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2. OPEN FUSE Check for any open fuses in both IPM (PDC) or Junction Block that may be related to the No Start condition. Are any of the fuses open? Yes >> Replace the open fuse and check the related circuit(s) for a short to ground. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 3. SECONDARY INDICATORS PRESENT Ignition on, engine not running. With the scan tool, under DTCs & Related Functions, read the Secondary Indicators while cranking the engine. Are there any Secondary Indicators present while cranking the engine? Yes >> Refer to the Engine Electrical Diagnostics group and perform the tests related to the secondary indicator that is reported by the scan tool. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 4 4. POSSIBLE MECHANICAL PROBLEMS Check for any of the following conditions/mechanical problems. ENGINE VALVE TIMING - must be within specifications, check for broken timing components. ENGINE COMPRESSION - must be within specifications. ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks. Are there any engine mechanical problems? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 5 5. (K542) ASD RELAY OUTPUT CIRCUIT OPEN Turn the ignition off. Remove the ASD relay from the IPM. Disconnect the PCM harness connectors. Verify the ASD Relay is getting voltage on the Fused B+ circuits before continuing. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage Is the resistance below 5.0 ohms? Yes >> Go To 6 No >> Repair the open in the (K542) ASD Relay Output circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 1020 ENGINE ELECTRICAL DIAGNOSTICS LX |