Diagnostic Procedure

NOTE: Record the Freeze Frame Information that set along with the DTC.

Turn the ignition on.
With the DRBIII®, read DTC's.

Is the Good Trip displayed and equal to zero?
1. Yes: Go To 2
2. No: Go To 8.
Turn the ignition off.
Disconnect the Ignition Coil harness connector.

Turn the ignition on.

With the DRBIII®, actuate the ASD Relay.

Using a 12 volt test light connected to ground, probe the ASD Relay Output circuit in the Ignition Coil harness connector.

Does the test light illuminate brightly?
1. Yes: Go To 3
2. No: Go To 6.
Turn the ignition off.
Disconnect the Ignition Coil harness connector.

Disconnect the PCM harness connector.

Measure the resistance of the Ignition Coil driver circuit between the Ignition Coil harness connector and the PCM harness connector.

Is the resistance below 5.0 ohms?
1. Yes: Go To 4
2. No: Repair the Ignition Coil driver circuit for an open.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
Turn the ignition off.
Disconnect the Ignition Coil harness connector.

Disconnect the PCM harness connector.

Measure the resistance between ground and the Ignition Coil driver circuit in the Ignition Coil harness connector.

Is the resistance below 100k ohms?
1. Yes: Repair the Ignition Coil driver circuit for a short to ground.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. No: Go To 5
With the DRBIII®, erase DTC's.
Turn the ignition off.

Install a substitute Ignition Coil in place of the Ignition Coil in question.

Attempt to operate the vehicle using the information noted in the Freeze Frame.

With the DRBIII®, read DTC's.

Does the DRB display the DTC that was previously erased?
1. Yes: Replace and program the Powertrain Control Module in accordance with the Service Information.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. No: Test Complete.
Turn the ignition off.
Disconnect the Ignition Coil harness connector.

Remove the ASD Relay from the PDC.

Measure the resistance of the ASD Relay Output circuit between the ASD Relay connector and the Ignition Coil harness connector.

Is the resistance below 5.0 ohms?
1. Yes: Go To 7
2. No: Repair the ASD Relay Output circuit for an open.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .

NOTE: Repeat the following test for both capacitors.

NOTE: The Capacitors are attached to the side of each valve cover.

NOTE: If the above test result is an open fuse for both capacitor tests, the problem is a short to ground in the ASD Relay Out circuit. Repair the short to ground in the ASD Relay Output circuit and refer to POWERTRAIN VERIFICATION TEST VER - 5

Turn the ignition off.
Disconnect the Capacitor harness connector.

Install a good INJ/COIL fuse.

With the DRBIII®, actuate the ASD Relay.

Is the INJ/COIL fuse OK for both capacitor tests?
1. Yes: Replace the Capacitor(s)
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. No: Repair the ASD Output circuit for a short to ground.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.

NOTE: The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition.

With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set.
Review the DRBIII® Freeze Frame information. If possible, try to duplicate the conditions under which the DTC was set.

Refer to any Technical Service Bulletins (TSB) that may apply.

Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.

Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Were any of the above conditions present?
1. Yes: Repair as necessary.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. No: Test Complete.