Bad CPS/CKS?

[yukon101]

I have been testing the rest of the remaining sensors until I came across the CPS and CKS, the both tested as open circuit no matter the ohm settings or if I jiggle the connections. As I test I decided to try and start the car without the CKS (crank position sensor) and it would not fire like normal, when reconnected it fired up perfectly fine. I tested the CPS (cam position) same open circuit but would still fire with or without. I did test the muiltimeter and it tested good too. Thoughts?

[shogun]

Maybe you tested the wrong way, try again based on this
crankshaft position sensor testing
updated by Bentley Publishers especially for the M60 engine, before there was 1200 Ohm mentioned by mistake

Ignition Coil Resistance (M60 engine) Terminals Resistance Coil primary 1 (–) and 15 (+) 0.8 Ω (approx.)
Using digital multimeter, check resistance between terminals 1 and 2 in crankshaft position/rpm sensor connector.

Crankshaft Position/rpm Sensor Specifications
• Coil resistance (approx.) @ 20°C . . . . . . 540 ± 10% Ω
• Air gap (sensor distance from
toothed wheel) . . . . . . . 1.0 ± 0.3 mm (0.04 ± 0.01 in.)
https://wiki.bentleypublishers.com/d...=1306522675840
if that link does not work, go here http://www.bimmerboard.com/forums/posts/1072189/

cylinder recognition sensor coil resistance at 20 degree C <1 Ohm pin 1 and 2, pin 2 and 3 Mohm >10 https://www.bmwtechinfo.com/repair/m...ges/941288.jpg

[yukon101]

I think I skipped out trying pins 1 and 2 everything else I have seen and my old Bentley said 1 and 3. I have two Bentleys and I always seem to grab the oldest.

[shogun]

In contrast to the camshaft sensor, the engine does not run without or with a defective crankshaft position sensor.
All sensors on the E32 have a resistance of 540 + -10% ohm between PIN 1 and PIN 2.
Between PIN 3 and 1 or 2, an infinite resistance is measured.

[yukon101]

So my crank sensor after being retested tested fine, cam sensor however did not. What would be the symptoms of a bad cam position sensor? On an unrelated note what are the symptoms of a bad intake air temp sensor?

[yukon101]

I may have just made a breakthrough in my diagnosis of my big issue. Correct me if I am wrong but the camshaft position sensor connects to the passenger side cable duct and the crank sensor connects to the driver side,if this is the case and I really hope it is then somehow mine were switched and my crank sensor is passenger and cam is driver.

[shogun]

this is from the M1.1 and M1.3, but basis is the same for your Motronic

Limited Operating Strategy (LOS)
In the event of a serious fault in one or more of the sensors or their wiring circuits, Motronic will substitute a fixed default value in place of the defective sensor. This procedure is often termed limp home. A serious fault occurs when the signal from the sensor is outside of its normal operating parameters. When operating in LOS the engine may actually run quite well with failure of one or more minor sensors. Since the substituted values are those of a hot engine, cold starting and running during the warm-up period may be less than satisfactory. Also, failure of a major sensor, ie the AFS, will tend to make driving conditions less easy. Once the fault has cleared, Motronic will once more accept the live signal from the sensor. The following LOS measures are taken in the event of a failure

Component..............................Action
AFS........................substitute values are calculated from the TS position. The load signal is fixed to 6.0 ms and the ignition timing to 20° BTDC once the TS contact is open.

ATS........................substitute value of 50° C . A code will not be set, and LOS will not commence until a minimum of 3 minutes after engine start and the engine idling for a minimum of 30 seconds.

CID sensor.............injectors are pulsed simultaneously

CO pot..................substitute value of 2.77 volts

CTS...................substitute value of 80° C if ATS value is greater than 20° .
if ATS value is less than 20° , substitute value of ATS value for first three minutes after engine start-up.

OS.....................substitute value, open loop control

TS.....................substitute values, restricted engine operation

http://www.bimmerboard.com/forums/posts/1256627/