996 Carrera Group 0 Part 1 Diagnosis / PAGE 223
PSM diagnosis 911 Carrera 4 (996) · 8.24 Switch-over valve 1 circuit
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PSM diagnosis 911 Carrera 4 (996)
8.24 Switch-over valve 1 circuit
!Test instruction Result Possible causes of fault
Test: voltage short in signal circuit ILess than
0.3 V -Short circuit to voltage between:
) Ignition off PSMcontrol module
Pull wiring harnessplug off of: wiring harnessplug (wiring harness side)
PSM control module terminal 49
[andPSM hydraulic unit and
PSM hydraulicunit
Ignition on: wiring harnessplug (wiring harness side)
Measurevoltage betweentheIToliowing terminal 7
terminals:
PSM control module Note: Check the wiring harness for
wiring harnessplug (wiring harnessI pinching or chafing damage.
side)terminal 49
landI
round JYes:102
ITO2 Test: short to ground in signal Greater No:
circuit Ithan 500 -Short circuit to ground between:
,kOhm PSM control module
Ignition off wiring harness plug (wiring harness side)
Measure resistance between the terminal 49
Tollowing terminals:I and
PSM control module PSM hydraulic unit
IWiring harness plug (wiring harness wiring harness plug (wiring harness side)
side) terminal 49 terminal 7
and
ground Note: Checkthe wiring harnessfor
T03 pinchingor ch~ng damage.
45 -D 160
:WorkII'No:IYes:IrOl
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