Rate-of-turn sensor 996.606.145.00

Fig 1: Identifying Rate-Of-Turn Sensor - Part No. 996.606.145.00 As Of 08/00

Courtesy of PORSCHE OF NORTH AMERICA, INC.

DIAGNOSIS/TROUBLESHOOTING CHART - FAULT CODE 4420 (PART NO. 996.606.145.00 AS OF 08/00)

Work instruction			Display OK	If not OK
1	Check power supply of the rate-of-turn sensor	Switch off ignition Pull plug off the rate-of-turn sensor Switch on ignition Measure voltage between pin 3 of rate-of-turn sensor plug and ground	> 11 V Step 2	Open circuit in circuit between PSM control module plug pin 39 and pin 3 of the rate-of-turn sensor plug, or PSM contol module faulty -> End
2	Check ground of the rate-of-turn sensor	Measure voltage between pin 3 of the rate-of-turn sensor plug and pin 6 of the rate-of-turn sensor plug	> 11 V Step 3	Open circuit in circuit between PSM control module plug pin 21 and pin 6 of the rate-of-turn sensor plug, or PSM contol module faulty -> End
3	Check reference voltage of the rate-of-turn sensor	Measure voltage between pin 1 of the rate-of-turn sensor plug and pin 6 of the rate-of-turn sensor plug	approx. 2.5 V Step 4	Open circuit in circuit between PSM control module plug pin 10 and pin 1 of the rate-of-turn sensor plug, or PSM contol module faulty -> End
4	Check leads from PSM control module to rate-of-turn sensor for short circuit to voltage	Switch off ignition Pull off the PSM control module plug Switch on ignition Measure voltage between pins 1, 2 and 4 of the rate-of-turn sensor plug and ground	< 0.3 V Step 5	Short circuit to voltage between pins 1, 2 and 4 of the rate-of-turn sensor plug and pins 10, 9 and 41 of the PSM control module plug -> End
5	Check leads from PSM control module to rate-of-turn sensor for short circuit to ground	Switch off ignition Measure resistance between pins 1, 2 and 4 of the rate-of-turn sensor plug and ground	< 5 Step 6	Short circuit to ground between pins 1, 2 and 4 of the rate-of-turn sensor plug and pins 10, 9 and 41 of the PSM control module plug -> End
6	Check leads from PSM control module to rate-of-turn sensor for open circuit	Measure resistance between pins 1, 2 and 4 of the rate-of-turn sensor plug and pins 10, 9 and 41 of the PSM control module plug	< 5 Step 7	Open circuit between pins 1, 2 and 4 of the rate-of-turn sensor plug and pins 10, 9 and 41 of the PSM control module plug -> End
7	Check leads from PSM control module to rate-of-turn sensor for short circuit	Measure resistance between pin 1 of the rate-of-turn sensor plug and pins 2 and 4 of the rate-of-turn sensor plug Measure resistance between pin 2 of the rate-of-turn sensor plug and pin 4 of the rate-of-turn sensor plug	Step 8	Short circuit in wiring harness between pins 1, 2 and 4 of the rate-of-turn sensor plug and pins 10, 9 and 41 of the PSM control module plug -> End
8	Rate-of-turn sensor faulty		-> End