|
Test
Step
No.
|
Test Equipment
Multimeter MKM-587-A
|
Check of
|
Terminal
|
Notes
|
Nominal Values
|
Possible Cause of
Fault,
Trouble -
shooting
|
|
|
1
|
Ohmmeter
|
Diagnostic plug (ALDL): ground
|
XD / Ter. 3 /
Ground
|
Ignition OFF
|
approx. 0 W
|
· Transfer
resistance at grounding point too high
· Lead
interruption between XD / Ter. 3 and ground
|
|
|
2
|
Voltmeter
range: 20 V
DC
|
Diagnostic plug (ALDL): voltage supply
|
XD / Ter. 16 /
Ground
|
Ignition ON
|
greater than
11.5 V
|
· Battery
voltage too low
· Lead
interruption between XD / Ter. 16 and voltage supply
· Fuse
F 15 defective
|
|
|
3
|
Ohmmeter
|
Diagnostic plug
ABS - 2SH
data lead
|
XD / Ter. 12 /
U 4.8 / X 25P /
Ter. 15
|
Ignition OFF
|
approx. 0 W
|
· Lead
interruption between XD / Ter. 12 and U 4.8 /
X 25P / Ter. 15
· Plug
connection X 1 / Ter. 105 defective
· Control
unit U 4.8 defective
|
|
|
4
|
-
|
Telltale H 26
(ABS)
|
-
|
Ignition ON
|
Telltale ON
|
· Telltale H 26
defective
· Fuse F 15
defective
· Lead interruption
between H 26 and U 4.8 / X 25P / Ter. 1
· Lead interruption
between H 26 and U 4.8 / X 4P / Ter. 4
· Plug connection
X 1 / Ter. 43 defective
· Control unit
U 4.8 defective
|
|
|
5
|
-
|
Telltale H 51
(ABS)
|
-
|
Ignition ON
|
Telltale ON
|
· Telltale H 51
defective
· Fuse F 15
defective
· Lead interruption
between H 51 and U 4.8 / X 25P / Ter. 25
· Plug connection
X 1 / Ter. 45 defective
· Control unit
U 4.8 defective
|
|
|
6
|
-
|
TECH 1 self - test,
DLC adapter
|
-
|
See TECH 1
Operating Instructions
|
-
|
-
|
|
|
|
Note: Any trouble codes that may be stored are
deleted after test steps 7 and 8.
|
|
7
|
Ohmmeter
|
Plug X 4P to control unit U 4.8:
ground
|
Ter. 3 / Ground
|
Ignition OFF
Disconnect plug X 4P from control unit U 4.8
|
approx. 0 W
|
· Transfer
resistance at grounding point too high
· Lead interruption
between U 4.8 / X 4P / Ter. 3 and grounding point
· Control unit
U 4.8 defective
|
|
|
8
|
Voltmeter
range:
20 V DC
|
Control unit plug U 4.8: voltage supply Ter. 30 and
Ter. 15
|
U 4.8 / X 4P / Ter. 1 / Ground
U 4.8 / X 4P / Ter. 2 / Ground
|
Ignition OFF Disconnect plug U 4.8 / X 4P
Ign. ON
|
greater than 11.5 V
|
· Battery voltage
too low
· Lead
interruption betw. Ter.
30 or Ter. 15 and control unit
U 4.8 / X 4P / Ter. 2 or
U 4.8 / X 4P / Ter. 1
· Fuse F 19
defective
· Control unit
U 4.8 defective
|
|
