996 Carrera Group 0 Part 1 Diagnosis / PAGE 320
8.13 Booster pump circuit · Test Work instruction Result Possible causes of fault
Read extracted page text
OCR can contain errors. Check the original page image for exact wording, warnings and specifications.
911 Carrera (996) PSM diagnosis
8.13 Booster pump circuit
Test Work instruction Result Possible causes of fault
T01 ITest: short to ground/ Greater No: I,
open circuit in power supply circuit than 11 V Short circuit to ground or open circuitI
oetween:
Ignition off PSM control module
Pull wiring harness plug off of: wiring harness plug (wiring harness side)
.SM control module terminal 2land
Measure voltage between theI
following terminals: ITuseFl
PSM control module;
wiring harness plug (wiring harness Note: Check fuse Fl and the voltage at
side) terminal 2 the input side of fuse F1 for further
and troubleshooting. Check the wiring
ground T02 narness for pinching or chafing damage.
TO2 Test: voltage short in signal circuit i Less than No:
10.3V i- Short circuit to voltage between:
I- Ignition on PSM control module
I.Measure voltage betweentheI wiring harness plug (wiring harness side)
following terminals: terminal 4
PSM control module and
wiring harness plug (wiring harness PSM booster pump
side) terminal 4 wiring harness plug (wiring harness side)
and terminal 1
ground
Note: Check the wiring harness forI
Yes: 103 oinching~r chafing dama2e. -
8
45 -D 257
III'Yes:
This is a source reference. Confirm exact model applicability in the original material.