|
Test
|
Test Equipment
|
Check
|
Notes
|
Nominal
|
Possible Cause of Fault
|
| Step |
|
Multimeter
|
|
|
|
Value
|
Trouble-shooting
|
|
|
|
MKM-587-A
|
of
|
between
|
|
|
|
|
|
1
|
Ohmmeter,
range 200 W
|
Diagnostic
plug XD (ALDL); ground
|
XD/
Ter. 4
|
Ground
|
Ignition
OFF
|
lower
than
3
W
|
Transition
resistance at grounding point too high
|
|
| 2 |
|
Ohmmeter,
range 200 W
|
Diagnostic
plug XD (ALDL); ground
|
XD/
Ter. 5
|
Ground
|
Ignition
OFF
|
lower
than
3
W
|
Transition
resistance at grounding point too high
|
|
| 3 |
|
Voltmeter,
range 20 V/DC
|
Diagnostic
plug XD (ALDL); battery voltage
|
XD/
Ter. 16
|
Ground
|
Ignition
OFF
|
greater
than 11 V
|
Battery
voltage absent or battery voltage too low
|
|
| 4 |
|
Voltmeter,
range 20 V/DC
|
Diagnostic
lead to ATWS control unit
|
XD/
Ter. 8
|
Ground
|
Ignition
ON
|
greater
than 11 V
|
Carry
out test steps 5 and 7
If
nominal value is attained:
proceed
with test step 8
|
|
| 5 |
|
Ohmmeter,
range 2 MW
|
Diagnostic
lead to ATWS control unit
|
XD/
Ter. 8
|
Ground
|
Ignition
OFF
|
greater
than
100
kW
|
Short
circuit to ground
proceed
with test step 6
|
|
| 6 |
|
Ohmmeter,
range 2 MW
|
Diagnostic
lead to ATWS control unit
|
XD/
Ter. 8
|
Ground
|
Disconnect
wiring harness plug K37
|
greater
than
100
kW
|
Short
circuit to ground in lead XD/Ter. 8
If
okay and test step 5 not okay: ATWS control unit defective
|
|
| 7 |
|
Ohmmeter,
range 200 W
|
Diagnostic
lead to ATWS control unit Passage check
|
XD/
Ter. 8
|
Wiring
har- ness plug K37/ Ter. 8
|
Ignition
OFF
|
lower
than
2
W
|
Interruption
in lead XD/Ter. 8 to wiring harness plug K94/Ter. 12
proceed
with test step 8
|
|
| 8 |
|
Voltmeter,
range 20 V/DC
|
Diagnostic
lead to ATWS control unit
|
XD/
Ter. 8
|
Ground
|
Ignition
OFF
Disconnect
wiring harness plug K94
|
lower
than
2
V
|
Short
circuit to battery voltage in lead XD/Ter. 8
If
okay and test step 4 not okay: ATWS control unit defective
|
|
| 9 |
|
Ohmmeter,
range 200 W
|
Ground
to ATWS control unit
|
Wiring
har- ness plug K94/ Ter. 22
|
Ground
|
Ignition
OFF
Disconnect
wiring harness plug K94
|
lower
than
2
W
|
No
ground at ATWS control unit
|
|
| 10 |
|
Voltmeter,
range 20 V/DC
|
Battery
voltage
Ter.
30 to ATWS control unit
|
Wiring
har- ness plug K94/ Ter. 2
|
Ground
|
Ignition
OFF
Disconnect
wiring harness plug K94
|
greater
than 11 V
|
Battery
voltage Ter. 30 absent to wiring harness plug K94/Ter. 2
|
|
| 11 |
|
Ohmmeter,
range 200 W
|
Battery
voltage
Ter.
15 to ATWS control unit
|
Wiring
har- ness plug K94/ Ter. 30
|
Ground
|
Ignition
ON
Disconnect
wiring harness plug K94
|
greater
than 11 V
|
Battery
voltage Ter. 15 absent to wiring harness plug K94/Ter. 30
|
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