DTC 27
DTC 27: ATP NP Signal InputNOTE: If the DTC 22 is stored at the same time as DTC 27, do the DTC 22 troubleshooting first, then recheck for DTC 27.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Test-drive the vehicle for more than 60 seconds, vehicle speed at 13 mph (20 km/h) or more.
5. Check for DTCs with the HDS.
Is the DTC 27 indicated?
YES - Go to step 6.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EPS control unit.
6. Turn the ignition switch OFF.
7. Disconnect the transmission range switch 10P connector.
8. Disconnect EPS control unit connector C (13P).
9. Check for continuity. between EPS control unit connector C (13P) terminal No. 8 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the EPS control unit and the transmission range switch.
NO - Go to step 10.
10. Check for continuity between transmission range switch 10P connector terminal No. 10 and EPS control unit connector C (13P) terminal No. 8.
Is there continuity?
YES - Check for poor connections or loose terminals at the EPS control unit. If necessary, substitute a known-good EPS control unit and recheck.
NO - Repair open in the wire between the EPS control unit and the transmission range switch.