DTC 73-1

DTC 73-1: MAP (Manifold Absolute Pressure) Sensor or PCM

NOTE: Before you troubleshoot, review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Clear the DTC.
3. Test-drive the vehicle, and check for DTCs with the HDS.

Is DTC 73-1 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time.

4. Check for DTCs in the PGM-FI system with the HDS. Are there any PGM-FI DTCs indicated?

YES - Go to the indicated DTCs troubleshooting.

NO - Check for poor connections or loose terminals at the VTM-4 control unit and the PCM connectors. If the connections are OK, replace the VTM-4 control unit.