| Condition | Possible Cause | Action |
|---|---|---|
|
4WD control system does not operate (4WD indicator or 4WD low indicator does not flash and warning buzzer does not sound)
|
“2WD” switch, “4WD” switch and/or “4WD-L” switch faulty
|
Check switch(es) referring to
2WD/4WD Switch Inspection
.
|
|
Transfer shift actuator motor and/or transfer shift actuator limit switch faulty
|
Check transfer shift actuator referring to
Transfer Shift Actuator Inspection
.
|
|
|
4WD switch and/or 4WD low switch faulty
|
Check switch(es) referring to
4WD Switch and 4WD Low Switch Inspection
.
|
|
|
Wiring or grounding faulty
|
Repair as necessary.
|
|
|
4WD control module faulty
|
Check 4WD control module referring to
Inspection of 4WD Control Module and Its Circuits
.
|
| Condition | Possible Cause | Action |
|---|---|---|
|
Transfer refuses to operate (4WD indicator or 4WD low indicator flashes, and then transfer does not shift.)
|
Transfer shift actuator faulty
|
Check transfer shift actuator referring to
Transfer Shift Actuator Inspection
.
|
|
4WD switch and/or 4WD low switch faulty
|
Check switch(es) referring to
4WD Switch and 4WD Low Switch Inspection
.
|
|
|
Distorted shift shaft or shift fork
|
Check shift fork referring to
Transfer Inspection
.
|
|
|
Worn synchronizer ring
|
Check synchronizer ring referring to
Transfer Inspection
.
|
|
|
Worn chamfered tooth on sleeve or gear
|
Check chamfered tooth and gear referring to
Transfer Inspection
.
|
|
|
Distorted shift shaft
|
Check shift shaft referring to
Transfer Inspection
.
|
|
|
Wiring or grounding faulty
|
Repair as necessary.
|
|
|
4WD control module faulty
|
Check 4WD control module referring to
Inspection of 4WD Control Module and Its Circuits
.
|
|
|
Warning buzzer does not sound although transfer operates normally
|
Wiring or grounding faulty
|
Repair as necessary.
|
|
4WD control module faulty
|
Check 4WD control module referring to
Inspection of 4WD Control Module and Its Circuits
.
|
|
|
Air lock hub does not lock/unlock
|
4WD switch faulty
|
Check 4WD switch referring to
4WD Switch and 4WD Low Switch Inspection
.
|
|
Wiring or grounding faulty
|
Repair as necessary.
|
|
|
Defective air locking hub assembly
|
Replace.
|
|
|
Abnormality in 4WD control system
|
Inspect referring to
4WD Control System Check
.
|
|
|
Air leakage from vacuum circuit
|
Check and replace.
|
|
|
Clogged vacuum hose or pipe
|
Replace.
|
|
|
Defective check valve or vacuum tank (M13A engine model)
|
Replace.
|
|
|
Defective vacuum control valve (K9K engine model)
|
Replace.
|
|
|
Defective vacuum pump (K9K engine model)
|
Check and replace.
|
|
|
Gear slipping out of mesh
|
Worn shift fork shaft No.1 and/or No.2
|
Check shift fork shaft No.1 and/or No.2 referring to
Transfer Inspection
.
|
|
Worn shift fork and/or sleeve
|
Check shift fork and/or sleeve referring to
Transfer Inspection
.
|
|
|
Weak or damaged locating spring
|
Check locating spring referring to
Transfer Inspection
.
|
|
|
Worn bearings on input shaft and/or output shaft
|
Check bearing referring to
Transfer Inspection
.
|
|
|
Worn chamfered tooth on sleeve or gear
|
Check sleeve and gear referring to
Transfer Inspection
.
|
|
|
Missing or disengagement of circlip(s)
|
Check circlip(s) referring to
Transfer Inspection
.
|
|
|
Noise
|
Inadequate or insufficient lubricant
|
Replenish transfer oil referring to
Transfer Gear Oil Change
.
|
|
Damaged or worn bearing(s)
|
Check bearing(s) referring to
Transfer Inspection
.
|
|
|
Damaged or worn gear(s)
|
Check gear(s) referring to
Transfer Inspection
.
|
|
|
Damaged or worn synchronizer ring(s)
|
Check synchronizer ring(s) referring to
Transfer Inspection
.
|
|
|
Damaged or worn chamfered tooth on sleeve(s) and/or gear(s)
|
Check sleeve(s) and/or gear(s) referring to
Transfer Inspection
.
|
|
|
Defective front differential
|
Check front differential referring to
Front Differential Symptom Diagnosis:Front
.
|