996 Carrera Group 0 Part 1 Diagnosis / PAGE 299
8.3 CAN bus communication circuit · Test Work instruction Result Possible causes of fault
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8.3 CAN bus communication circuit
Test Work instruction Result Possible causes of fault
T01 Test: voltage short in signal circuit Less than No:
11 V -Short circuit to voltage between:
Ignition off PSM control module wiring harness plug
Pull wiring harnessplug off of: (wiring harness side) terminals 24, 40
PSM control module and
and PSM steering-angle sensor wiring
PSM steering-anglesensor harness plug
and (wiring harness side) terminals 2, 1
DME control module and
Ignition on DME control module wiring harness plug
Measurevoltage betweenthe IV
following terminals: (wiring harness side) terminals 36, 37
PSM control module wiring harness
Iplug (wiring harness side) terminals 24, Note: The connection points 135, 136
40 are located betweenthe PSM control
and module and the DME control module.
round Yes: TO2 These must also be checked.
TO2 Test: short to ground in signal Greater No:
circuit than 500 -Short circuit to ground between:
kOhm PSM control module wiring harness plug
Ignition off (wiring harness side) terminals 24, 40
Measure resistance between the and --
Tollowingterminals: PSM steering-anglesensor wiring
PSM control module wiring harness harness plug:(wiring
plug harness side) terminals 2, 1
iwiring harness side) terminals 24, 40 and
and DMEcontrol module wiring harness plug
ground IV
(wiring harness side) terminals36, 37
Note: The connection points 135, 136
are located betweenthe PSM control
module and the DME control module.
IYes:103 These must also be checked.
45 -D 236
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