Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
NOTE:
Diagnose any ASD related DTCs before continuing.
1. Start the engine and allow it to idle.
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 FUSED ASD RELAY OUTPUT CIRCUIT
1. Turn the ignition off.
2. Disconnect the Ignition Coil harness connector.
3. Turn the ignition on.
4. With a scan tool, actuate the ASD Relay.
5. With a 12-volt test light connected to ground, probe the Fused ASD Relay Output circuit at the Ignition Coil harness connector.
  Is the test light illuminated and bright?
  
  Yes
  - Go To 3
  No
  - Repair the Fused ASD Relay Output circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
    NOTE:
    Stop All Actuations.
CHECK THE IGNITION COIL CONTROL CIRCUIT OPERATION
WARNING:
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
1. With a 12-volt test light connected to a 12 volt source, probe the (K18) Coil Control 3 circuit at the Ignition Coil harness connector.
2. Crank the engine for 5.0 seconds while observing the test light.
  What is the condition of the test light while cranking the engine?
  
  Brightly blinking
  - Go To 4
  OFF constantly
  - Go To 5
CHECK THE SPARK PLUG
1. Turn the ignition off.
2. Remove the Spark Plug(s) in accordance with the Service Information.
3. Inspect the Spark Plug(s) for the following conditions:
  - Cracks
  - Carbon Tracking
  - Foreign Material
  - Gap size out of specifications
  - Loose or broken electrode
  Were any of the above conditions present?
  
  Yes
  - Replace the Spark Plug in accordance with the Service Information.
    NOTE:
    If carbon tracking is found on the Spark Plug, inspect the boot on the Coil On Plug assembly for signs of damage and replace if necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Ignition Coil and Spark Plug in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (K18) COIL CONTROL 3 CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the Ignition Control Module (ICM) C2 harness connector.
3. Measure the resistance of the (K18) Coil Control 3 circuit between the Ignition Coil harness connector and the ICM C2 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (K18) Coil Control 3 circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECKING FOR THE CAUSE OF THIS DTC SETTING
NOTE:
An internally shorted or damaged Ignition Coil can cause an internal ICM coil driver failure. Do not replace the ICM without first determining if the Ignition Coil is the cause of the failure.
1. Remove the Ignition Coil that is controlled by the coil driver setting the DTC.
2. Install the Ignition Coil onto another coil location that did not have a DTC set against it.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Start the engine and allow it to idle for up to one minute.
  NOTE:
  If the engine will not start, crank the engine three times for 10 seconds.
6. With the scan tool, read DTCs and record on the repair order.
  Did a correlating fault set for the new Ignition Coil location?
  
  Yes
  - Replace the Ignition Coil in accordance with the Service Information. Refer to COIL, IGNITION, REMOVAL AND INSTALLATION .
  - Replace and program the Ignition Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all Ignition Control 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.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all Ignition Control Module 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 the Ignition Control Module in accordance with the Service Information.
  - 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 .