Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1869

7A2-92 DIAGNOSIS

SYMPTOM DIAGNOSIS

Symptom

Condition

Description

Oil Leak

Breather

Oil leaks from breather.

J1

Between engine and converter housing

Oil leaks between engine and converter
housing.

J2

Between converter housing and main case

Oil leaks between converter housing and
main case.

J3

Between main case and rear housing

Oil leaks between main case and rear
housing.

J4

Oil pan

Oil leaks from oil pan.

J5

Manual shaft oil seal

Oil leaks from manual shaft oil seal.

J6

Oil cooler pipe

Oil leaks from oil cooler pipe joint.

J7

Other

Transmission overheat

You smell the transmission burning.

Z1

The transmission smokes.

Mode lamp does not light up when the
power mode or 3rd start mode is turned on

The mode lamp on the instrument panel
does not light up though the power mode or
3rd start mode is turned on with the ignition
switch in ON position.

Z2

Mode lamp lights up when the power mode
or 3rd start mode is turned off

The mode lamp on the instrument panel
lights up though the power mode or 3rd start
mode is turned off with the ignition switch in
ON position.

Z3

Oil temperature warning lamp lights up

Sometimes, the oil temperature warning
lamp lights up.

Z4

Select lever feeling is faulty

Select lever feeling is faulty.

Z5

Poor fuel consumption

Poor fuel consumption.

Z6

Pattern select switch is faulty

Shift pattern does not change though the
pattern select switch is turned on.

Z7

Oil is splashed during the running

Oil is splashed during the running.

Z8

Abnormal smell

Abnormal smell.

Z9

Oil quantity is low or high

Oil quantity is low or high.

Z10

Abnormal oil pressure

Oil pressure is low or high.

Z11

Reverse buzzer does not ring

Reverse buzzer does not ring in R range.

Z12

DIAGNOSIS 7A2-93

7A2-94 DIAGNOSIS

No. A1: Vehicle Does Not Run in D, 3, 2, L and R Range

Description:

•

Vehicle does not run though the accelerator pedal is stepped on.

Diagnosis Hints:

•

Some trouble in the AT main unit is supposed (since the vehicle can run even if the TCM is defective). However,

since the trouble of the main unit may be originated from the sensor system or output system, these systems

should be also checked to prevent reproduce of the trouble.

Possible Cause:

•

Slip of clutch (low clutch, low one-way clutch, reverse clutch, low & reverse brake).

If slip of clutch is caused, a DTC (gear ratio error) is stored.

•

Shortage or faulty quality of ATF.

•

Dropped line pressure.

•

Trouble in control valve body (faulty operation, sticking, clogged oil passage).

•

Disordered select cable (select indicator light indicates D, 3, 2, L or R but the hydraulic system is not in the D, 3,

2, L, or R range).

•

Faulty torque generated.

•

Trouble in the torque converter (faulty operation, sticking), insufficient engine output.

•

Malfunction of parking mechanism.

Step

Action

Yes

No

1

Dislocation or disordered of select lever.
Does the vehicle move when the brake is released in a
position other than the P range and the vehicle is pushed?

Go to Step 2

Adjust the select cable.

2

Are any DTCs stored?

Go to DTC Chart

Go to Step 3

3

Are the quantity, contamination and smell normal?

If the ATF level is low,

replenish up to the

specified level.

Go to Step 4

If ATF is extremely

black and

contaminated and

smells burnt, slip of the

clutch is supposed.

Overhaul the AT unit.

4

Is the stall revolution correct in all range? Refer the STALL
TEST section in this manual.

Go to Step 5

Repair the defect or

replace.

5

Is the line pressure correct? Refer the LINE PRESSURE
TEST section in this manual.

Trouble in the AT

assembly or control

valve.

Repair the defect or

replace.

DIAGNOSIS 7A2-95

No. A2: Vehicle Does Not Run in R Range

Description:

•

Vehicle does not run in R range only.

•

It runs correctly in D, 3, 2, and L ranges.

Diagnosis Hints:

•

Some trouble in the AT main unit is supposed (since the vehicle can run even if the TCM is defective). However,

since the trouble of the main unit may be originated from the sensor system or output system, these systems

should be also checked to prevent reproduce of the trouble.

Possible Cause:

•

Slip of clutch (reverse clutch, low & reverse brake).

If slip of clutch is caused, a DTC (gear ratio error) is stored.

•

Shortage or faulty quality of ATF.

•

Dropped line pressure.

•

Trouble in control valve body (faulty operation, sticking, clogged oil passage).

•

Disordered select cable (select indicator light indicates R but the hydraulic system is not in the R range).

•

Faulty torque generated.

•

Trouble in the torque converter (faulty operation, sticking), insufficient engine output.

•

Malfunction of parking mechanism.

Step

Action

Yes

No

1

Dislocation or disordered of select lever.
Does the vehicle move when the brake is released in a
position other than the P range and the vehicle is pushed?

Go to Step 2

Adjust the select cable.

2

Are any DTCs stored?

Go to DTC Chart

Go to Step 3

3

Are the quantity, contamination and smell normal?

If the ATF level is low,

replenish up to the

specified level.

Go to Step 4

If ATF is extremely

black and

contaminated and

smells burnt, slip of the

clutch is supposed.

Overhaul the AT unit.

4

Is the stall revolution correct in R range? Refer the STALL
TEST section in this manual.

Go to Step 5

Repair the defect or

replace.

5

Is the line pressure correct? Refer the LINE PRESSURE
TEST section in this manual.

Trouble in the AT

assembly or control

valve.

Repair the defect or

replace.