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Diagnostic Manual, Chassis and Drivetrain,
Volume 2
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LOCATION:
5.2 Acceleration Slip Regulation (ASR)
> 13 Diagnosis - Complaint Related Diagnostic Chart
Diagnosis - Complaint Related Diagnostic Chart
Complaint/Problem
Possible cause
Test step/Remedy
1)
ASR MIL (A1e22) or ABS MIL (A1e17) comes on while engine is running
12
,
Base module
1.1
11
ASR MIL (A1e22) or ABS MIL (A1e17) comes on while driving and stays on
12
ASR MIL (A1e22) or ABS MIL (A1e17) intermittently comes on while driving
Voltage supply less than 11 V, too many electrical consumers on
Test generator (G2),
12
ABS MIL (A1e17) does not come on with Ignition:
ON
23
2.0
ASR MIL (A1e22) does not come on with Ignition:
ON
23
3.0
ASR MIL (A1e22) comes on while engine is running, DTC
in memory
Hydraulic Test
33
1.0
,
2.0
23
2.0
ABS MIL (A1e17) comes on while engine is running, after applying brakes or on a dynamometer
VSS implausible due to different VSS from front and rear axle
12
1) Observe Preparation for Test, see
22
.