Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 1/2023 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Cam Sensor Chronic Issue 900 1993

posted by  B.B. on  Mon Jul 22 15:06 CST 2024
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Ag,

It turns out there's an early and late CPS.
Early CPS 1389567-7 Between pin 1 & 2 240 Ohms and a max of 400 ohms when engine is hot.
Late CPS 3547847-8 same pins read approx 170 ohms and a maximum of 350 ohms when the engine is hot. (I think you have the late model)
No high resistance shorts from pins 1 & 2 to pin 3 allowed.

Looking at the tach circuitry, It is in common with pin 1 of the power stage and the coil. Maybe the problem is corrosion at the power stage connector or a wonky power stage? Renew the thermal compound while you're at it.

Bill






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Cam Sensor Chronic Issue [900][1993]
posted by  AVL940T  on Thu Jul 18 11:18 CST 2024 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.