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Body acceleration sensor, front left: Diagnosis/troubleshooting

WARNING: This page is about a different car, the 2006 Porsche Cayenne, 2005 Porsche Cayenne, 2004 Porsche Cayenne, and 2003 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Work instruction Display OK If not OK
1 Check power supply for front left body acceleration sensor
  • Switch off ignition.
  • Pull off plug on front left body acceleration sensor.
  • Switch on ignition.
  • Measure voltage between plug of front left body acceleration sensor 'pins 1 and 3'.
 ~ 5 V
Go to Step 2		 Repair or replace wiring harness.
→ End
2 Check wiring between front left body acceleration sensor and level control module for short circuit to B+
  • Switch off ignition.
  • Pull plug B off level control module.
  • Pull off plug on front left body acceleration sensor.
  • Switch on ignition.
  • Measure voltage between level control module plug B 'pins 94, 102, 111' and ground.
 < 0.3 V
Go to Step 3		 Repair or replace wiring harness.
→ End
3 Check wiring between front left body acceleration sensor and level control module for short circuit to ground
  • Switch off ignition.
  • Measure resistance between level control module plug B 'pins 94, 102, 111' and ground.
 ∞ Ω
Go to Step 4		 Repair or replace wiring harness.
→ End
4 Check wiring between front left body acceleration sensor and level control module for open circuit
  • Measure resistance between level control module plug B 'pins 94, 102, 111' and front left body acceleration sensor 'pins 2, 3, 1'.
 < 5 Ω
Go to Step 5		 Repair or replace wiring harness.
→ End
5 Check wiring between front left body acceleration sensor and level control module for short circuit with respect to each other
  • Measure resistance in the individual level control module wires on plug B between 'pins 94 and 102', 'pins 94 and 111', and 'pins 102 and 111'.
 ∞ Ω
Go to Step 6		 Repair or replace wiring harness.
→ End
6 Replace front left body acceleration sensor → End Go to Step 7
7 Replace level control module → End
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