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P1115-GENERAL TEMPERATURE RATIONALITY (CONTINUED) 3. TEMPERATURE SENSOR Ignition on, engine not running. Disconnect the suspected sensor. Connect a jumper wire between the Sensor Signal circuit and the (K900) Sensor ground circuit. With the scan tool, read the voltage of the suspected Sensor. Did the voltage reading start at 4.8 to 5.0 volts and decrease to 0 volts when the jumper wire was Yes >> Replace the Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 4 NOTE: Remove the jumper wire before continuing. 4. EXCESSIVE RESISTANCE IN THE TEMPERATURE SENSOR SIGNAL CIRCUIT Turn the ignition off. Disconnect the PCM harness connectors. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage Is the resistance above 5.0 ohms. Yes >> Repair the excessive resistance in the Temperature Sensor Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 5 5. EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT Measure the resistance of the (K900) Sensor ground circuit from the Is the resistance above 5.0 ohms. Yes >> Repair the excessive resistance in the (K900) Sensor ground circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 6 HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 751 |