|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
12
|
VEHICLE SPEED
|
Vehicle travelling at a constant
speed of
|
|
-
|
12
|
|
|
|
less
than 10 km/h (6 mph)
|
< 10 km/h
|
|
|
|
|
|
approx.
25 km/h (15 mph)
|
10 - 50 km/h
|
|
|
|
|
|
approx.
70 km/h (43 mph)
|
> 50 km/h
|
|
|
|
|
|
|
|
|
|
|
Notes for Trouble-shooting:
|
Nominal Value:
|
Cause of Fault:
(If nominal value is not attained)
|
|
· Check speedometer display
|
OK
|
If nominal value is attained:
|
|
|
|
· Lead for odometer signal to TID wiring
harness plug Ter. 12 is interrupted
|
|
· Ignition OFF
|
|
· TID defective
|
|
· Remove instrument assembly
|
|
|
|
· Disconnect TID wiring harness plug
|
|
|
|
· Install instrument assembly
|
|
|
|
· Repeat test drive
|
|
|
|
· Check speedometer display
|
OK
|
If nominal
value is attained:
|
|
|
|
· TID defective
|
|
· Ignition OFF
|
|
|
|
· Release and disconnect wiring harness
plug from ABS control unit U4.8 (25-pin)
|
|
|
|
· Ignition ON
|
|
|
|
· Using multimeter, measure voltage in
TID wiring harness plug Ter.12 to ground
|
lower than 3 V
|
· Lead to TID wiring harness plug Ter. 12
has short circuit to battery voltage
|
|
· Using multimeter, measure resistance in
TID wiring harness plug Ter. 12 to ground
|
higher than 1 kW
|
· Lead to TID wiring harness plug Ter. 12
or one of the other connected systems has short circuit to ground
|
|
· Short-circuit wiring harness plug of
ABS control unit U4.8 / Ter. 6 to ground
|
|
|
|
· Using multimeter, measure resistance in
TID wiring harness plug Ter. 12 to ground
|
lower than 2 W
|
· Lead to TID wiring harness plug Ter. 12
is interrupted
|
|
· Ignition OFF
|
|
|
|
· Disconnect wiring harness plug of
engine control unit
|
|
|
|
· Using multimeter, measure resistance in
TID wiring harness plug Ter. 12 to ground
|
higher than 1 kW
|
· Lead from TID wiring harness plug Ter.
12 to engine control unit plug Ter. 9 (MOTRONIC, for SIMTEC and diesel Ter.
29) has short circuit to ground (measurement lower than
2 W)
|
|
|
|
If measurement okay and previous
measurement not okay:
|
|
|
|
· Check engine control unit
|
|
· Short-circuit Ter. 9 of engine control
unit plug to ground
(MOTRONIC,
for SIMTEC and diesel Ter. 29)
|
|
|
|
· Using multimeter, measure resistance in
TID wiring harness plug Ter. 12 to Ter. 2 (ground)
|
lower than 2 W
|
· Lead of TID wiring harness plug Ter. 12
to engine control unit plug Ter. 9
(for
SIMTEC and diesel Ter. 29) interrupted
|
|
· Further possible faults:
|
|
· TID defective
|
|
|
|
· ABS control unit U4.8 defective
|
|
|
|
· Engine control unit defective
|
|
|
|
· Power steering control unit K41
defective
|
|
|
|
· Speedometer P43 defective
|
|
|
|
· Radio defective
|
|
|
|
· Electronic cruise control K14 defective
|
|
|
|
· Safety check warning buzzer H27
defective
|
|
|
|
· Sun roof motor M61 defective
|
|
|
|
|
|
|
|
|
|
|
|
