M–84
TROUBLESHOOTING
End Of Sie
NO.3 ABNORMAL NOISE AND/OR VIBRATION FROM COUPLING COMPONENT
A6E638027100206
Diagnostic procedure
End Of Sie
6 INSPECT 4WD SOLENOID
• Inspect 4WD solenoid.
(See M–66 4WD SOLENOID INSPECTION)
• Is it okay?
Yes Inspect harness between 4WD solenoid and 4WD CM, then
go to next step.
No Replace coupling component.
STEP INSPECTION ACTION
3 Abnormal noise and/or vibration from coupling component
[TROUBLESHOOTING HINTS]
• Abnormal noise and/or vibration from coupling component during driving
• Propeller shaft is malfunctioning or attached improperly.
• Engine mount or differential mount malfunction
• Resonance of rotating parts on vehicle (engine, propeller shaft, rear differential, tire, etc.)
• Resonance with engine vibration (mainly with exhaust system parts)
• Rear differential malfunction
• Coupling component malfunction
STEP INSPECTION ACTION
1 VERIFY DSC, PCM, TCM, AND 4WD SYSTEM
DTCS
• Verify DSC, PCM, TCM, and 4WD system
DTCs using WDS or equivalent.
• Are there any DTCs present?
Yes Go to applicable DTC inspection.
No Go to next step.
2 VERIFY INSTALLATION CONDITION OF
VEHICLE PARTS
• Verify installation condition for following:
— Propeller shaft (including bending and
joint operation)
— Center bearing
— Engine mount
— Differential mount
— Hub bearing
— Exhaust system parts
— ABS wheel-speed sensor
• Are they properly installed?
Yes Go to next step.
No Repair or replace malfunctioning part.
3 DETERMINE IF MALFUNCTION IS CAUSED
BY REAR DIFFERENTIAL
• Install tires of another brand.
Note
• When tires of another brand are
installed, the same malfunction can
occur due to conditions different from
customer explanation. Be careful not
to confuse it with customer complaint.
• Perform simulation driving at the same
engine speed, gear position, and vehicle
speed that customer vehicle had
malfunction.
• Does the same malfunction occur?
Yes Reinstall customer’s vehicle tire. Go to next step.
No 4WD system is okay.
Reinstall customer’s vehicle tire.
4 INSPECT REAR DIFFERENTIAL
• Inspect rear differential for following:
— Backlash
— Teeth contact
(See M–56 REAR DIFFERENTIAL
ASSEMBLY)
• Are they okay?
Yes Replace coupling component.
No Inspect malfunctioning part and adjust it if necessary.
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