## EPS Components

#### DTC Troubleshooting (cont'd)

17-80

DTC 22: Vehicle Speed Sensor Signal DTC 23: Engine Speed Signal NOTE:

- Information marked with an asterisk (*) applies to CVT model.
- If the MIL indicator is ON, troubleshoot the PGM-FI system first.
- When the engine is running at 2,000 rpm (min-1) or above and the vehicle speed is 1 km/h (0. 62 mph) or below for 6 minutes the EPS indicator comes on.
- When the vehicle speed is 10 km/h (6.2 mph) or above and the engine is running at 280 rpm (min-1) or below for 3 seconds, the EPS indicator comes on.

1. Start the engine and check the tachometer.

Is the tachometer working correctly?

YES - Go to step 2.

NO - Go to step 10.

2. Test-drive the vehicle above 15 km/h (9.3 mph).

Is the speedometer working correctly?

YES - Go to step 3.

NO - Perform the speedometer system troubleshooting (see page 22-94).

3. Turn the ignition switch OFF.
4. Disconnect the VSS 3P connector (ECM/PCM connector E, 31P)* and EPS control unit connector C (20P).
5. Check for continuity between the EPS control unit connector C (20P) terminal No. 7 and body ground.

   EPS CONTROL UNIT CONNECTOR C (20P)

Wire side of female terminals

Is there continuity?

YES - Repair short to body ground in the wire between the VSS (ECM/PCM)* and EPS control unit.

NO - Go to step 6.

6. Connect the VSS 3P connector (ECM/PCM connector E, 31P)*.

7. Block the rear wheels and raise the vehicle, and make sure it is securely supported.
8. Turn the ignition switch ON (II).
9. Block the right front wheel, and slowly rotate the left front wheel, and measure the voltage between the EPS control unit connector C (20P) terminal No. 7 and body ground.

   EPS CONTROL UNIT CONNECTOR C (20P)

Wire side of female terminals

Does the voltage pulse 0 V and 5 V?

YES - Check for loose EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck.

NO - Repair open in the wire between the EPS control unit and VSS (ECM/PCM)* or faulty the VSS (ECM/PCM)*.

10. Turn the ignition switch OFF, and disconnect the EPS control unit connector C (20P).
11. Start the engine, and let it idle.
12. Measure the voltage between the EPS control unit connector C (20P) terminal No. 19 and body ground.

    EPS CONTROL UNIT CONNECTOR C (20P)

Wire side of female terminals

Is there about 6 V at idle?

YES - Check for loose EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck.

NO - Go to step 13.