996 Carrera Group 0 Part 1 Diagnosis / PAGE 278
FC I reste~~ay fault text Remedy · 4480 Booster pump
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911 Carrera (996) PSM diagnosis
FC I reste~~ay fault text Remedy
4480 Booster pump 8.13
.Booster pump voltage actual value is evaluated and displays an implausible value
.Short circuit to ground/voltage or open circuit in the circuit to control module
terminals 2, 3, 4
Effect:
.PSM function is switched off
Possible cause of fault:
.Booster pump motor blocked/faulty
.Wiring/plug connection faulty
Note: Do not jumper the pump; it must not run dry under any circumstances!
Affected terminals:
I12.3, 4
4607 Control module faultyI t<eplace
Internal functional check hydraulic
Effect:I unit
PSM function is switched offI
ABS function is switched off
ASR function is switched off
Possible cause of fault:
PSM control module faulty
Affected terminals:
4802 Undervoltage 18.2
.Internal functional check for control module
.Voltage is less than 9.8 V (control module, rate-of-turnsensor, and steering-angle
sensor power supply)
.Vehicle speed is greater than 6 km/h
Note: once the vehicle voltage is within the permissiblevoltage range again, the
PSM system is switched back on and the indicator lights go out.
Effect:
.PSM function is switched oft
.ABS function is switched oft
.ASR function is switched oft
Possible cause of fault:
.Vehicle voltage was too low
.Connection to the PSM control module faulty:Affected
terminals:
:1,5.23
45 -D 215
I
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