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3. (K41) O2 1/1 REFERENCE SIGNAL CIRCUIT SHORTED TO THE (K99) O2 1/1 HEATER CONTROL Measure the resistance between the (K41) O2 1/1 Reference Signal cir- Is the resistance above 1000.0 ohms? Yes >> Go to 4 No >> Repair the (K41) O2 1/1 Reference Signal circuit for a short to the (K99) O2 1/1 Heater Control circuit. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 4. (K41) O2 1/1 REFERENCE SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K41) O2 1/1 Reference Signal circuit Is the resistance below 10.0 ohms? Yes >> Go to 5 No >> Repair the (K41) O2 1/1 Reference Signal circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 9 - 1772 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |