Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (G123) FUEL QUANTITY SOLENOID 2 12.0 VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Fuel Quantity Solenoid 2 harness connector.
3. Disconnect the PCM-2 C2 harness connector.
4. Check for continuity between ground and the (G123) Fuel Quantity Solenoid 2 Supply 12.0 Volt Supply circuit at the Fuel Quantity Solenoid 2 harness connector.
  Is there continuity between ground and the (G123) Fuel Quantity Solenoid 2 Supply 12.0 Volt Supply circuit?
  
  Yes
  - Repair the (G123) Fuel Quantity Solenoid 2 Supply 12.0 Volt Supply circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (G123) FUEL QUANTITY SOLENOID 2 SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (G123) Fuel Quantity Solenoid 2 Supply circuit at the Fuel Quantity Solenoid 2 harness connector.
  Is there continuity between ground and the (G123) Fuel Quantity Solenoid 2 Supply circuit?
  
  Yes
  - Go To 4
  No
  - Repair the (G123) Fuel Quantity Solenoid 2 Supply circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
FUEL QUANTITY SOLENOID 2
1. Reconnect the PCM-2 C2 harness connector.
2. Reconnect the Fuel Quantity Solenoid 2 harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Turn the ignition off.
6. Disconnect the Fuel Quantity Solenoid 2 harness connector.
7. Turn the ignition on.
8. With the scan tool, read PCM-2 DTCs.
  NOTE:
  The P2370-FUEL QUANTITY REGULATOR B CONTROL CIRCUIT OPEN DTC should be active or pending with the harness connector unplugged.
  
  Did the DTC set as described above?
  
  Yes
  - Replace the Fuel Quantity Solenoid 2 in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM-2 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.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all PCM-2 harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect 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. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module 2 (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
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .