996 Carrera Group 0 Part 1 Diagnosis / PAGE 180
8.6 Front left wheel-speedsensor circuit · Test Work instruction Result Possible causes of fault
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911 Carrera 4 (996) PSM diagnosis
8.6 Front left wheel-speedsensor circuit
Test Work instruction Result Possible causes of fault
'TOI voltage short in signal circuit Lessthan No:
0.3 V -Short circuit to voltage in the circuit
Ignition off between:
.Pull wiring harnessplug off of: PSM control module wiring harness plug
PSM control module (wiring harness side) terminals 8, 10
.Ignition on and
.Measure voltage betweenthe plug connection X 1/4
following terminals: terminals 14, 15
PSM control module wiring harness and
plug terminal 8 front left speed sensor
and terminals 5, 4
ground
Note: Disconnect the plug connection
X 1/4 (terminals 14, 15) for further
troubleshooting. The connection points
141 and 142 are located in the wiring
harness. Check the wiring harness for
Yes: 102 I?1!:!fbl!:!~Qr chafing damage.
TO2 Test: short to ground in signal Greater No:
circuit than 500 -Short circuit to ground in the circuit
kOhm between:
.Ignition off PSM control module wiring harness plug
.Measure resistance betweenthe (wiring harness side) terminals 8, 10
following terminals: and
PSM control module wiring harness plug connection X 1/4
plug (wiring harness side)terminal 8 terminals 14, 15
and and
ground front left speed sensor
terminals 5, 4
Note: Disconnectthe plug connection
X 1/4 (terminals14, 15) for furthertroubleshooting.
The connectionpoints
141 and 142 are located in the wiring
narness. Check the wiring harnessfor~g-9!--fbafing
Yes: TO3 damage.
45 -D 117
IITest:I.
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