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6. (K43) O2 2/1 SIGNAL CIRCUIT SHORTED TO (K902) O2 UPSTREAM RETURN CIRCUIT Measure the resistance between the (K43) O2 2/1 Signal circuit and the Is the resistance below 100 ohms? Yes >> Repair the short between the (K902) O2 Upstream Return circuit and the (K43) O2 2/1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 7 7. (K43) O2 2/1 SIGNAL CIRCUIT SHORTED TO (Z904) HEATER GROUND CIRCUIT Measure the resistance between the (K43) O2 2/1 Signal circuit and the Is the resistance below 100 ohms? Yes >> Repair the short between the (Z904) O2 Heater ground cir- cuit and the (K43) O2 2/1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 8 8. 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 - 156 ENGINE ELECTRICAL DIAGNOSTICS LX |