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.
|
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.
|
No
|
Replace the instrument cluster.
|