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
D
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.
D
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
No
1
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
W
Go to
Step 2
Go to
Step 3
2
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
W
Go to
Step 4
Go to
Step 3
3
Replace the actuator FR.
—
Go to
Step 4
—
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
W
Go to
Step 5
Go to
Step 6
5
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
W
Go to
Step 7
Go to
Step 6
6
Replace the actuator FL.
—
Go to
Step 7
—
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
W
Go to
Step 8
Go to
Step 9
8
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
W
Go to
Step 10
Go to
Step 9
9
Replace the rear shock absorber RR.
—
Go to
Step 10
—
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
W
Go to
Step 11
Go to
Step 12
11
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
W
Go to
Step 13
Go to
Step 12
3F–18
INTELLIGENT SUSPENSION
DTC2 Actuator Coil Over Current (Cont’d)
Step
No
Yes
Value(s)
Action
12
Replace the rear shock absorber RL.
—
Go to
Step 16
—
13
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
14
Repair the circuit.
—
Go to
Step 16
—
15
Replace the control unit.
—
Go to
Step 16
—
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
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
D
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.
D
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–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
2
Is there continuity between the connector C–9
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–31
terminals 1 and 2?
—
Go to
Step 5
Go to
Step 6
5
Is there continuity between the connector C–31
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–7
terminals 3 and 4?
—
Go to
Step 8
Go to
Step 9
8
Is there continuity between the connector F–7
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–8
terminals 3 and 4?
—
Go to
Step 11
Go to
Step 12
11
Is there continuity between the connector F–8
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–9 terminal
1 and connector C–46 terminal 4?
—
Go to
Step 14
Go to
Step 15
14
Is there continuity between the connector C–9 terminal
3 and connector C–46 terminal 17?
—
Go to
Step 16
Go to
Step 15
15
Repair the circuit.
—
Go to
Step 16
—
3F–20
INTELLIGENT SUSPENSION
DTC3 Actuator Coil/Position Sensor Open Circuit or Short (Cont’d)
Step
No
Yes
Value(s)
Action
16
Is there continuity between the connector C–9 terminal
2 and connector C–46 terminal 5?
—
Go to
Step 17
Go to
Step 18
17
Is there continuity between the connector C–9
terminals 4 and connector C–46 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–31
terminal 1 and connector C–46 terminal 6?
—
Go to
Step 20
Go to
Step 21
20
Is there continuity between the connector C–31
terminal 3 and connector C–46 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–31
terminal 2 and connector C–46 terminal 7?
—
Go to
Step 23
Go to
Step 24
23
Is there continuity between the connector C–31
terminal 4 and connector C–46 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–7 terminal
4 and connector C–46 terminal 8?
—
Go to
Step 26
Go to
Step 27
26
Is there continuity between the connector F–7 terminal
8 and connector C–46 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–7 terminal
3 and connector C–46 terminal 9?
—
Go to
Step 29
Go to
Step 30
29
Is there continuity between the connector F–7 terminal
7 and connector C–46 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–8 terminal
4 and connector C–46 terminal 10?
—
Go to
Step 32
Go to
Step 33
32
Is there continuity between the connector F–8 terminal
8 and connector C–46 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–8 terminal
3 and connector C–46 terminal 11?
—
Go to
Step 35
Go to
Step 36
35
Is there continuity between the connector F–8 terminal
7 and connector C–46 terminal 24?
—
Go to
Step 37
Go to
Step 36
36
Repair the circuit.
—
Go to
Step 37
—
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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