Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .
Scheme 127
Scheme 128
Scheme 129
Scheme 130
Scheme 131
- Turn the ignition switch ON (II).
- Clear the DTC with the HDS.
- Check TP SENSOR A in the DATA LIST with the HDS. Is there about 4.9 V or more? YES - Go to step 4 . NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the throttle actuator control module.
- Check for Temporary DTCs or DTCs with the HDS. Are DTC P0123 and P0223 indicated at the same time? YES - Go to step 13 . NO - Go to step 5 .
- Turn the ignition switch to LOCK (0).
- Disconnect the throttle body 6P connector.
- Turn the ignition switch to ON (II).
- Measure voltage between throttle body 6P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 18 . NO - Go to step 9 .
- Turn the ignition switch to LOCK (0).
- Disconnect the throttle actuator control module 16P connector (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ).
- Connect throttle body 6P connector terminal No. 1 to body ground with a jumper wire.
- Check for continuity between throttle actuator control module 16P connector terminal No. 10 and body ground. Is there continuity? YES - Substitute a known-good throttle actuator control module (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ), then go to step 20 and recheck. If DTC P0123 is not indicated, replace the original throttle actuator control module (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ), then go to step 20 . If DTC P0123 is indicated, go to step 18 . NO - Repair open in the wire between the throttle body and the throttle actuator control module (TPSA line), then go to step 20 .
- Turn the ignition switch to LOCK (0).
- Disconnect the throttle body 6P connector.
- Disconnect the throttle actuator control module 16P connector (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ).
- Connect throttle body 6P connector terminal No. 4 to body ground with a jumper wire.
- Check for continuity between throttle actuator control module 16P connector terminal No. 9 and body ground. Is there continuity? YES - Substitute a known-good throttle actuator control module (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ), then go to step 20 and recheck. If DTC P0123 is not indicated, replace the original throttle actuator control module (see «THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT»(ref-290847-S16855799292008072200000) ), then go to step 20 . If DTC P0123 is indicated, go to step 18 . NO - Repair open in the wire between the throttle body and the throttle actuator control module (SG line), then go to step 20 .
- Turn the ignition switch to LOCK (0).
- Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-290823-S31565991452008072200000) ).
- Reconnect all connectors.
- Turn the ignition switch to ON (II).
- Reset the ECM/PCM with the HDS.
- Do «ECM/PCM IDLE LEARN PROCEDURE»(ref-290807-S02808252682008072200000) .
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P0123 indicated? YES - Check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to «INDICATED DTCS TROUBLESHOOTING»(ref-290847-S35130373092008072200000) .