Preliminary Check

DIAGNOSIS AND REPAIR WORK FLOW


Preliminary Check


TRANSFER FLUID CHECK
Check for leaks and fluid level. Inspection.

PREPARATION FOR ROAD TEST





The purpose of the test is to determine overall performance of transfer case and analyze causes of malfunctions.
When a malfunction is found in any part of transfer, perform the road test to locate the malfunction area and repair the malfunction parts.
The road test consists of the following three parts.
1. CHECK BEFORE ENGINE IS STARTED
2. CHECK AT IDLE
3. CRUISE TEST

CHECK BEFORE ENGINE IS STARTED
1.CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to OFF position.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to 2WD position.
5. Turn ignition switch to ON position. (Do not start engine.)
Does 4WD shift indicator lamp turn ON for approximately 1 second?
YES - GO TO 2.
NO - GO TO 4WD Shift Indicator Lamp and 4LO Indicator Lamp Do Not Turn On.
2.CHECK 4WD WARNING LAMP
1. Turn ignition switch to OFF position.
2. Move A/T selector lever to P position.
3. Set 4WD shift switch to 2WD position.
4. Turn ignition switch to ON position. (Do not start engine.)
Does 4WD warning lamp turn ON?
YES - GO TO CHECK AT IDLE.
NO - GO TO 4WD Warning Lamp Does Not Turn On.

CHECK AT IDLE
1.CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface and engage the parking brake.
2. Turn ignition switch to OFF position.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to 2WD position.
5. Start engine.
Does 4WD shift indicator lamp turn ON?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK 4WD WARNING LAMP
Check 4WD warning lamp state.
Is 4WD warning lamp turned ON?
YES - Perform the self-diagnosis. Scan Tool Testing and Procedures.
NO - 4WD Shift Indicator Lamp or 4LO Indicator Lamp Do Not Change.
3.CHECK 4WD SHIFT INDICATOR AND 4LO INDICATOR OPERATION





1. Brake pedal depressed.
2. Move A/T selector lever to N position.
3. Set 4WD shift switch to 2WD, AUTO, 4H, 4LO, 4H, AUTO and
2WD in order. (Stay at each switch position for at least 1 second.)
Do 4WD shift indicator and 4LO indicator lamps change properly?
Does buzzer sound?
YES - GO TO CRUISE TEST.
NO - GO TO 4WD Shift Indicator Lamp or 4LO Indicator Lamp Do Not Change.

CRUISE TEST
1.CHECK INPUT SIGNAL
1. Warm up engine to normal operating temperature.
2. Park vehicle on flat surface.
3. Move A/T selector lever to P position.
4. Set 4WD shift switch to AUTO position.
5. Start engine.
6. Drive vehicle for at least 30 seconds at a speed higher than 20 km/h (12 MPH).
Is 4WD warning lamp turned ON?
On steady-Perform the self-diagnosis. Scan Tool Testing and Procedures.
Flash rapidly- 4WD Warning Lamp Flashes Rapidly.
Flash slowly- 4WD Warning Lamp Flashes Slowly.
NO - GO TO 2.
2.CHECK TIGHT CORNER BRAKING SYMPTOM (1)
1. Set 4WD shift switch to AUTO position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES - GO TO Heavy Tight-Corner Braking Symptom Occurs.
NO - GO TO 3.
3.CHECK TIGHT CORNER BRAKING SYMPTOM (2)
1. Set 4WD shift switch to 4HI position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES - Inspection End.
NO - GO TO 4WD System Does Not Operate.