996 Carrera Group 0 Part 1 Diagnosis / PAGE 303
PSM diagnosis 911 Carrera (996) · 8.5 Stop light switch circuit
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PSM diagnosis 911 Carrera (996)
8.5 Stop light switch circuit
fest Work instruction Result Possible causes of fault
TOl Test: short to ground/open circuit Greater No:
in signal 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 37
.Ignition on and
.Measure voltage between the ignition lock terminal 15
following terminals: or
PSM control module -Stop light switch faulty
wiring harness plug (wiring harness
sid~) terminal 37 Note: The jumper plug 14/2, fuse 87
and and the connection point 124 are
ground located in the wiring harness. Check the
wiring harnessfor pinching or chafingI
Yes:T02 damage.
102 Test: voltage short in signal circuit Less than NO:
0.3 V -Short circuit to voltage between:
Brake pedal actuated PSM control module
Measurevoltage between the wiring harness plug (wiring harness side)
following terminals: terminal 37
PSM control module and
wirilng harness plug (wiring harness stop light switch terminal 4
side) terminal 37 or
and I -Stop light switch faulty
I I grgund Iyes: 103
45 -D 240
I
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