996 Carrera Group 0 Part 1 Diagnosis / PAGE 241
PSM diagnosis 911 Carrera 4 (996) · 8.32 PSM On/Off switch circuit
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PSM diagnosis 911 Carrera 4 (996)
8.32 PSM On/Off switch circuit
Test Work instruction Result Possible causes of fault
TOI voltage short in signal circuit Less than No:
O.3V -Short circuit to voltage between:
Ignition off PSMcontrol module
.Pull wiring harness plug off of: wiring harnessplug (wiring harness
PSM control module side)terminal 86
.Ignition on:. and
Measurevoltagebetweenthe PSMswitch
followingterminals: wiring harnessplug (wiring harness
PSM control module side)terminal 2
wiring harness plug (wiring harness
side) terminal 86 Note: The plug connection X 1/3
and (terminal9) is located in the wiring
harness.Check the wiring harnessfor ground
Yes: T02 oinchingor chafing damag~
TO2 Test: short to ground in signal Greater No:
circuit than 500 -Short circuit to ground between:
kOhm PSMcontrol modulewiring harnessplug
8 Ignition off (wiring harnessside) terminal 5
8 Measure resistance between the and
following terminals: PSMswitch
PSM control module wiring harnessplug (wiring harness
wiring harness plug (wiring harness side)terminal 2
side) terminal 86
and Note: The plug connection X 1/3
(terminal9) is located in the wiring ground
harness.Checkthe wiring harnessfor
103 D~hing or chafing damage.
45 -D 1781I.Test:Yes:
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