Diagnosis Procedure
- CHECK STEERING FORCE CONTROL MODULE SIGNAL
CONSULT
- Ignition switch ON.
- On the CONSULT screen, select "EPS/DAST 3">>"DATA MONITOR">>"CONT MODULE INSIDE VOLT" and "BATTERY VOLTAGE".
- Check the value
Monitor item
Standard value (Approx.)
CONT MODULE INSIDE VOLT
Battery voltage - 0.6 V
BATTERY VOLTAGE
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 2.
- CHECK CONTROL MODULE GROUND CIRCUIT
- Ignition switch OFF.
- Disconnect steering force control module harness connector.
- Check the continuity between control module harness connector and ground.
Steering force control module
--
Continuity
Connector
Terminal
E142
34
Ground
Yes
Is the inspection result normal?
YES
GO TO 3.
NO
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (1)
- Ignition switch ON.
- Check the voltage between control module harness connector and ground.
Steering force control module
--
Voltage (Approx.)
Connector
Terminal
E142
33
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (2)
- Ignition switch OFF.
- Check the 60 A fusible link (No. Q).
- Check the harness for open or short between steering force control module harness connector E142 terminal 33 and the 60 A fusible link (No. Q).
Is the inspection result normal?
YES
Perform the trouble diagnosis for battery power supply circuit. Refer to appropriate system wiring diagram.
NO
Repair or replace malfunctioning component.
- CHECK INTERMITTENT INCIDENT
- Ignition switch OFF.
- Check enlarged contact spring of terminal. Refer to How to Check Terminal .
- Perform intermittent incident while turning steering wheel. Refer to Intermittent Incident .
Is the inspection result normal?
YES
Replace steering force control module. Refer to Removal and Installation .
NO
Repair or replace malfunctioning component.