Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 1122

3F–18

INTELLIGENT SUSPENSION

DTC3 Actuator Coil/Position Sensor Open Circuit or Short

Circuit Description

The A, B, C, and D are the actuator motor coil terminals.
DC 12V driving voltage is applied between terminals A
and C and terminals B and D so that the shock absorber
oil valves are rotated at every 7.5

° step feed.

The PSW is actuator position signal and detects relative
angles between the piston-rod and the control-rod. The
actuator outputs the PSW to the control unit.

Diagnostic Aids

• Inspect the wiring for poor electrical connections

between the control unit 16 way connector 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.

• When diagnosing for a possible intermittent short or

open condition, move the wiring harness while
observing test equipment for a change.

DTC3 Actuator Coil/Position Sensor Open Circuit or Short

Step

Action

Value(s)

Yes

No

1

1. Turn off the starter switch.

2. Disconnect the actuator connectors C–50, C–45,

C–44, F–7, and F–6.

Is there continuity between the connector C–44
terminals 1 and 2?

—

Go to Step 2

Go to Step 3

2

Is there continuity between the connector C–44
terminals 3 and 4?

—

Go to Step 4

Go to Step 3

3

Replace the actuator FR.

—

Go to Step 4

—

4

Is there continuity between the connector C–45
terminals 1 and 2?

—

Go to Step 5

Go to Step 6

5

Is there continuity between the connector C–45
terminals 3 and 4?

—

Go to Step 7

Go to Step 6

6

Replace the actuator FL.

—

Go to Step 7

—

7

Is there continuity between the connector F–6
terminals 3 and 4?

—

Go to Step 8

Go to Step 9

8

Is there continuity between the connector F–6
terminals 7 and 8?

—

Go to Step 10

Go to Step 9

9

Replace the rear shock absorber RR.

—

Go to Step 10

—

10

Is there continuity between the connector F–7
terminals 3 and 4?

—

Go to Step 11

Go to Step 12

11

Is there continuity between the connector F–7
terminals 7 and 8?

—

Go to Step 13

—

12

Replace the rear shock absorber RL.

—

Go to Step 13

—

13

Is there continuity between the connector C–44
terminal 1 and connector C–50 terminal 4?

—

Go to Step 14

Go to Step 15

14

Is there continuity between the connector C–44
terminal 3 and connector C–50 terminal 17?

—

Go to Step 16

Go to Step 15

15

Repair the circuit.

—

Go to Step 16

—

16

Is there continuity between the connector C–44
terminal 2 and connector C–50 terminal 5?

—

Go to Step 17

Go to Step 18

INTELLIGENT SUSPENSION

3F–19

17

Is there continuity between the connector C–44
terminals 4 and connector C–50 terminal 18?

—

Go to Step 19

Go to Step 18

18

Repair the circuit.

—

Go to Step 19

—

19

Is there continuity between the connector C–45
terminal 1 and connector C–50 terminal 6?

—

Go to Step 20

Go to Step 21

20

Is there continuity between the connector C–45
terminal 3 and connector C–50 terminal 19?

—

Go to Step 22

Go to Step 21

21

Repair the circuit.

—

Go to Step 22

—

22

Is there continuity between the connector C–45
terminal 2 and connector C–50 terminal 7?

—

Go to Step 23

Go to Step 24

23

Is there continuity between the connector C–45
terminal 4 and connector C–50 terminal 20?

—

Go to Step 25

Go to Step 24

24

Repair the circuit.

—

Go to Step 25

—

25

Is there continuity between the connector F–6 terminal
4 and connector C–50 terminal 8?

—

Go to Step 26

Go to Step 27

26

Is there continuity between the connector F–6 terminal
8 and connector C–50 terminal 21?

—

Go to Step 28

Go to Step 27

27

Repair the circuit.

—

Go to Step 28

—

28

Is there continuity between the connector F–6 terminal
3 and connector C–50 terminal 9?

—

Go to Step 29

Go to Step 30

29

Is there continuity between the connector F–6 terminal
7 and connector C–50 terminal 22?

—

Go to Step 31

Go to Step 30

30

Repair the circuit.

—

Go to Step 31

—

31

Is there continuity between the connector F–7 terminal
4 and connector C–50 terminal 10?

—

Go to Step 32

Go to Step 33

32

Is there continuity between the connector F–7 terminal
8 and connector C–50 terminal 23?

—

Go to Step 34

Go to Step 33

33

Repair the circuit.

—

Go to Step 34

—

34

Is there continuity between the connector F–7 terminal
3 and connector C–50 terminal 11?

—

Go to Step 35

Go to Step 36

35

Is there continuity between the connector F–7 terminal
7 and connector C–50 terminal 24?

—

Go to Step 37

Go to Step 36

36

Repair the circuit.

—

Go to Step 37

—

37

1. Disconnect the terminals C–51, C–43, C–46, F–6,

and F–7.

Is there continuity between the connector–terminal
C51–29 and C43–6, C51–37 and C46–6, C51–33 and
F6–2, C51–41 and F7–2?

—

Go to Step 38

Go to Step 41

38

Is there continuity between the connector C–50
terminal 1 (GND) and the connector C–51 terminals
29, 33, 37, and 41?

—

Go to Step 41

Go to Step 39

39

Is there the continuity between connector-terminal
C51–27 and C51–35, C51–31 and C51–39, C51–32
and C51–40, and C51–34 and C51–42?

—

Go to Step 41

Go to Step 40

Step

Action

Value(s)

Yes

No

3F–20

INTELLIGENT SUSPENSION

40

Is there the continuity between connector C–50
terminal 1 and connector C–51 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, 3) rear shock
absorber, RR and 4) rear shock absorber 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

Step

Action

Value(s)

Yes

No

INTELLIGENT SUSPENSION

3F–21

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

• 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.

• 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–51, C–52, C–43, C–

46, and F–5.

Is there the continuity between the connector-terminal
C51–28 and C43–5, C51–30 and C46–5, and C52–45
and F5–1?

—

Go to Step 2

Go to Step 5

2

Is there continuity between the connector-terminal
C51–27 and C43–3, C51–31 and C46–3, and C52–44
and F5–2?

—

Go to Step 3

Go to Step 5

3

Is there the continuity between the connector-terminal
C51–36 and C43–2, C51–38 and C46–2, and C52–56
and F5–3?

—

Go to Step 4

Go to Step 5

4

1. Disconnect the connectors C–50, C–51, and C–

52.

Is there the continuity between the connector-terminal
C51–28 and C51–35, C51–30 and C51–39, C52–45
and C52–55, C51–27 and C51–35, C51–31 and C51–
39, C52–44 and C52–55, C51–36 and C51–35, C51–
38 and C51–39, and C52–56 and C52–55?

—

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