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3. (K399) O2 2/2 HEATER CONTROL CIRCUIT OPEN Disconnect the C3 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the Is the resistance below 0.5 of an ohm? Yes >> Go To 4 No >> Repair the excessive resistance in the (K399) O2 2/2 Heater Control circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 4. (Z42) O2 2/2 HEATER GROUND CIRCUIT OPEN Measure the resistance between ground and the (Z42) O2 2/2 Heater Is the resistance below 0.5 of an ohm? Yes >> Go To 5 No >> Repair the excessive resistance in the (Z42) O2 2/2 Heater ground circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 5. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 182 ENGINE ELECTRICAL DIAGNOSTICS KJ |