| Diagnostic trouble code (DTC) |
Possible cause |
Test step/Remedy 1) |
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No fault in system |
In case of complaint:  23 and 33 (entire test) |
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ABS/ASR control module (N30/1) |
Replace N30/1. |
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Left front axle VSS sensor (L6/1), open circuit |
23  13.0 |
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Right front axle VSS sensor (L6/2), open circuit |
23 15.0 |
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Left rear axle VSS sensor (L6/3), open circuit |
23 17.0 |
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Right rear axle VSS sensor (L6/4), open circuit |
23 19.0 |
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Left front axle VSS sensor (L6/1), implausible |
23 13.0 |
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Right front axle VSS sensor (L6/2), implausible |
23 15.0 |
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Left rear axle VSS sensor (L6/3), implausible |
23 17.0 |
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Right rear axle VSS sensor (L6/4), implausible |
23 19.0 |
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VSS (L6/1, L6/2, L6/3, L6/4), implausible 2) |
23 13.0
23 15.0
23 17.0
23 19.0
Visually inspect. |
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ABS/ASR hydraulic unit, solenoid valve relay (A7/3k1) |
23 7.0 |
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ABS/ASR hydraulic unit, left front axle solenoid valve (hold) (A7/3y6) |
23 21.0 |
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ABS/ASR hydraulic unit, left front axle solenoid valve (release) (A7/3y7) |
23 22.0 |
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ABS/ASR hydraulic unit, right front axle solenoid valve (hold) (A7/3y8) |
23 23.0 |
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ABS/ASR hydraulic unit, right front axle solenoid valve (release) (A7/3y9) |
23 24.0 |
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ABS/ASR hydraulic unit, left rear axle solenoid valve (hold) (A7/3y10) |
23 25.0 |
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ABS/ASR hydraulic unit, left rear axle solenoid valve (release) (A7/3y11) |
23 26.0 |
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ABS/ASR hydraulic unit, right rear axle solenoid valve (hold) (A7/3y12) |
23 27.0 |
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ABS/ASR hydraulic unit, right rear axle solenoid valve (release) (A7/3y13) |
23 28.0 |
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ABS/ASR hydraulic unit, switchover/solenoid valve (A7/3y5) |
23 29.0 |
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ABS/ASR hydraulic unit, return solenoid valve (A7/3y14) |
23 30.0 |
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ASR system pressure too low |
23 10.0,
33 |
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ABS/ASR hydraulic unit, cycling module/high-pressure return pump (A7/3n1), ABS/ASR hydraulic unit, high-pressure/return pump (A7/3m1) |
23 8.0,
33
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ASR charging pump relay module (K20) |
Wiring,
23 31.0,
33 |
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Brake fluid level too low |
23 11.0,
Check brake fluid level/
remedy cause.
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Stop lamp switch (S9/1) |
23 9.0 |
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Battery voltage too low |
23 1.0 |
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CAN data bus to EA/CC/ISC control module (N4/1), interrupted |
32.0,
Read out DTC memory for EA/CC/ISC control
module (N4/1): see DM, Engines, Vol. 3, section 6.4 >11. |
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CAN data bus to Engine control module (N4/3), interrupted |
32.0,
Read out DTC memory for engine
control module (N3/4): see DM, Engines, Vol. 2, section 1.1, >11.
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CAN data bus, interrupted |
32.0,
Read out DTC memory for EA/CC/ISC control module (N4/1): see DM, Engines, Vol. 3,
section 6.4, >11.
Read out DTC memory for engine
control module (N3/4): see DM, Engines, Vol. 2, section 1.1, >11.
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