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• When Monitored: • Set Condition: Possible Causes (F855) 5-VOLT SUPPLY CIRCUIT OPEN (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT THROTTLE POSITION SENSOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. THROTTLE POSITION SENSOR VOLTAGE BELOW 0.098 OF A VOLT Ignition on, engine not running. With a scan tool, read the TP Sensor voltage. Is the voltage below 0.098 of a volt? Yes >> Go To 2 No >> Go To 9 2. (F855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the TP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (F855) 5-volt Supply circuit in the TP Sen- Is the voltage between 4.5 to 5.2 volts? Yes >> Go To 3 No >> Go To 6 3. THROTTLE POSITION SENSOR With the a scan tool, monitor the TP Sensor voltage with the Sensor harness connector disconnected. Is the voltage above 4.5 volts? Yes >> Replace the Throttle Position Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 4 9 - 94 ENGINE ELECTRICAL DIAGNOSTICS KJ |