DTC 24 - Throttle Position Sensor Voltage High - TEST FC-5A

1. Using DRB-II, read Throttle Position Sensor (TPS) voltage. If TPS voltage is greater than 4.5 volts, go to step 4). If TPS voltage is 4.5 volts or less, monitor TPS voltage on DRB-II while opening and closing throttle. If voltage change is not smooth, replace TPS. Perform TEST VER-1.
2. If voltage change is smooth, wiggle TPS connectors and harness while monitoring DRB-II. If voltage changed when harness and connectors were wiggled, repair harness or connector where wiggling caused voltage change. Perform TEST VER-1. If voltage did not change when harness and connectors were wiggled, condition required to set fault is not present at this time. THROTTLE POSITION SENSOR VOLTAGE HIGH fault sets if TPS voltage becomes greater than 4.5 volts. Possible causes are sensor output wire open, sensor ground wire open and TPS sensor failure.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary. Perform TEST VER-1. If no problems were found with wiring and connectors, see INACTIVE FAULT CONDITION. Test is complete. Perform TEST VER-1.
4. Disconnect throttle position sensor. Connect a jumper wire between TPS connector terminal No. 2, signal circuit (Orange/Dark Blue wire) and ground circuit (Black/Light Blue wire). Using DRB-II, read TPS voltage. If DRB-II displays NO RESPONSE, repair Orange/Dark Blue wire for a short to Violet/White wire. Perform TEST VER-1. If TPS voltage is less than one volt, replace throttle position sensor. Perform TEST VER-1. If TPS voltage is one volt or more, move jumper wire from Orange/Dark Blue wire to a good engine ground.
5. Using DRB-II, read TPS voltage. If voltage is less than one volt, repair open Black/Light Blue wire. Perform TEST VER-1. If voltage is one volt or more, turn ignition off. Disconnect Powertrain Control Module (PCM).
6. Using external ohmmeter, check resistance of throttle position sensor signal circuit (Orange/Dark Blue wire) between TPS connector terminal No. 2 and PCM connector terminal No. 22. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is 5 ohms or more, repair open Orange/Dark Blue wire. Perform TEST VER-1.