Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 306

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-73

DTC P0758 (FLASHING CODE 32) SOLENOID 2 FAILURE (S2)

Step Action

Value(s)

Yes

No

1

1. With the engine "OFF", turn the ignition

"ON".

2. Connect a voltmeter between the TCM 20

pin connector terminal (3) and ground
terminal (15 or 19).

Is the voltage less than the specified value?

1 V

Go to Step 2

Go to Step 3

2

1. Lift the driving wheels and support them.
2. Turn the ignition "ON", and the engine "ON".

Can the speed be changed normally by
acceleration is the "NORMAL" mode and the D
range?



Go to Step 4

Go to Step 8

3

1. Turn the ignition "OFF".
2. Disconnect the TCM 20 pin connector.
3. Measure the resistance between the TCM 20

pin connector terminal (3) and ground.

Is the resistance within the specified value?

11-15

Ω (at 20°C)

Go to Step 5

Go to Step 6

4

At the 2nd speed gear.
Is the voltage between the TCM 20 pin connector
terminal (3) and ground terminal (15 or 19) within
the specified value?

8-16 V

Go to Step 7

Go to Step 8

5

The TCM is faulty or the continuity of wiring
harness is intermittent.
Was a problem found and corrected?



Go to Step 13



6

Disconnect the A/T 8 pin connector.
Is the resistance between the solenoid S2
connector terminal (3) and ground within the
specified value?

11-15

Ω (at 20°C)

Go to Step 9

Go to Step 10

7

1. Clear the TCM memory.
2. Make a running test.

Is DTC P0758 displayed by self-diagnosis?



Go to Step 5

The continuity

of wiring is

intermittent.

Refer to

"Diagnostic

aids".

8

1. Turn the ignition "OFF".
2. Disconnect the TCM 20 pin connector.
3. Measure the resistance between the TCM 20

pin connector terminal (3) and ground.

Is the resistance within the specified value?

11-15

Ω (at 20°C)

Go to Step 5

Go to Step 11

9

Check the wiring harness between the TCM 20
pin connector terminal (3) and A/T 8 pin
connector terminal (8) for ground shorted.
Was a problem found and corrected?



Go to Step 13



10

Replace the solenoid S2.
Is the replacement complete?



Go to Step 13



11

1. Disconnect the A/T 8 pin connector.
2. Measure the resistance between the A/T 8

pin connector terminal (8) and ground.

Is the resistance within the specified value?

11-15

Ω (at 20°C)

Go to Step 12

Go to Step 10

7A-74 AUTOMATIC TRANSMISSION (AW30-40LE)

DTC P0758 (FLASHING CODE 32) SOLENOID 2 FAILURE (S2) (Cont’d)

Step Action

Value(s)

Yes

No

12

Check the wiring harness between the TCM 20
pin connector terminal (3) and A/T 8 pin
connector terminal (8) for open.
Was a problem found and corrected?



Go to Step 13



13

1. After the repair is complete, use the scan tool

to select "DTC", then "Clear Info" function.

2. Make a road running test for the vehicle.
3. Review the scan tool "DTC Info".

Has the last test failed or is the current DTC
displayed?



Begin the
diagnosis

again.

Go to Step 1

System OK

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-75

DTC P1120 (FLASHING CODE 22)

PWM THROTTLE SIGNAL FAILURE (TH) (For TFR/S)

TFR/S (For Australia) and TFR (For South Africa)

D07L200008

‘01TFR (For Thailand)

D07L100003

Circuit description:

When the PWM signal of the engine throttle position
sensor located on the engine manifold (‘01TFR, For
Thailand) or accelerator pedal assembly (TFR/S) is
supplied to the TCM via the ECM, the TCM judges the
opening condition of the throttle
The shift point of th transmission is determined by this
PWM throttle signal.

Fail-safe control:

The TCM controls fail-safe by detecting PWM throttle
signal (TH) failue.

Failure detection:

• When the throttle input duty ratio is detected less

than 1

% or more than 99% for 2.0 seconds.

Contents of control:

At failure detection

• Throttle opening for line pressure control …

Throttle opening 100%

• Throttle opening for shift control … Throttle

opening 0%

• Lock-up control inhibit

• Squat control inhibit

At failure detection

7A-76 AUTOMATIC TRANSMISSION (AW30-40LE)

• Executes following items in addition to above

control items at faulure datection.

• Blinks “CHECK TRANS” lamp

• Stores the failure information in failure-memory

Conditions of turning “CHECK TRANS” lamp
off:

Trurns “CHECK TRANS” lamp off when judged 0km/h
by output revolution sensor after throttle signal input
duty ration is detected more than 1% and less than
99%.
(however, uses 0km/h judgment by back-up vehicle
apeed at output rebolution gailure)

Reversion conditions from hail-safe:

At filure detection

• Immediately recovers when the throttle input duty

ratio is detected more than 1% and less than 99%.

At filure detection

• Recovers at the same time as the conditions of

turning “CHECK TRANS” lamp off are satisfied.

Test description:

The following numbers correspond to the step numbers
on the diagnostic chart.
1. Check that the throttle input voltage is 4.4 to 4.6V.
2. At this test, check that as the throttle opens, the

voltage goes up and that the voltage reached 0.4 to
0.6V at the full open status.

6. Check the power supplu voltage (4.99-5.01V) of the

each throttle position sensors.

Diagnostic aids:

An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.