Table 1, Diagnostic Plug XD and
Voltage Supply, Check
TECH 1 refers to table 1 if
the unit is correctly connected, but data cannot be received from control unit
K103. In this case, perform the following tests:
· Carry out TECH 1
self-test as described in the TECH 1 Operating Instructions.
Important: For this test, TECH 1 must be connected to the
battery with the battery connection lead.
· Check DLC adapter being
used as described in the TECH 1 Operating Instructions.
If data still cannot be received after the self-test, check the
· diagnostic plug XD
· voltage supply of the
control unit K103
· ground connection of the
control unit K103
according to table 1.
Table 1, Diagnostic Plug XD and Voltage Supply, Check
|
Test Step
|
Test Equipment
Multimeter MKM-587-A
|
Check of
|
Terminal
|
Notes
|
Nominal Values
|
Possible
Cause of Fault, Trouble-shooting
|
|
1
|
Ohmmeter, range 200 W
|
Diagnostic plug XD:
Ground
|
Ter. 4 and 5/ ground
|
Ignition OFF
|
lower than 2 W
|
· Transfer resistance at grounding point
too high
· Lead interruption between XD/
Ter. 4 or Ter. 5 and ground
|
|
2
|
Voltmeter, range 20 V, DC
|
Diagnostic plug
XD:
Voltage supply Ter. 30
|
Ter. 16/ ground
|
Ignition OFF
|
higher than 11.5 V
|
· Battery voltage too low
· Lead interruption between XD/
Ter. 16 and voltage supply Ter. 30
· Battery discharged
|
|
3
|
Ohmmeter, range 200 W
|
Diagnostic plug XD / 8-pin
wiring harness plug for control unit K103:
Bidirectional data lead K
|
XD/ Ter. 7
8-pin wiring harness plug
Ter. 6
|
Disconnect battery negative
terminal, remove driver's seat, release 8-pin wiring harness plug
"voltage supply" and disconnect from control unit K103
|
lower than 2 W
|
· Lead interruption between XD/
Ter. 7 and 8-pin wiring harness plug Ter. 6 for control unit K103
· Control unit K103 defective
|
|
4
|
Voltmeter, range 20 V, DC
|
8-pin wiring harness plug for
control unit K103:
Voltage supply Ter. 30
|
Ter. 1 and Ter. 3/
ground
|
Connect battery negative
terminal Ignition OFF
|
higher than 11.5 V
|
· Battery voltage too low
· Lead interruption between Ter. 30
and 8-pin wiring harness plug Ter. 1 or Ter. 3 for control unit
K103
· K103 defective
|
|
5
|
Voltmeter range 20 V, DC
|
8-pin wiring harness plug for
control unit K103:
Voltage supply Ter. 15
(ignition)
|
Ter. 4/ ground
|
Ignition ON
|
higher than 11.5 V
|
· Battery voltage too low
· Lead interruption between Ter. 15
and 8-pin wiring harness plug Ter. 4 for control unit K103
· K103 defective
|
|
6
|
Ohmmeter, range 200 W
|
8-pin wiring harness plug for
control unit K103:
Ground
|
Ter. 2 and Ter. 5 /
ground
|
Ignition OFF
|
lower than 2 W
|
· Transfer resistance between 8-pin
wiring harness plug Ter. 2 or Ter. 5 for K103 and ground too high
· Lead interruption between 8-pin wiring
harness plug Ter. 2 or Ter. 5 for K103 and ground
|
