Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1854

7A2-32  DIAGNOSIS

 

 

 

Flash Code 

(P-Code) 

 

CHECK TRANS Flash Pattern 

 

Description 

CHECK 

TRANS 

Warning

 

                                               

 

 

34 (P0768) 

                                               

Low Clutch Duty Solenoid Failure

ON 

 

                                               

 

 

 

                                               

 

 

35 (P0748) 

                                               

Line Pressure Solenoid Failure 

ON 

 

                                               

 

 

 

                                               

 

 

36 (P1860) 

                                               

Lock-up Duty Solenoid Failure 

ON 

 

                                               

 

 

 

                                               

 

 

41 (P0731) 

                                               

1stGearRatioError 

ON 

 

                                               

 

 

 

                                               

 

 

42 (P0732) 

                                               

2ndGearRatioError 

ON 

 

                                               

 

 

 

                                               

 

 

43 (P0733) 

                                               

3rdGearRatioError 

ON 

 

                                               

 

 

 

                                               

 

 

44 (P0734) 

                                               

4thGearRatioError 

ON 

 

                                               

 

 

 

                                               

 

51 (P1750) 

                                               

ON 

 

                                               

Low & Reverse Brake Fail-safe 
Valve Failure

 

 

 

                                               

 

 

52 (P1755) 

                                               

2-4BrakeFail-safeValveFailure 

ON 

 

                                               

 

 

 

                                               

 

 

- (P0602) 

No Flash Code 

Programming Error 

ON 

 

                                               

 

 

 

DIAGNOSIS  7A2-33

 

FAIL-SAFEFUNCTION 

 

 

 

Fail-Safe Condition 

Flash Code 

(P-Code) 

 

Description 

CHECK 

TRANS 

Warning

 

 

Gear 

Shift 

Solenoid

Line 

Pressure 

Solenoid 

 

Lock-up 

 

Remark 

11

 

(P0722) 

Vehicle peed Sensor No 
Signal 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

13

 

(P0727) 

Engine Revolution Sensor 
No Signal 

ON 

- 

- 

- 

Inhibited 

 

14

 

(P0717) 

Turbine Speed Sensor No 
Signal 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

15

 

(P0710) 

ATF Temperature Sensor 
Failure 

OFF 

3,2,L 

- 

- 

Inhibited 

*1 

16

 

(P0560) 

System Voltage Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

*2 

17

 

(P0705) 

Inhibitor Switch Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

22

 

(P1120) 

Throttle Signal Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

25

 

(P1875) 

GND Return Circuit 
Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

*2 

26

 

(P1853) 

Low & Reverse Brake 
Pressure Switch Failure 

ON 

No Fail-safe Function 

 

27

 

(P1858) 

2-4 Brake Pressure 
Switch Failure 

ON 

No Fail-safe Function 

 

28

 

(P1863) 

High Clutch Pressure 
Switch Failure 

ON 

No Fail-safe Function 

 

31

 

(P0753) 

Low & Reverse Brake 
Duty Solenoid Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

32

 

(P0758) 

2-4 Brake Duty Solenoid 
Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

33

 

(P0763) 

High Clutch Duty Solenoid 
Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

34

 

(P0768) 

Low Clutch Duty Solenoid 
Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

35

 

(P0748) 

Line Pressure Solenoid 
Failure 

ON 

- 

-

 

Stop 

- 

 

36

 

(P1860) 

Lock-up Duty Solenoid 
Failure 

ON 

- 

- 

- 

Inhibited 

 

41

 

(P0731) 

1stGearRatioError 

ON 

No Fail-safe Function 

 

42

 

(P0732) 

2ndGearRatioError 

ON 

No Fail-safe Function 

 

43

 

(P0733) 

3rdGearRatioError 

ON 

No Fail-safe Function 

 

44

 

(P0734) 

4thGearRatioError 

ON 

No Fail-safe Function 

 

51

 

(P1750) 

Low & Reverse Brake 
Fail-safe Valve Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

52

 

(P1755) 

2-4 Brake Fail-safe Valve 
Failure 

ON 

3rdFix 

All Stop 

- 

Inhibited 

 

-

 

(P0602) 

Programming Error 

ON 

No Fail-safe Function 

 

*1: When the engine speed is more than 470 rpm for 10 minuets, the lock-up and gear shift to 4th (over-drive) are 

allowed. 

*2: In case of fail-safe valve failure, gear shift to 4th (over-drive) is inhibited. 

7A2-34  DIAGNOSIS

 

DTC P0722 (Flash Code 11) Vehicle Speed Sensor No Signal 

 

 

Speed 

Sensor

 

TCM 

 
 
 

B13 

H23

(4)

C95
(13)

E30

(2)
(1)
(3)

E10 

Key SW 

YEL/RED

 BLK 

YEL/RED 

 

 

Speed Sensor 

Turbine Sensor 

 
Setting Condition: 

•

  When the vehicle speed exceeds 5 km/h with the turbine speed over 1000 rpm for 5 seconds, after 25.5 

seconds elapsed in D, 3, 2 or L range. 

 
Fail Safe: 

•

  When the vehicle is running, the gear position selected at the trouble detection is held and the lock-up is 

inhibited. 

•

  After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd. 

 
Possible Cause: 

•

  Speed sensor malfunction. 

•

  Sensor wheel (parking gear) malfunction. 

•

  Large sensing gap between speed sensor and sensor wheel (parking gear). 

•

  Sensor wire open circuit, short circuit to battery or short circuit to ground between speed sensor terminal 1 and 

TCM terminal B13 (C95). 

•

  Sensor wire open circuit or short circuit to ground of the harness between speed sensor terminal 2 and power 

supply circuit. 

•

  Sensor wire open circuit or short circuit to battery between speed sensor terminal 3 and ground circuit. 

DIAGNOSIS  7A2-35

 

•

  Poor connection of each connector. 

 
Reference: 
When the vehicle speed 20km/h at L range in 1st gear, following signal is outputted. 
Measurement terminal: B13 (C95) and B5 (C95)  
-AC range by circuit tester: Approximately 6.2 V 

 

 

 

Vehicle Speed Sensor Reference Wave Form 

 

 

Measurement Terminal: B13 (+) 

B5 (-) 

Measurement Scale: 5V/div 

2ms/div 

Measurement Condition: Vehicle speed 20km/h at L range in 1st gear