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5. (K43) O2 2/1 SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect the PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the Is the resistance below 5.0 ohms? Yes >> Go To 6 No >> Repair the open in the (K43) O2 2/1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 6. (K902) O2 UPSTREAM RETURN CIRCUIT OPEN Measure the resistance of the (K902) O2 Upstream Return circuit from Is the resistance below 5.0 ohms? Yes >> Go To 7 No >> Repair the open in the (K902) O2 Upstream Return circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 160 ENGINE ELECTRICAL DIAGNOSTICS LX |