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Pin 03
Negative terminal
Is the resistance less than 10,000 ohms? -> Yes REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
-> No INSTALL a new H02S. Heated Oxygen Sensor (HO2S) CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, refer to the warranty policy and procedures manual if an ECM is suspect. PINPOINT TEST G531332p7 : RIGHT- G531332t23 : CHECK H02S HEATER POWER SUPPLY CIRCUIT 1. Key off. 2. Disconnect the H02S electrical connector, PI10. 3. Key on, engine off. 4. Make sure the O2S heater relay is engaged. 5. Measure the voltage between: HO2S connector PI10, harness side Battery
Pin 01
Negative terminal
Is the voltage greater than 10 volts? -> Yes GO to Pinpoint Test G531332t24.
-> No REPAIR the power supply circuit to the H02S heater. This circuit includes the HO2S heater relay, fuse 34 of the front power distribution box, and the high power protection module. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation. G531332t24 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR 1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Measure the resistance between: |