996 Carrera Group 0 Part 1 Diagnosis / PAGE 335
8.18 Booster pump pressure sensor circuit · Test Work instruction Result Possible causes of fault
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8.18 Booster pump pressure sensor circuit
Test Work instruction Result Possible causes of fault
TOI Test: short to ground/ Approx.5 V No:
open circuit in power supply circuit -Display 0 V:
Short circuit to ground/open circuit in
Ignition off circuit between:
Pull wiring harness plug off of: PSM control module
Booster pump pressure sensor wiring harnessplug (wiring harness
Ignition on side)terminal 42
Measure voltage between the and
ollowing terminals: booster pump pressure sensor
Booster pump pressure sensor wiring harnessplug (wiring harness
wiring harness plug (wiring harness side)terminal 3
side) terminal 3
and -Display greater than 11 V:
ground Short circuit to voltage between:
PSM control module
wiring harnessplug (wiring harness
side)terminal 42
and
booster pump pressure sensor
wiring harness plug (wiring harness
side)terminal 3
'or
Yes: T02Approx.-PSM control module faultv
1102 Test: open circuit in ground circuit 5 V No:
Open circuit in circuit between:
.Measure voltage between the JSM control module
following terminals: wiring harness plug (wiring harness side)
booster pump pressure sensor terminal 25
wiring harness plug (wiring harness and
side) terminal 3 Dooster pump pressure sensor
and wiring harnessplug (wiring harness side)
booster pump pressure sensor terminal 1
wiring harness plug (wiring harness or
side) terminal 1 103 ~ PSM control module faulty
45 -D 272
Yes:
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