996 Carrera Group 0 Part 1 Diagnosis / PAGE 200
8.13 Booster pump circuit · Test Work instruction Result Possible causes of fault
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911 Carrera 4 (996) PSM diagnosis
8.13 Booster pump circuit
Test Work instruction Result Possible causes of fault
IrOl short to ground/ Greater No:
open circuit in power supply circuit than 11 V -Short circuit to ground or open circuit
between:
.Ignition off PSM control module
.Pull wiring harness plug off of: wiring harness plug (wiring harness side)
PSM control module terminal 51
.Measure voltage betweenthe and
following terminals: plug connection X 1/3 terminal 20
PSM control module land
wiring harnessplug (wiring harness fuse EI0
side)terminal 51
and Note: Check the voltage at the input
ground side of fuse E 10 or the output side of
Yes:T02 fuse F 7 for.1!Jrtt)ertroubleshooting,
T02 voltage short in signal circuit Less than No:
0.3 V -Short circuit to voltage between:
.Ignition on PSMcontrol module
.Measure voltage betweenthe wiring harnessplug (wiring harness side)
following terminals: terminal 24
PSM control module and
wiring harnessplug (wiring harness PSM booster pump
side)terminal 24 wiring harnessplug (wiring harness side)
and terminal 1
ground
Note: Check the wiring harnessfor
IYes: TO3 pinchingor chafine damaee.
45 -D 137
IITest:Test:
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