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F0: Data List - Test Step 02 REAR WHL SPEEDS RL WHEEL SPEED/RR WHEEL SPEED > < Abbreviations, Definitions

Astra

FO: DATA LIST

Trouble-shooting in the FO:DATA LIST is matched to TECH 1. If TECH 1 is not available, check the peripheral information sensors with Multimeter MKM-587-A. The current actual values of all sensors and signals necessary for the functioning of the system can be called up via FO:DATA LIST. The actual values displayed must then be compared with the nominal values listed in these Checking Procedures. In this way, a clear fault diagnosis can be made.

 

 

No.

TECH 1 Display

Conditions for Checking

Nominal Value

Trouble Codes

Terminal

01

 

FRONT WHEEL SPEEDS

 

Ignition ON

With jacked-up vehicle, slowly turn front left/front right

 

25,39,41,42

 

43

See

"Note"

 

FL WHEEL SPEED

wheeld by hand

or

approx. 50 km/h

(30 MPH)

 

 

 

 

FR WHEEL SPEED

 

 

Drive vehicle at approx. 50 km/h (30 MPH)

 

Note:

Control unit terminals for wheel sensors:

front, left

ABS-2E:                   Ter. 4 and 5

ABS-2EH with ETC:

                                 X90/Ter. 4 and 5

ABS-2EH without ETC:

                                 X89/Ter. 7 and 13

front, right

ABS-2E:                   Ter. 11 and 21

ABS-2EH with ETC:

                                 X90/Ter. 20 and 21

ABS-2EH without ETC:

                                 X89/Ter. 5 and 10

ETC = Electronic Traction Control

or

TECH 1 approx. the same as speedometer display

 

 

 

 

 

FO: DATA LIST

 

Notes for Trouble-shooting:

Nominal Value:

Cause of Fault:

 

·   Ignition ON

     Turn front left/front right wheel slowly by hand

 

 

 

approx. 5 km/h (3 MPH)

 

 

or

TECH 1 display approx. the same as speedometer display

 

 

 

·   Distance from wheel speed sensor to ring gear (pulse pick-up) too large; Nominal value:         0.2 to 1.5 mm/

                                      0.008 to 0.06 in.

·   Wheel speed sensor (or bracket) loose

·   Ring gear (pulse pick-up) damaged;

     Nominal value:         29 teeth

·   Wheel speed sensors mixed up.

 

Only applies to ABS-2E, FL wheel speed sensor

 

 

 

Ignition OFF

·   Remove plug from control unit K 50 Connect ohmmeter between plug K 50/Ter. 4 and Ter. 5,

     raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

 

·   Plug connection X 76 of wheel speed sensor P 17 defective

·   Loose contact between plug connection X 76 and wheel speed sensor P 17

·   Lead interruption from control unit K 50/Ter. 4 or Ter. 5 to plug connection X 76 of wheel speed sensor P 17

 

·   Connect ohmmeter between plug K 50/Ter. 5 and Ter. 10

 

> 100 kW

(over entire lifespan)

 

·   Short circuit to ground

     Transfer resistance to ground at plug connection X 76

 

·   Set voltmeter to alternating current Connect voltmeter to control unit plug K 50/Ter. 4 and Ter. 6

     Turn wheel at speed of 1 turn per second

 

 

 

> 30 mV

(alternating current)

·   Lead interruption between plug X 76 and wheel speed sensor P 17

 

Only applies to ABS-2EH with ETC, FL wheel speed sensor:

 

 

 

·   Ignition OFF

     Remove plug from control unit U 4.8 Connect ohmmeter between plug X 90/Ter. 4 and Ter. 5,

     raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

·   Plug connection X 76 of wheel speed sensor P 17 defective

·   Loose contact between plug connection X 76 and wheel speed sensor P 17

·   Lead interruption from control unit X 90/Ter. 4 or Ter. 5 to plug connection X 76 of wheel speed sensor P 17

 

·   Set voltmeter to alternating current Connect voltmeter to control unit plug X 90/ Ter. 4 and Ter. 5

     Turn, wheel- at speed of 1 turn per second

 

 

 

> 30 mV

(alternating current)

 

·   Lead interruption between plug X 76 and wheel speed sensor P 17

 

Only applies to ABS-2EH without ETC, FL wheel speed sensor:

 

 

 

·   Ignition OFF

     Remove plug from control unit U 4.8 Connect ohmmeter between plug X 89/Ter. 13 and Ter. 7,

     raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

·   Plug connection X 76 of wheel speed sensor P 17 defective

·   Loose contact between plug connection X 76 and wheel speed sensor P 17

·   Lead interruption from control unit X 89/Ter. 13 or Ter. 7 to plug connection X 76 of wheel speed sensor P 17

 

·   Set voltmeter to alternating current Connect voltmeter to control unit plug X 89/Ter. 13 and Ter. 7

     Turn wheel at speed of 1 turn per second

 

 

 

> 30 mV

(alternating current)

 

·   Lead interruption between plug X 76 and wheel speed sensor P 17

 

Only applies to ABS-2E, FR wheel speed sensor:

 

 

 

·   Ignition OFF

     Remove plug from control unit K 50 Connect ohmmeter between plug K 50/Ter. 11 and Ter. 21,

     raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

 

·   Plug connection X 77 of wheel speed sensor P 18 defective

·   Loose contact between plug connection X 77 and wheel speed sensor P 18

·   Lead interruption from control unit K 50/Ter. 11 or Ter. 21 to plug connection X 77 of wheel speed sensor P 18

 

·   Connect ohmmeter between plug K 50/ Ter. 11 and Ter. 10

 

 

 

 > 100 kW

(over entire lifespan)

 

·   Set voltmeter to alternating current Connect voltmeter to control unit plug K 50/Ter. 11 and Ter. 21

     Turn wheel at speed of 1 turn per second

 

·   Short circuit to ground

     Transfer resistance to ground at plug connection X 77

 

> 30 mV

(alternating current)

 

·   Lead interruption between plug X 77 and wheel speed sensor P 18

 

Only applies to ABS-2EH with ETC, FR wheel speed sensor:

 

 

 

·   Ignition OFF

     Remove plug from control unit U 4.8 Connect ohmmeter between plug X 90/Ter. 20 and Ter. 21, raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

 

·   Plug connection X 77 of wheel speed sensor P 18 defective

·   Loose contact between plug connection X 77 and wheel speed sensor P 18

·   Lead interruption from control unit X 90/Ter. 20 or Ter. 21 to plug connection X 77 of wheel speed sensor P 18

·   Set voltmeter to alternating current Connect voltmeter to control unit plug X 90/ Ter. 20 and Ter. 21

     Turn wheel at speed of 1 turn per second

 

 

 

> 30 mV

(alternating current)

·   Lead interruption between plug X 77 and wheel speed sensor P 18

 

Only applies to ABS-2EH without ETC, FR wheel speed sensor:

 

 

 

·   Ignition OFF

     Remove plug from control unit U 4.8 Connect ohmmeter between plug X 89/Ter. 5 and Ter. 10, raise vehicle and move cable by hand to and fro, especially in area of wheel housing

     Check that the measured value displayed stays constant

 

 

 

0.8 to 1.7 kW

·   Plug connection X 77 of wheel speed sensor P 18 defective

·   Loose contact between plug connection X 77 and wheel speed sensor P 18

·   Lead interruption from control unit X 89/Ter. 5 or Ter. 10 to plug connection X 77 of wheel speed sensor P 18

 

·   Set voltmeter to alternating current Connect voltmeter to control unit plug X 89/ Ter. 5 and Ter. 10

     Turn wheel at speed of 1 turn per second

 

 

 

> 30 mV

(alternating current)

·   Lead interruption between plug X 77 and wheel speed sensor P 18

 

 

 

 
Related Literature Units
-Table 2 - Trouble Code Table: Trouble Code 25 DEFECTIVE TOOTH ON WHEEL SENSOR
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F0: Data List - Test Step 02 REAR WHL SPEEDS RL WHEEL SPEED/RR WHEEL SPEED > < Abbreviations, Definitions