Diagnostic Aids

For any test that requires probing ECM or component harness connectors, use Connector Test Adapter Kit (J-35616-A). This will prevent damage to harness connector terminals.

Check AIR system for intermittent short to ground in relay control circuit, or short to battery voltage on pump feed circuit. Check for sticking relay contacts or a sticking AIR cutoff valve.

Using FREEZE FRAME data may aid in locating intermittent condition. If DTC cannot be duplicated, review information in FREEZE FRAME. Try to operate vehicle within same FREEZE FRAME conditions (RPM, MAF, vehicle speed and temperature). This may help to recreate malfunction.