Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1145

DRIVELINE CONTROL SYSTEM

4B–13

3. When the 4WD Indicator lamp continues to blink after performing Solution 2.

Step

Action

Yes

No

1 

Check the air pressure and wear on all tires.
Were problems found?

Correct the tire 

pressure and 

replace worn tires 

then perform 

“Solution 2.”   

Go to Step 2

2 

Can the transfer lever be operated from High to 4L or vice versa?

Go to Step 3

If the motor 

actuator harness 

was disconnected, 

then repair and 

repeat step 1. 

If the motor 

actuator is 

inoperative, then 

replace the motor 

actuator and 

repeat step 1. 

If the transfer case 

was not working 

properly, then 

repair as needed 

and repeat step 1. 

3 

Confirm that the transfer switch is operating normally. Replace if
needed. 

Go to Step 4

—

4 

1. Disconnect the connector C–47.

2. Turn on the starter switch

3. Measure voltage between the connector C–47 terminals 4

and 3, when 4WD switch on instrument panel is switched on
2WD and 4WD position.

Is the motor actuator voltage on the axle as “Time Chart of
Shifting Under Normal Condition” aforementioned? Refer to the
page (4B–3).

Go to Step 8

Go to Step 5

5 

1. Inspect the wiring for poor electrical connections, open or

short to ground between the connector-terminal E56–1 and
B19–7, E57–1 and ground, C47–1 and B19–6, C47–2 and
ground, H18–1 and B19–12, B19–8 and C49–3, H17–19 and
C49–3, C49–1 and C47–4, C49–2 and C47–3, and C49–6
and ground.

2. Repair the circuit.

Is the motor actuator voltage on the axle as “Time Chart of
Shifting Under Normal Condition” aforementioned? Refer to the
page (4B–3).

Go to Step 8

Go to Step 6

6 

Check the axle switch continuity between the connector C–47
terminals 1 and 2.
Is the axle switch open or close as “Time Chart of Shifting Under
Normal Condition” aforementioned? Refer to the page (4B–3).

Go to Step 8

Go to Step 7

7 

Replace the axle motor actuator.

Go to Step 8

—

8 

Reconnect all components, ensure all components are properly
mounted.
Was this step finished

Trace this chart 

from the start.

Go to Step 8

4B–14

DRIVELINE CONTROL SYSTEM

Fault on Switching from 4WD to 2WD

1. Case that indicator dose not blink nor turn out.

Step

Action

Yes

No

1 

Does the indicator lamp turn off at ignition off?

Go to Step 2

Short circuit of the 

indicator harness.

2 

Is the 4WD switch on 2WD position?

Disconnection on 

the 4WD switch 

harness or 

breakdown of the 

4WD switch in 

open state.  Trace 
this chart from the 

start after repair or 

replace.

Turn the 4WD 

switch to 2WD 

position.  Trace this 

chart from the 

start.

DRIVELINE CONTROL SYSTEM

4B–15

2. When the indicator lamp continues to blink (at 2Hz) after performing Solution 3.

Step

Action

Yes

No

1 

Check the air pressure and wear on all tires.
Were problems found?

Perform “Solution 

3” after correcting 

the tire air pressure 

and replacing worn 

tires.

Go to Step 2

2 

Can the transfer lever be operated from High to 4L or vice versa?

If the motor 

actuator 

harness was 

disconnected, 
then repair as 

needed and 

repeat step   1.

If the transfer 

case was not 

working 

properly, then 

repair as 

needed and 

repeat step 1.

If the motor 

actuator is 

inoperative, 

then replace the 

motor actuator 

and repeat step 

1.

Go to Step 3

3 

1. Disconnect the connector C–47.

2. Turn on the starter switch

3. Measure voltage between the connector C–47 terminals 4

and 3, when 4WD switch on instrument panel is switched on
2WD and 4WD position.

Is the motor actuator voltage on the axle as “Time Chart of
Shifting Under Normal Condition” aforementioned? Refer to the
page (4B–3).

Go to Step 7

Go to Step 4

4 

1. Inspect the wiring for poor electrical connections, open or

short to ground between the connector-terminal C47–1 and
B19–6, C47–2 and ground, H18–1 and B19–12, B19–8 and
C49–3, H17–19 and C49–3, C49–1 and C47–4, C49–2 and
C47–3, and C49–6 and ground.

2. Repair the circuit.

Is the motor actuator voltage on the axle as “Time Chart of
Shifting Under Normal Condition” aforementioned? Refer to the
page (4B–3).

Go to Step 7

Go to Step 5

5 

Check the axle switch continuity between the connector C–47
terminals 1 and 2.
Is the axle switch open or close as “Time Chart of Shifting Under
Normal Condition” aforementioned? Refer to the page (4B–3).

Go to Step 7

Go to Step 6

6 

Replace the axle motor actuator.

Go to Step 7

—

7 

Reconnect all components, ensure all components are properly
mounted.
Was this step finished

Trace this chart 

from the start.

Go to Step 7

4B–16

DRIVELINE CONTROL SYSTEM

3. Case that indicator's blinking changes to 4Hz after aforementioned Solution 4 is carried out.

Step

Action

Yes

No

1 

Can the transfer lever be operated from High to 4L or vice versa?

If the motor 

actuator 

harness was 

disconnected, 
then repair as 

needed and 

repeat step   1.

If the motor 

actuator is 

inoperative, 

then replace the 

motor actuator 

and repeat step 

1.

If the transfer 

case was not 

working 

properly, then 

repair as 

needed and 

repeat step 1.

Faults on the ECU.  

Trace this chart 

from the start after 

replace.