Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 171

45
Antilock brake system 828
Possible fault displays via system tester 9288
DTCs of the PSD and ABS
DTC Fault type
11
12
13
14
15
Transvene lock valve
Lateral acceleration sensor -
short circuit/discontinuity
Lateral acceleration sensor -
signal implausible
Transvene lock - deviation
Control unit - defective
21 Wheel speed sensor, front left ABSIPSD
22 Wheel speed sensor, front right ABSIPSD
23 Wheel speed sensor, rear right ABSIPSD
24 Wheel speed sensor, rear left
ASSIPSD
31 ABS valve, front left ABS
32 ABS valve, front right
ABS
33 ABS valve, rear axle ABS
34 Valve relay (hydraulic unit) ABSIPSD
35 Return pump (hydraulic unit)
ABS
System allocation
PSD
PSD
PSD
PSD
ABSIPSD
Notes on troubleshooting
Troubleshooting I fauit descnption for the above faults are explained under PSD diagnosismmuble-
shooting in Repair Manual Vol. 3 (Transmission) (Page D39-223).
a
Faults occurring in the high-pressure hydraulics of the PSD (lock operation) are not stored in the
DTC memory of the ABS I PSD control unit. Troubleshooting I fault description is
also
included in
Repair Manual Vol. 3 (Page D39-247).
45-010
Vehicles with PSD
a
Printed in Germany Xxxv, 1995