Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1230

8-260  ELECTRICAL-BODY AND CHASSIS 

Low Fuel Indicator Light Inspection 

1.  Disconnect the fuel tank unit wire connector. 
2.  Connect between terminal (YL) and (B). 
3.  Turn the key switch on. Check that the bulb lights. 
If operation is not correct, remove and check the bulb or circuit.

 

 
 
 
 
 

Check level sensor operation 

1.  Remove the fuel tank unit. 
2.  Apply battery voltage between terminal (YL) and (B) through 

a 3.4 watt bulb. Check that the bulb lights. 

Note: 
It will take a short time for the bulb light. 
3.  Submerge the sensor in fuel. Check that the bulb goes out.
If operation is not correct, replace the fuel tank unit. 
 

BRAKE SYSTEM WARNING LIGHT 

The brake system warning light comes on while the parking 
brake is set and the starter key is ON position. 
Note: 
The parking brake indicator light circuit is designed to 
prevent driving of the vehicle with the parking brake on. 
It does not indicate the condition of the parking brake 
system. 
 

 

 
 

The parking brake switch is in parallel with the brake fluid 
switch. 
 

 

 
 

The brake system warning light also comes on when reservoir 
brake fluid level falls below the specified limit with the parking 
brake released and the starter switch is ON position. 
 

ELECTRICAL-BODY AND CHASSIS  8-261 

 

 

VEHICLE SPEED SENSOR 

(INCORPORATED IN THE 

SPEEDOMETER) 

 

 

Vehicle Speed Sensor Inspection 

Remove the speedometer from the meter assembly and 
measure the resistance value between the terminals. 
 

 
 

 

Speed Sensor Resistance 

Tester

Terminal

terminal

symbol

Red (+) Black (-) Black (-) Red (+)

4P

GND

4P

GND

13.5 - 16.5k

¥

4P - GND

 
Note: Use the analog type circuit tester. 
 

 

 
 

VEHICLE SPEED SENSOR (INSTALLED 

ON THE TRANSMISSION) 

The speed sensor is installed on the rear portion of the 
transmission. 
The number of pulses generated is four pulses per one rotation 
of the pinion shaft. 
 

MUA T/M

 

 
 

 

8-262  ELECTRICAL-BODY AND CHASSIS 

 

 

Vehicle Speed Sensor Inspection 

1. Connect the vehicle speed sensor connector 1 

M-10

(Diesel engine: 1 

E-44

 )  to the battery (+) terminal and 2 

M-10

 (Diesel engine: 2 

E-44

 ) to the (-) terminal. 

2. Connect a resistance of 1.3K ohm to 5K ohm (1/4 W or

more) between connectors 1 

M-10

. (Diesel engine: 1 

E-44

 )

and 3 

M-10

 (Diesel engine: 3 

E-44

 ) 

 
 

CAUTION: 
Be extremely careful not to connect the battery (+) 
terminal to the connector 3 

M-10

 (Diesel engine: 3 

E-44

 ).

This may damage the vehicle speed sensor. 
 

 
 

3. Rotate the shaft of the vehicle speed sensor slowly and

measure the voltage at the both ends with a digital tester. 

 
The voltage, with one rotation of shaft fluctuates four times in 
the following range: 10 to 14V - 2V or less. 
 

 

ELECTRICAL-BODY AND CHASSIS  8-263 

Timing Belt Indicator Light Reset Procedure (4 Diesel Engine) 

Masking tape

A

B

W/ Tachometer

Masking tape

W/O Tachometer

A

B

 

 
Timing belt must be replaced after 100,000 km of vehicle operation. 
When the odometer reading reaches 100,000 km, the timing belt indicator light will turn on to remind the driver to 
change the timing belt. 
After replacing the timing belt, the timing belt indicator light must be reset to remind the driver to replace the timing 
belt after the next 100,000 km.