Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1855

7A2-36 DIAGNOSIS

DTC P0727 (Flash Code 13) Engine Revolution Sensor No Signal

RED

TDC

Sensor

TCM

A7

C94

(7)

BLK/RED

WHT

C56

(27)

E9

(1)

(2)

(3)

C57

(98)

(90)

(101)

ECM

C56 (ECM-A)

Setting Condition:

•

The engine speed becomes 0 rpm for 2 seconds while the vehicle is running at the over 40 km/h.

Fail Safe:

•

Lock-up is inhibited.

Possible Cause:

•

Crank position sensor malfunction.

•

Sensor wheel (flywheel) malfunction.

•

Large sensing gap between speed sensor and sensor wheel (flywheel).

•

Faulty input signal from crank position sensor to ECM.

•

Signal wire open circuit or short circuit to battery between ECM A24 and TCM terminal A7 (C94).

•

Poor connection of each connector.

Reference:
When the engine speed 1500rpm, following signal is outputted.
Measurement terminal: A7 (C94) and B5 (C95)

DIAGNOSIS 7A2-37

Engine Speed Sensor Reference Wave Form

Measurement Terminal: A7 (+)

B5(-)

Measurement Scale: 5V/div

20ms/div

Measurement Condition: At engine speed 1500rpm

7A2-38 DIAGNOSIS

DTC P0717 (Flash Code 14) Turbine Speed Sensor No Signal

Turbine

Sensor

TCM

B3

H23

(9)

C95

(3)

E31

(2)

(1)

(3)

E10

Key SW

BRN/RED

WHT

BLK

BRN/RED

Speed Sensor

Turbine Sensor

Setting Condition:

•

The turbine speed below 300 rpm for 2 seconds while the vehicle is running at the speed over 40 km/h with the

engine speed over 1500 rpm in the 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:

•

Turbine speed sensor malfunction.

•

Sensor wheel (reverse & high clutch drum) malfunction.

•

Large sensing gap between speed sensor and sensor wheel (reverse & high clutch drum).

•

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

1 and TCM terminal B3 (C95).

DIAGNOSIS 7A2-39

•

Sensor wire open circuit or short circuit to ground between turbine speed sensor terminal 2 and power supply

circuit.

•

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

•

Poor connection of each connector.

Reference:
When the vehicle speed 20km/h at L range in 1st gear, following signal is outputted.
Measurement terminal: B3 (C95) and B5 (C95)
-AC range by circuit tester: Approximately 6.2 V

Turbine Sensor Reference Wave Form

Measurement Terminal: B3 (+)

B5 (-)

Measurement Scale: 5V/div

500ms/div

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