No.3 ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) WARNING LIGHT ILLUMINATES

id060300201000

3

Power steering malfunction indicator light illuminates
POSSIBLE CAUSE
•  EHPAS system malfunction
•  SAS 15 A fuse malfunction
•  ABS IG 7.5 A fuse malfunction
•  Short to ground or open circuit in wiring harness between battery and EHPAS control module terminal 2F
•  Open circuit in EHPAS control module ground circuit
•  Instrument cluster malfunction
•  EHPAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
CONFIRM EHPAS DTC
•  Retrieve the EHPAS DTC using the M-MDS (IDS).
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS.)
No
Go to the next step.
2
INSPECT SAS 15 A/ABS IG 7.5 A FUSE
•  Switch the ignition to off.
•  Inspect the SAS 15 A fuse.
•  Inspect the ABS IG 7.5 A fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
If the fuse is melt:
•  Repair or replace the wiring harness between SAS 15 A fuse and ABS IG 7.5 A fuse.
•  Repair or replace the wiring harness between ABS IG 7.5 A fuse and EHPAS control module terminal 2F.
•  Replace the fuse.
If the fuse is deterioration:
•  Replace the fuse.
3
INSPECT EHPAS CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to ON.
•  Measure the voltage at the EHPAS control module terminal 2F (wiring harness-side).
•  Is the voltage normal?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit.
4
INSPECT EHPAS CONTROL MODULE GROUND CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to off.
•  Disconnect the EHPAS control module connector.
•  Inspect for continuity between EHPAS control module terminal 1A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Inspect the wiring harness for open circuit and ground point.
Repair or replace the malfunctioning part according to the inspection result.
5
VERIFY WHETHER MALFUNCTION IS IN EHPAS CONTROL MODULE OR INSTRUMENT CLUSTER
•  Turn off all warning light and indicator lights using the instrument cluster PID WL+IL of active command modes.
•  Does the power steering malfunction indicator light turn off?
Yes
Replace the EHPAS control module.
(See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) CONTROL MODULE CONFIGURATION.)
No
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)