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P0175-FUEL SYSTEM 2/1 RICH (CONTINUED) 12. (K43) O2 SENSOR 2/1 SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K43) O2 Sensor 2/1 Signal circuit from Is the resistance below 5.0 ohms? Yes >> Go To 13 No >> Repair the open in the (K43) O2 Sensor 2/1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 13. (K43) O2 SENSOR 2/1 SIGNAL CIRCUIT SHORTED TO VOLTAGE Ignition on, engine not running. Leave the O2 Sensor and PCM harness connectors disconnected. Measure the voltage on the (K43) O2 Sensor 2/1 Signal circuit at the Is the voltage above 5.2 volts? Yes >> Repair the short to voltage in the (K43) O2 Sensor 2/1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 14 NOTE: Turn the ignition off before continuing. 14. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal If there are no possible causes remaining, view repair. Repair Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 1666 ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10 DR/DH |