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3. FUSED IGNITION SWITCH START/RUN OUTPUT CIRCUIT OPEN Using a 12-volt test light connected to ground, check the Fused Ignition Turn the ignition to the Run position. Using a 12-volt test light connected to ground, check the Fused Ignition Is the test light on for both ignition switch positions? Yes >> Go To 4 No >> Repair the Fused Ignition Switch (Start/Run) Output circuit for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 4. CHECKING THE ASD RELAY SYSTEM Turn the ignition off. Connect a jumper wire between ground and the ASD Relay Control cir- Turn the ignition on. Using a 12-volt test light connected to ground, check the Fused ASD Does the test light illuminate brightly for each circuit? Yes >> Test Complete. No >> Go To 5 5. FUSED ASD RELAY BATTERY SUPPLY CIRCUIT OPEN Turn the ignition off. Remove the ASD Relay from the PDC. Using a 12-volt test light connected to ground, check both Fused ASD Is the test light on? Yes >> Go To 6 No >> Repair the Fused ASD Relay Battery Supply circuit(s) for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 9 - 654 ENGINE DIESEL DIAG KJ |