Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 75

INTELLIGENT SUSPENSION

3F–21

DTC3 Actuator Coil/Position Sensor Open Circuit or Short  (Cont’d)

Step

No

Yes

Value(s)

Action

38

Is there continuity between the connector C–46
terminal 1 (GND) and the connector C–45 terminals 29,
33, 37, and 41?

—

Go to 

Step 41

Go to 

Step 39

39

Is there the continuity between connector-terminal
C45–27 and C45–35, C45–31 and C45–39, C45–32
and C45–40, and C45–34 and C45–42?

—

Go to 

Step 41

Go to 

Step 40

40

Is there the continuity between connector C–46
terminal 1 and connector C–45 terminals 27, 31, 32,
and 34?

—

Go to 

Step 41

Go to 

Step 42

41

Repair the circuit.

—

Go to 

Step 44

—

42

1. If all steps are correct, replace following units one by

one in the following order. Give a test drive and if
normal, reinstall it.
1)  actuator FR, 2)  actuator FL, rear shock
absorber, 3)  RR and 4)  RL.

Does the DTC3 remain?

—

Go to 

Step 43

Go to 

Step 44

43

Replace the control unit.

—

Go to 

Step 44

—

44

1. Reconnect all components, ensure all components

are properly mounted.

2. Clear the DTC.

Was this step finished?

—

Go to 

“Basic

Diagnosis

Flow”.

Go to 

Step 44

3F–22

INTELLIGENT SUSPENSION

DTC4 G-Sensor Open Circuit or Short

Circuit Description

The G-sensor sends the voltage (Vout) corresponding to
the vehicle vertical gravity to the control unit.
The control unit supplies DC 5V power (Vcc) to each
G-sensor.
The control unit watches the G-sensor operation through
Vcc signal.

Diagnostic Aids

D

Inspect the wiring for poor electrical connections
between the control unit connectors and the actuator
connectors. Look for possible bent, backed out,
deformed, or damaged terminals. Check for weak
terminal tension as well.
Also check for a chafed wire that could short to bare
metal or other wiring. Inspect for a broken wire inside
the insulation.

D

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

DTC4 G-Sensor Open Circuit or Short 

Step

Action

Value(s)

Yes

No

1

1. Turn off the starter switch.
2. Disconnect the connectors C–45, C–44, C–8,

C–30, and F–6.

Is there the continuity between the connector-terminal
C45–28 and C8–5, C45–30 and C30–5, and C44–45
and F6–1?

—

Go to 

Step 2

Go to 

Step 5

2

Is there continuity between the connector-terminal
C45–27 and C8–3, C45–31 and C30–3, and C44–44
and F6–2?

—

Go to 

Step 3

Go to 

Step 5

3

Is there the continuity between the connector-terminal
C45–36 and C8–2, C45–38 and C30–2, and C44–56
and F6–3?

—

Go to 

Step 4

Go to 

Step 5

4

1. Disconnect the connectors C–46, C–45, and C–44.

Is there the continuity between the connector-terminal
C45–28 and C45–35, C45–30 and C45–39, C44–45
and C44–55, C45–27 and C45–35, C45–31 and
C45–39, C44–44 and C44–55, C45–36 and C45–35,
C45–38 and C45–39, and C44–56 and C44–55?

—

Go to 

Step 5

Go to 

Step 7

5

Repair the circuit.

—

Go to 

Step 6

—

6

Replace following units one by one in the following
order. Give a test drive and if normal, reinstall it.
1)  G3-sensor 2)  Actuator FL 3)  Actuator FR 4)
Control Unit

—

Go to 

Step 7

—

7

1. Reconnect all components, ensure all components

are properly mounted.

2. Clear the DTC.

Was this step finished?

—

Go to 

“Basic

Diagnosis

Flow.”

Go to 

Step 7

INTELLIGENT SUSPENSION

3F–23

DTC5 Vehicle Speed Sensor Open Circuit or Short

Circuit Description

Output speed information is provided to the control unit by
the vehicle speed sensor. The vehicle speed sensor
produces a pulsing AC voltage. The AC voltage level and
number of pulses increases as the speed of the vehicle
increases. The control unit then converts the pulsing
voltage to vehicle speed.

Diagnostic Aids

D

Inspect the wiring for poor electrical connections
between the control unit 48 way connector and the
speed sensor connectors. Look for possible bent,
backed out, deformed, or damaged terminals. Check
for weak terminal tension as well.
Also check for a chafed wire that could short to bare
metal or other wiring. Inspect for a broken wire inside
the insulation.

D

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

DTC5 Vehicle Speed Sensor Open Circuit or Short 

Step

Action

Value(s)

Yes

No

1

1. Jack up and support the rear axle on the stand.
2. Change the transfer mode to 2WD, using TOD

switch on instrument panel.

3. Shift the transmission lever in a forward position

and rotate the rear wheels.

Does the speedo-meter operate?

—

Go to 

Step 2

Go to 

Step 3

2

1. Open the throttle and rev up engine speed.
2. Using a volt meter, measure the voltage between

the meter B connector I–23 terminals 7 and 16
(GND).

Does the voltage change alternately at the specified
values?

0V and 12V

Go to 

Step 7

Go to 

Step 5

3

1. Turn off the starter switch and disconnect the

control connectors C–46 and C–44.

2. Check the continuity between the vehicle speed

sensor connector terminal 3 and meter B connector
I–23 terminal 7.

Is there continuity?

—

Go to 

Step 4

Go to 

Step 6

4

1. Check the continuity between the control unit

connector C–46 terminal 1 and control unit
connector C–44 terminal 48.

Is there continuity?

—

Go to 

Step 5

Go to 

Step 6

5

Repair or replace the vehicle speed sensor.

—

Go to 

Step 8

—

6

Repair the circuit between the vehicle speed sensor
connector terminal 3 and the meter B connector I–23
terminal 7 or the circuit between the control unit
connector C–44 terminal 48 and the speed sensor
connector terminal 3.

—

Go to 

Step 8

—

3F–24

INTELLIGENT SUSPENSION

DTC5 Vehicle Speed Sensor Open Circuit or Short  (Cont’d)

Step

No

Yes

Value(s)

Action

7

Repair the circuit between the connector H–6 terminal
16 and the control unit connector C–44 terminal 48 or
replace the control unit.

—

Go to 

Step 8

—

8

1. Reconnect all components, ensure all components

are properly mounted.

2. Clear the DTC.

Was this step finished?

—

Go to 

“Basic

Diagnosis

Flow.”

Go to 

Step 8

About the vehicle speed sensor connector termainal 3,
Refer to section 

Wiring System in Body and Accessories.