NO.2 TIGHT CORNER BRAKING [ELECTRONIC 4WD CONTROL SYSTEM]
id0303c6135000
|
2
|
Tight corner braking
|
|
[TROUBLESHOOTING HINTS]
• Because the coupling component locks up easily (similar to direct 4WD), rotational difference between the front and rear wheels cannot be absorbed and brake-like phenomenon occurs.
• Due to the coupling component construction, slight tight corner braking effect occurs during tight cornering on a paved road. (4WD system is normal. Compare with another same model vehicle to determine malfunction.)
• Coupling component malfunction
• 4WD solenoid malfunction
|
|
Diagnostic procedure
|
STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
VERIFY DSC, PCM, TCM, EPS, AND 4WD SYSTEM DTCS
• Verify DSC, PCM, TCM, EPS, and 4WD system DTCs using the M-MDS.
(See DTC INSPECTION [DSC HU/CM].)
• Are there any DTCs present?
|
Yes
|
Go to applicable DTC inspection.
|
|
No
|
Go to next step.
|
||
|
2
|
VERIFY TIRE AIR PRESSURE
• Inspect tire air pressure.
(See WHEEL AND TIRE SPECIFICATION.)
• Is it within specification?
|
Yes
|
Go to next step.
|
|
No
|
Adjust tire air pressure, then go to next step.
(See WHEEL AND TIRE SPECIFICATION.)
|
||
|
3
|
INSPECT ABS WHEEL-SPEED SENSOR
• Inspect ABS wheel-speed sensor.
• Is it normal?
|
Yes
|
Go to next step.
|
|
No
|
Repair or replace malfunctioning part.
|
||
|
4
|
COMPARE WITH SAME MODEL VEHICLE
• Perform simulation driving with another same model vehicle.
• Does malfunction recur on the same model vehicle?
|
Yes
|
4WD system is normal.
|
|
No
|
Go to next step.
|
||
|
5
|
TRY TO REPRODUCE MALFUNCTION BY DRIVING VEHICLE WITH 4WD SOLENOID CONNECTOR DISCONNECTED
• Switch the ignition OFF.
• Disconnect the 4WD solenoid connector.
• Try to reproduce the malfunction by driving the vehicle.
• Connect the 4WD solenoid connector.
• Clear the DTC.
• Does the malfunction recur?
|
Yes
|
Replace coupling component.
|
|
No
|
Go to next step.
|
||
|
6
|
INSPECT 4WD SOLENOID
• Inspect 4WD solenoid.
(See 4WD SOLENOID INSPECTION.)
• Is it normal?
|
Yes
|
Go to next step.
|
|
No
|
Replace coupling component.
|
||
|
7
|
INSPECT WIRING HARNESS
• Inspect the wiring harness between 4WD solenoid and 4WD control module.
• Is it normal?
|
Yes
|
Replace the 4WD control module.
|
|
No
|
Repair or replace the malfunctioning part.
|
||