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Acoustic Parking System (APS) self-diagnosis
Fault table
Notes:
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◆ Faults occurring in monitored sensors or components are stored in fault memory together with an indication of the type of fault.
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◆ The fault table is arranged according to the 5-digit fault codes on the left.
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◆ All static and sporadic faults are stored in the fault memory:
A fault is recognised as being static if it is present for at least 2 seconds. If a fault is then no longer present, it is stored as being sporadic and "sporadic" also appears on display.
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◆ After switching on ignition, all faults present are set to sporadic and only stored as being static if they are still present after checking.
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◆ Sporadic faults are erased if they do not re-occur in the course of 50 driving cycles (ignition on for at least 5 minutes, vehicle speed greater than 30 km/h).
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◆ Do not immediately replace components indicated as being defective by VAS 5051, but rather: Start by checking wiring and connectors to these components in line with current flow diagram. Also use current flow diagram to check earth connections. This is particularly important if faults are output as being "sporadic".
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◆ On completion of repair work, fault memory is to be interrogated again and erased.
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Display on VAS 5051
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Possible cause of trouble
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Fault remedy
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00532
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Supply voltage
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- Signal too low
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- Open circuit in wiring or short circuit in power supply
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- Use current flow diagram to perform fault-finding
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00625
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Speed signal
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- Implausible signal
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- Fault is set if vehicle-speed signal is implausible (e.g. 500 km/h); occurs, for example, in the event of loose contact in wiring
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- Use current flow diagram to perform fault-finding
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01543
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Parking aid warning buzzer -H15
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- Short to positive
- Open circuit/short to earth
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- Open circuit in wiring or short circuit between -H15 and control unit
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- Use current flow diagram to perform fault-finding
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- -H15 defective
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- Replace -H15
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Display on VAS 5051
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Possible cause of trouble
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Fault remedy
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01545
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RL parking aid sender -G203
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- Short to positive
- Open circuit/short to earth
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- Open circuit in wiring or short circuit between -G203 and control unit
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- Use current flow diagram to perform fault-finding
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- Defective component
- Implausible signal
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- -G203 defective
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- Replace -G203
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01546
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RL, ctr, parking aid sender
-G204
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- Short to positive
- Open circuit/short to earth
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- Open circuit in wiring or short circuit between -G204 and control unit
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- Use current flow diagram to perform fault-finding
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- Implausible signal
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- -G204 defective
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- Replace -G204
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Display on VAS 5051
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Possible cause of trouble
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Fault remedy
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01547
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RR, ctr, parking aid sender
-G205
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- Short to positive
- Open circuit/short to earth
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- Open circuit in wiring or short circuit between -G205 and control unit
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- Use current flow diagram to perform fault-finding
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- Implausible signal
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- -G205 defective
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- Replace -G205
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01548
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RR parking aid sender -G206
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- Short to positive
- Open circuit/short to earth
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- Open circuit in wiring or short circuit between -G206 and control unit
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- Use current flow diagram to perform fault-finding
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- Implausible signal
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- -G206 defective
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- Replace -G206
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Display on VAS 5051
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Possible cause of trouble
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Fault remedy
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01549
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Voltage supply for parking aid sender
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- Short to earth
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- Short to earth between parking aid sender and control unit
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- Use current flow diagram to perform fault-finding
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01550
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Reverse gear signal
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- Short to positive
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- Short to positive between reversing light switch and control unit
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- Use current flow diagram to perform fault-finding
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65535
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Control unit defective
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- Parking aid control unit -J446 defective
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- Replace control unit
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