996 Carrera Group 0 Part 1 Diagnosis / PAGE 342
8.21 PSM On/Off switch circuit · Test Work instruction Result Possible causes of fault
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911 Carrera (996) PSM diagnosis
8.21 PSM On/Off switch circuit
Test Work instruction Result Possible causes of fault
T01 I est: short to ground/ Greater No:
open circuit in power supply circuit than 11 V -Short circuit to ground or open circuit
oetween:
Ignition off PSM On/Off switch
Pull wiring harness plug off of: wiring harness plug (wiring harness
'SM On/Off switch side)terminal 4
.Measure voltage betweenthe andI
following terminals: lfuse E10
PSM On/Off switch
wiring harness plug (wiring harness Note: Check fuse E10 and the voltage
side) terminal 4 at the input side of fuse E10 for furtherItroubleshooting.
Check the wiring
land. Inarnessfor oinching:or chafing damage.
I~~O_~~~'_I" I._'" :- _:___1 -: :.. 102 Test: voltage short in signal circuit Lessthan No:
0.3 V -Short circuit to voltage between:
Connectwiring harnessplug to:I PSM control module
PSM On/Off switch wiring harnessplug (wiring harness
Pull wiring harnessplug off of: side)terminal 20
)SMcontrol module and
Ignition on PSM switch
Measure voltage betweenthe wiring harness plug (wiring harness
Tollowingterminals: side)terminal 2
PSM control module or
wiring harness plug (wiring harness -PSM switch faulty
side) terminal 20
and-Rround Note: Check the wiring harnessfor
Yes: TO3 pinchi!!g~rJ;lIafing~m~ge.
45 -D 279
II
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