Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1235

8-280  ELECTRICAL-BODY AND CHASSIS 

TROUBLE SHOOTING 

QUICK CHART FOR CHECK POINTS 

Check Points  

 

Fuse 

CB-15  

Power Window 

& Door Lock 

Switch 

Door Lock 

Switch 

 

Door Lock Actuator  

 
 

Cable 

 
Trouble Mode 

(20A) Driver’s 

side 

Driver’s 

side 

Passenger’

s side 

RR-RH RR-LH

Harnes

s 

1. All the doors do not lock 

and unlock 

 

 

 

 

 

 

 

2. All the doors do not get 

locked (or unlocked) 

 

 

 

 

 

 

 

3. Driver’s side door does not 

get locked (or unlocked) 

 

 

 

 

 

 

 

4. FRT passenger’s side door 

does not get locked (or 
unlocked) 

 

 

 

 

 

 

 

5. RR door-RH does not get 

locked (or unlocked) 

 

 

 

 

 

 

 

6. RR door-LH does not get 

locked (or unlocked) 

 

 

 

 

 

 

 

7. Door lock does not operate 

when operating from the 
driver’s seat side 

 

 

 

 

 

 

 

 

ELECTRICAL-BODY AND CHASSIS  8-281 

1.  All the doors do not lock and unlock 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Reinstall or replace the fuse
No. CB-15 (20A)

Poor fuse contact or blown

NG

Repair grounding point
(

B-28

) contact

Grounding point (

B-28

)

Poor grounding point contact

Repair open circuit or
connector contact

Voltage between the driver’s
side power window & door
lock SW harness side
connector terminal 9 

D-5

and the ground (Should be
battery voltage present)

Open circuit or poor connector
contact

NG

NG

OK

OK

OK

Fuse No. CB-15 (20A, Fuse
box)

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

Replace the driver’s side
power window & door lock
SW.

Driver’s side power window &
door lock SW. function

SW. malfunction

NG

OK

Continuity between 5 

D-5

and 

B-28

 

 
 
2.  All the doors do not get locked (or unlocked) 
 

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

Replace the driver’s side
power window & door lock
SW.

Driver’s side power window &
door lock SW. function

SW. malfunction

NG

OK

Continuity between the driver’s
side power window & door
lock SW harness side
connector terminals 6 

D-5

and 8 

D-5

 

8-282  ELECTRICAL-BODY AND CHASSIS 

3.  Driver’s side door does not get locked (or unlocked) 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Replace the door lock SW.

Door lock SW. function

SW. malfunction

NG

 

 
 
4.  FRT passenger’s side door does not get locked (or unlocked) 
 

Replace the FRT passenger’s
side door lock actuator

FRT passenger’s side door
lock actuator function

Actuator malfunction

NG

 

 
 
5.  RR door-RH does not get locked (or unlocked) 
 

Replace the RR door lock
actuator-RH

RR door lock actuator-RH
function

Actuator malfunction

NG

 

 
 
6.  RR door-LH does not get locked (or unlocked) 
 

Replace the RR door lock
actuator-LH

RR door lock actuator-LH
function

Actuator malfunction

NG

 

 
 
7.  Door lock does not operate when operated from the driver’s seat side 
 

Repair grounding point
(

B-28

) contact

Poor grounding point contact

NG

Replace the door lock SW.

Continuity between the door
lock SW. side connector
terminals 1 

D-4

 and 2 

D-4

when the SW is locked and
between is unlocked 3 

D-4

and 2 

D-4

 when the SW.

SW. malfunction

NG

OK

Grounding point (

B-28

)

 

 

ELECTRICAL-BODY AND CHASSIS  8-283 

 

  REMOVAL AND INSTALLATION 

 

 

 

DRIVER SEAT SIDE POWER WINDOW & 

DOOR LOCK SWITCH 

Removal 

1.  Remove the switch by pushing the spring with the tip of a 

screwdriver. 

2.  Disconnect the connector. 
 

 
 

Installation 

To install, follow the removal steps in the reverse order. 
 

 

 

DRIVER’S SIDE DOOR LOCK SWITCH 

Removal 

1.  Door Lock ASM 

·  Refer to the removal steps of the DOORS in section 10

“BODY”. 

2.  Door Lock Switch 
 

 
 

Installation 

To install, follow the removal steps in the reverse order.