N46) LDM Control circuit between the ELCM harness connector and the PCM-2 C2.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (N46) LDM Control circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE LDM FOR PROPER OPERATION
1. Connect the PCM-2 C2 harness connector.
2. Turn the ignition on.
3. With a 12-volt test light connected to 12 volts, probe the (N46) LDM Control Circuit at the ELCM harness connector.
4. With the scan tool, actuate the ELCM Pump to ON.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Replace the Evaporative Leak Check Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK RELATED HARNESS CONNECTIONS
1. Perform any Service Bulletins that apply.
2. Disconnect all PCM-2 harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. 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.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
6. Connect all PCM-2 harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
11. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the PCM-2 in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  - Test complete.