Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 74

INTELLIGENT SUSPENSION

3F–17

DTC2 Actuator Coil Over Current

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.

Diagnostic Aids

Inspect the wiring for poor electrical connections
between the control unit 24 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.

DTC2 Actuator Coil Over Current

Step

Action

Value(s)

Yes

1. Turn off the starter switch.
2. Disconnect the actuator connectors C–31, C–9,

F–8, and F–7.

3. Measure the resistance between the actuator side

connector C–9 terminals 1 and 2.

Is the resistance within the specified value?

6.4– 7.2

Go to

Step 2

Go to

Step 3

1. Measure the resistance between the actuator side

connector C–9 terminals 3 and 4.

Is the resistance within the specified value?

6.4– 7.2

Go to

Step 4

Go to

Step 3

Replace the actuator FR.

—

Go to

Step 4

—

1. Measure the resistance between the actuator side

connector C–31 terminals 1 and 2.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 5

Go to

Step 6

1. Measure the resistance between the actuator side

connector C–31 terminals 3 and 4.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 7

Go to

Step 6

Replace the actuator FL.

—

Go to

Step 7

—

1. Measure the resistance between the shock

absorber side connector F–7 terminals 3 and 4.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 8

Go to

Step 9

1. Measure the resistance between the shock

absorber side connector F–7 terminals 7 and 8.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 10

Go to

Step 9

Replace the rear shock absorber RR.

—

Go to

Step 10

—

1. Measure the resistance between the shock

absorber side connector F–8 terminals 3 and 4.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 11

Go to

Step 12

1. Measure the resistance between the shock

absorber side connector F–8 terminals 7 and 8.

Is the resistance within the specified value?

6.4–7.2

Go to

Step 13

Go to

Step 12

3F–18

INTELLIGENT SUSPENSION

DTC2 Actuator Coil Over Current (Cont’d)

Step

Yes

Value(s)

Action

Replace the rear shock absorber RL.

—

Go to

Step 16

—

If all steps are correct, check the continuity between the
control unit connector C–46 terminal 1 and connector
terminal C46–4, C46–17, C46–5, C46–18, C46–6,
C46–19, C46–7, C46–20, C46–8, C46–21, C46–9,
C46–22, C46–10, C46–23, C46–11, and C46–24.

Is there continuity?

—

Go to

Step 15

Go to

Step 14

Repair the circuit.

—

Go to

Step 16

—

Replace the control unit.

—

Go to

Step 16

—

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 16

INTELLIGENT SUSPENSION

3F–19

DTC3 Actuator Coil/Position Sensor Open Circuit or Short

Circuit Description

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

1. Turn off the starter switch.
2. Disconnect the actuator connectors C–46, C–31,

C–9, F–8, and F–7.

Is there continuity between the connector C–9
terminals 1 and 2?

—

Go to

Step 2

Go to

Step 3

Is there continuity between the connector C–9
terminals 3 and 4?

—

Go to

Step 4

Go to

Step 3

Replace the actuator FR.

—

Go to

Step 4

—

Is there continuity between the connector C–31
terminals 1 and 2?

—

Go to

Step 5

Go to

Step 6

Is there continuity between the connector C–31
terminals 3 and 4?

—

Go to

Step 7

Go to

Step 6

Replace the actuator FL.

—

Go to

Step 7

—

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

—

Go to

Step 8

Go to

Step 9

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

—

Go to

Step 10

Go to

Step 9

Replace the rear shock absorber RR.

—

Go to

Step 10

—

Is there continuity between the connector F–8
terminals 3 and 4?

—

Go to

Step 11

Go to

Step 12

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

—

Go to

Step 13

—

Replace the rear shock absorber RL.

—

Go to

Step 13

—

Is there continuity between the connector C–9 terminal
1 and connector C–46 terminal 4?

—

Go to

Step 14

Go to

Step 15

Is there continuity between the connector C–9 terminal
3 and connector C–46 terminal 17?

—

Go to

Step 16

Go to

Step 15

Repair the circuit.

—

Go to

Step 16

—

3F–20

INTELLIGENT SUSPENSION

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

Step

Yes

Value(s)

Action

Is there continuity between the connector C–9 terminal
2 and connector C–46 terminal 5?

—

Go to

Step 17

Go to

Step 18

Is there continuity between the connector C–9
terminals 4 and connector C–46 terminal 18?

—

Go to

Step 19

Go to

Step 18

Repair the circuit.

—

Go to

Step 19

—

Is there continuity between the connector C–31
terminal 1 and connector C–46 terminal 6?

—

Go to

Step 20

Go to

Step 21

Is there continuity between the connector C–31
terminal 3 and connector C–46 terminal 19?

—

Go to

Step 22

Go to

Step 21

Repair the circuit.

—

Go to

Step 22

—

Is there continuity between the connector C–31
terminal 2 and connector C–46 terminal 7?

—

Go to

Step 23

Go to

Step 24

Is there continuity between the connector C–31
terminal 4 and connector C–46 terminal 20?

—

Go to

Step 25

Go to

Step 24

Repair the circuit.

—

Go to

Step 25

—

Is there continuity between the connector F–7 terminal
4 and connector C–46 terminal 8?

—

Go to

Step 26

Go to

Step 27

Is there continuity between the connector F–7 terminal
8 and connector C–46 terminal 21?

—

Go to

Step 28

Go to

Step 27

Repair the circuit.

—

Go to

Step 28

—

Is there continuity between the connector F–7 terminal
3 and connector C–46 terminal 9?

—

Go to

Step 29

Go to

Step 30

Is there continuity between the connector F–7 terminal
7 and connector C–46 terminal 22?

—

Go to

Step 31

Go to

Step 30

Repair the circuit.

—

Go to

Step 31

—

Is there continuity between the connector F–8 terminal
4 and connector C–46 terminal 10?

—

Go to

Step 32

Go to

Step 33

Is there continuity between the connector F–8 terminal
8 and connector C–46 terminal 23?

—

Go to

Step 34

Go to

Step 33

Repair the circuit.

—

Go to

Step 34

—

Is there continuity between the connector F–8 terminal
3 and connector C–46 terminal 11?

—

Go to

Step 35

Go to

Step 36

Is there continuity between the connector F–8 terminal
7 and connector C–46 terminal 24?

—

Go to

Step 37

Go to

Step 36

Repair the circuit.

—

Go to

Step 37

—

1. Disconnect the terminals C–45, C–8, C–30, F–7,

and F–8.

Is there continuity between the connector–terminal
C45–29 and C8–6, C45–37 and C30–6, C45–33 and
F7–2, C45–41 and F8–2?

—

Go to

Step 38

Go to

Step 41

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