|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
06
|
RR WHEEL SPEED
|
Ignition ON
With vehicle jacked up, slowly turn rear right wheel by hand
|
approx. 5.0 km/h (3.0 MPH)
|
25, 44, 45, 46, 47
|
22, 23
|
|
|
|
or
|
or
|
|
|
|
|
|
drive vehicle
|
TECH 1 display approx. the same as speedometer display
|
|
|
|
Notes for Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
Rear left wheel speed sensor:
· Ignition
OFF
· Disconnect
plug X 25P from control unit U.4.8
|
|
|
|
· Connect
ohmmeter between plug X 25P / Ter. 9 and Ter. 21
· Move
cable to and fro by hand, especially in area of differential
· Ensure
that measured value remains constant
|
0.8 to 1.7 kW
|
· Plug
connection X 2P of rear left wheel speed sensor P 19 defective
· Loose
contact between plug connection X 2P and rear left wheel speed sensor
P 19
· Lead
interruption from control unit U 4.8 / X 25P / Ter. 9 or
Ter. 21 to plug connection X 2P of rear left wheel speed sensor
P 19
|
|
· Connect
ohmmeter between plug X 25P / Ter. 9 and ground or
X 25P / Ter. 21 and
ground
|
infinite W
|
·
Shielding of rear left wheel speed sensor P 19 defective
|
|
·
Set voltmeter to alternating voltage
· Connect
voltmeter to control unit plug U 4.8 / X 25P / Ter. 9 and
Ter. 21
· Turn
rear left wheel approx. 1 revolution per second
(alternating voltage)
|
greater than 30 mV
|
· Lead
interruption between plug X 2P and rear left wheel speed sensor
P 19
|
|
Rear right wheel speed sensor:
· Ignition
OFF
· Disconnect
plug X 25P from control unit U. 4.8
· Connect
ohmmeter between plug X 25P / Ter. 22 and Ter. 23
· Move
cable to and fro by hand, especially in area of differential
· Ensure
that measured value remains constant
|
0.8 to 1.7 kW
|
· Plug
connection X 2P of rear right wheel speed sensor P 20 defective
· Loose
contact between plug connection X 2P and rear right wheel speed sensor
P 20
· Lead
interruption from control unit U 4.8 / X 25P / Ter. 22 or
Ter. 23 to plug connection X 2P of rear right wheel speed sensor
P 20
|
|
· Connect
ohmmeter between plug X 25P / Ter. 22 and ground or
X 25P / Ter. 23 and ground
|
infinite W
|
· Shielding
of rear right wheel speed sensor P 20 defective
|
|
· Set
voltmeter to alternating voltage
· Connect
voltmeter to control unit plug U 4.8 / X 25P / Ter. 22
and Ter. 23
· Turn
rear right wheel approx. 1 revolution per second
(alternating voltage)
|
greater than 30 mV
|
· Lead
interruption between plug X 2P and rear right wheel speed sensor
P 20
|
|
|
|
|
|
|
|
