WABCO SMARTTRAC MM1543, Руководство по обслуживанию

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Appendix I
SPN Component FMI Fault Description Repair
639
J1939 vehicle
CAN data
interface
1
J1939 data interface
disturbed or
message timeout
• If the ABS ECU is the only vehicle ECU not communicating,
verify the J1939 wiring between the ABS ECU and the
J1939 backbone.
• Resistance should be 60 ohms between J1939 high and
low.
• Key on, check the voltage to ground at the ECU harness
connector J1939 pins, and verify the high side has 2.5 to 5
volts and the low side has 2.49 volts or less. The readings
will fluctuate but should be in range and should never be
the same. The total of both readings together should be
approximately 5 volts.
3
5
6
7
9
10
11
14
810
J1939 based
speed signal
input
13
WABCO CAN data
interface disturbed or
message timeout
• Verify that the engine ECU is communicating on J1939.
•
Verify that ABS ECU is configured correctly for vehicle
application.
1807
Steering
angle sensor
4
The steering wheel
angle signal is
not available after
ignition on.
• Check CAN wiring between ABS ECU and SAS for
interruptions and short circuits.
• Check for corroded or damaged wiring between SAS and
ESC module.
• Contact the WABCO Customer Care Center at
855-228-3203 to check the parameter setting of the ECU
and SAS compatibility.
7
The calculated
steering ratio of
the vehicle is not
plausible.
• Check for correct mounting of the SAS and ESC module.
•
If work has been performed on the vehicle which affects
the steering system or front end alignment, perform SAS
calibration and ESC initialization.
8
Steering angle
sensor calibration
failed
• Verify the SAS is correctly mounted.
•
Perform SAS calibration and ESC initialization.
9
Data communication
fault with ESC
module
• Check the harness between ABS ECU and SAS.
• Check the parameter setting of ABS ECU.
• Check SAS operation if the fault persists.
12
Steering angle
sensor internal error
communicated
• Check CAN wiring between ABS ECU and SAS for
interruptions and short circuits.
• Check for corroded or damaged wiring between the SAS
and ESC module.
• Check SAS operation if the fault persists.
13
Steering angle
sensor calibration
required
• Follow the SAS calibration procedure defined in the
maintenance manual.
14
Steering angle
sensor internal error
communicated
• Check the installation and condition of the SAS and steering
system.
2622
Hill start aid
(HSA)
2 HSA Active Fault
• Verify if ECU is correct for vehicle application.
• Contact vehicle OEM to verify broadcast of HSA switch is
correct.