Diagnostic Test

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

KNOCK SENSOR CIRCUIT PERFORMANCE
1. With the scan tool, read Powertrain Control Module 1 (PCM-1) DTCs and Freeze Frame Data and record on the repair order.
2. Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
3. With the scan tool, read PCM-1 DTCs.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK FOR HIGH RESISTANCE IN THE (K42) KS 1 SIGNAL CIRCUIT
1. Turn the ignition off.
2. Disconnect the Knock Sensor 1 harness connector.
3. Disconnect the PCM-1 C2 harness connector.
4. Measure the resistance of the (K42) KS 1 Signal circuit between the Knock Sensor 1 harness connector and the PCM-1 C2 harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the high resistance in the (K42) KS 1 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR HIGH RESISTANCE IN THE (K942) KS 1 RETURN CIRCUIT
1. Measure the resistance of the (K942) KS 1 Return circuit between the Knock Sensor 1 harness connector and the PCM-1 C2 harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the high resistance in the (K942) KS 1 Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
KNOCK SENSOR
1. Verify that there is good pin to terminal contact at the Knock Sensor and the Powertrain Control Module harness connector.
2. If no problems were found in the connectors, replace the Knock Sensor 1. Refer to SENSOR, KNOCK, REMOVAL AND INSTALLATION .
3. Reconnect the PCM-1 C2 harness connector.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
7. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 5
  No
  - Replacing Knock Sensor 1 repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM-1 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-1 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 1 (PCM-1) 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 .