NO.4 POWER ASSIST DIFFERS BETWEEN RIGHT AND LEFT TURNS

id060300801200

4

Power assist differs between right and left turns.

TROUBLESHOOTING HINTS

•  Steering gear and linkage malfunction.

•  EPS control module malfunction.

•  Poor connection of EPS control module connector, terminal damage.

•  The EPS steering angle calibration has not been completed correctly.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Have DTCs been recorded in the memory?	Yes	Perform inspection using the appropriate DTC.
1	• Have DTCs been recorded in the memory?	No	Go to the next step.
2	• Set the steering wheel in the straight ahead position. • Use the EPS data monitor function “STEER_ANGL” with the M-MDS to inspect the steering angle. • Is the steering angle within -5 to 5 degrees?	Yes	Go to the next step.
2		No	Perform the EPS steering angle calibration using the M-MDS. If the malfunction is not eliminated even after performing the EPS steering angle calibration, go to the next step.
3	• Inspect the connection of the EPS control module connector (1-pin, 1-pin, 6-pin). • Disconnect the EPS control module connector. • Inspect both the EPS control module and wiring harness-side connector for poor connection (such as damage/pulled-out pins, corrosion). • Are all the pins normal?	Yes	Replace the steering gear and linkage. (See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION.)
3		No	If poor connection of EPS control module connector: • Securely connect the EPS control module connector. If the EPS control module side connector is wrong: • Replace the steering column. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].) (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [R.H.D.].) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector. • Recheck malfunction symptoms, then replace the steering gear and linkage. (See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION.)

4	Power assist differs between right and left turns.
TROUBLESHOOTING HINTS • Steering gear and linkage malfunction. • EPS control module malfunction. • Poor connection of EPS control module connector, terminal damage. • The EPS steering angle calibration has not been completed correctly.