2002 ISUZU AXIOM Service Repair Manual

INTELLIGENT SUSPENSION3F±13
Parts Location
810R200001
Legend
(1) C±9
(2) C±8
(3) H±8, H±11, H±14
(4) I±24, I±23 , I±22
(5) I±31
(6) F±7
(7) C±39
(8) F±8
(9) F±6
(10) H±19(11) H±9, H±10
(12) C±30
(13) C±31
(14) H±5, H±6
(15) C±26
(16) E±34, E±35
(17) C±46, C±45, C±44
(18) I±10
(19) E±23
(20) C±10

3F±14INTELLIGENT SUSPENSION
Connector List
No.Connector face
C±8
C±9
C±10
C±26
C±30
C±31
C±39
C±44
C±45
No.Connector face
C±46
E±23
E±34
E±35
F±6
F±7
F±8
H±5
H±6

INTELLIGENT SUSPENSION3F±15
No.Connector face
H±8
H±9
H±10
H±11
H±14
H±19
I±10
I±22
I±23
No.Connector face
I±24
I±31

3F±16INTELLIGENT SUSPENSION
Diagnostic Trouble Code (DTC)
Identification
DTC No.DTC NAMECODE
MEMORYWARNING
LAMP
2Actuator Coil Over CurrentYe sOFF
3Actuator Coil/Position Sensor Open Circuit or ShortYe sON
4G±Sensor Open Circuit or ShortYe sON
5Vehicle Speed Sensor Open Circuit or ShortYe sOFF
6Stop Lamp Switch Open Circuit, Short or Contact Point TroubleYe sOFF
7Engine Speed Signal Open Circuit or ShortYe sOFF
9Control Unit AbnormalityYe sOFF

INTELLIGENT SUSPENSION3F±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
StepActionValue(s)Ye sNo
11. 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 2Go to Step 3
21. 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 4Go to Step 3
3Replace the actuator FR.
ÐGo to Step 4Ð
41. 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 5Go to Step 6
51. 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 7Go to Step 6
6Replace the actuator FL.
ÐGo to Step 7Ð
71. 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 8Go to Step 9
81. 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 10Go to Step 9
9Replace the rear shock absorber RR.
ÐGo to Step 10Ð
101. 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 11Go to Step 12
111. 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 13Go to Step 12

3F±18INTELLIGENT SUSPENSION
DTC2 Actuator Coil Over Current (Cont'd)
StepNo Ye s Value(s) Action
12Replace the rear shock absorber RL.
ÐGo to Step 16Ð
13If 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?
ÐGo to Step 15Go to Step 14
14Repair the circuit.
ÐGo to Step 16Ð
15Replace the control unit.
ÐGo to Step 16Ð
161. Reconnect all components, ensure all components
are properly mounted.
2. Clear the DTC.
Was this step finished?
Ð
Go to ªBasic
Diagnosis
Flowº.
Go to Step 16

INTELLIGENT SUSPENSION3F±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

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
StepActionValue(s)Ye sNo
11. 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?
ÐGo to Step 2Go to Step 3
2Is there continuity between the connector C±9
terminals 3 and 4?
ÐGo to Step 4Go to Step 3
3Replace the actuator FR.
ÐGo to Step 4Ð
4Is there continuity between the connector C±31
terminals 1 and 2?
ÐGo to Step 5Go to Step 6
5Is there continuity between the connector C±31
terminals 3 and 4?
ÐGo to Step 7Go to Step 6
6Replace the actuator FL.
ÐGo to Step 7Ð
7Is there continuity between the connector F±7
terminals 3 and 4?
ÐGo to Step 8Go to Step 9
8Is there continuity between the connector F±7
terminals 7 and 8?
ÐGo to Step 10Go to Step 9
9Replace the rear shock absorber RR.
ÐGo to Step 10Ð
10Is there continuity between the connector F±8
terminals 3 and 4?
ÐGo to Step 11Go to Step 12
11Is there continuity between the connector F±8
terminals 7 and 8?
ÐGo to Step 13Ð
12Replace the rear shock absorber RL.
ÐGo to Step 13Ð
13Is there continuity between the connector C±9 terminal
1 and connector C±46 terminal 4?
ÐGo to Step 14Go to Step 15
14Is there continuity between the connector C±9 terminal
3 and connector C±46 terminal 17?
ÐGo to Step 16Go to Step 15
15Repair the circuit.
ÐGo to Step 16Ð

3F±20INTELLIGENT SUSPENSION
DTC3 Actuator Coil/Position Sensor Open Circuit or Short (Cont'd)
StepNo Ye s Value(s) Action
16Is there continuity between the connector C±9 terminal
2 and connector C±46 terminal 5?
ÐGo to Step 17Go to Step 18
17Is there continuity between the connector C±9
terminals 4 and connector C±46 terminal 18?
ÐGo to Step 19Go to Step 18
18Repair the circuit.
ÐGo to Step 19Ð
19Is there continuity between the connector C±31
terminal 1 and connector C±46 terminal 6?
ÐGo to Step 20Go to Step 21
20Is there continuity between the connector C±31
terminal 3 and connector C±46 terminal 19?
ÐGo to Step 22Go to Step 21
21Repair the circuit.
ÐGo to Step 22Ð
22Is there continuity between the connector C±31
terminal 2 and connector C±46 terminal 7?
ÐGo to Step 23Go to Step 24
23Is there continuity between the connector C±31
terminal 4 and connector C±46 terminal 20?
ÐGo to Step 25Go to Step 24
24Repair the circuit.
ÐGo to Step 25Ð
25Is there continuity between the connector F±7 terminal
4 and connector C±46 terminal 8?
ÐGo to Step 26Go to Step 27
26Is there continuity between the connector F±7 terminal
8 and connector C±46 terminal 21?
ÐGo to Step 28Go to Step 27
27Repair the circuit.
ÐGo to Step 28Ð
28Is there continuity between the connector F±7 terminal
3 and connector C±46 terminal 9?
ÐGo to Step 29Go to Step 30
29Is there continuity between the connector F±7 terminal
7 and connector C±46 terminal 22?
ÐGo to Step 31Go to Step 30
30Repair the circuit.
ÐGo to Step 31Ð
31Is there continuity between the connector F±8 terminal
4 and connector C±46 terminal 10?
ÐGo to Step 32Go to Step 33
32Is there continuity between the connector F±8 terminal
8 and connector C±46 terminal 23?
ÐGo to Step 34Go to Step 33
33Repair the circuit.
ÐGo to Step 34Ð
34Is there continuity between the connector F±8 terminal
3 and connector C±46 terminal 11?
ÐGo to Step 35Go to Step 36
35Is there continuity between the connector F±8 terminal
7 and connector C±46 terminal 24?
ÐGo to Step 37Go to Step 36
36Repair the circuit.
ÐGo to Step 37Ð
371. 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?
ÐGo to Step 38Go to Step 41