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P0309-CYLINDER #9 MISFIRE (CONTINUED) 3. (K342) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Ignition Coil harness connector. Disconnect the Fuel Injector harness connector. Ignition on, engine not running. With the scan tool, actuate the ASD Relay. Using a 12-volt test light connected to ground, probe the (K342) ASD Does the test light illuminate brightly? Yes >> Go To 4 No >> Repair the excessive resistance or short to ground in the (K342) ASD Relay Output circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 4. IGNITION SYSTEM OPERATION Turn the ignition off. Connect the Ignition Coil harness connector. Remove the Ignition Coil. Leave the Fuel Injector harness connector of the cylinder being tested disconnected. Install a spark tester on the Ignition Coil. While cranking the engine observe the spark coming from the spark tester. NOTE: A crisp blue spark that is able to jump the gap of the spark tester should be generated. Is good spark present? Yes >> Go To 5 No >> Go To 14 NOTE: Connect the Fuel Injector harness connector before continuing. 9 - 1802 ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10 DR/DH |