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Camshaft Sensor wiring P0341 rundown pinout issue question

eddielee
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eddielee

eddielee

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Posted

I have been diagnosing my Camshaft sensor issue after installing a new ECU in my 1999 5sp Manual 2500.

I have been going through the article:

http://articles.mopar1973man.com/3rd-generation-dodge-cummins/60-obdii-error-codes/312-p0341-camshaft-position-cmp-sensor-signal

I am using the pin-out from the FSM to locate the wire positions in the ECU connector and the sensor connector. There are numbers on the ECU connector for reference.

I have found the conducting wire which actually goes to the Ecu connector in spot 9 instead of spot 17 as specified in the pin-out. There is full continuity between the Pin C in the cam sensor connector and pin 9 in the Ecu connector. I was about to cut and solder due to diagnostic specifications and lack of continuity of the specified pins, Then I noticed the color of the wires is different.

I would appreciate any understanding as to why this is the case and help me to find the best solution to my issue. And replacing the cam sensor is a major PiTA...

 

Below is the ECU pin-out in the FSM

ENGINE CONTROL MODULE (DIESEL) - 50 WAY
CAV CIRCUIT FUNCTION
1 H104 18BR/OR IDLE VALIDATION SWITCH NO. 1
2 K244 20YL/DB CUMMINS BUS (+)
3 K6 18VT/WT 5V SUPPLY
4 K14 18BK/DB SENSOR GROUND
5 F18 18LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
6 G60 18GY/BK ENGINE OIL PRESSURE SENSOR SIGNAL
7 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
8 G12 18GY/RD MANIFOLD AIR PRESSURE SENSOR SIGNAL
9 - -
10 K7 18OR 5V SUPPLY
11 K104 18BK/LB SENSOR GROUND
12 K246 20YL/DG CUMMINS BUS (-)
13 K242 20WT DATA LINK (+) FUEL INJECTION PUMP
14 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
15 K135 18YL/WT TRANSFER PUMP SUPPLY
16 H105 18LG/DB IDLE VALIDATION SWITCH NO. 2
17 K124 18GY CAMSHAFT POSITION SENSOR SIGNAL
18 K48 18DG FUEL INJECTION PUMP SYNC SIGNAL
19 - -
20 - -
21 K1 18DG/RD WATER IN FUEL SENSOR SIGNAL
22 V37 18RD/LG SPEED CONTROL SWITCH SIGNAL
23 K240 20BK DATA LINK (-) FUEL INJECTOR PUMP
24 V32 18YL/RD BRAKE SWITCH SENSE
25 H102 18LB/BK ACCELERATOR PEDAL POSITION SENSOR SIGNAL
26 G113 18OR PTO SWITCH SENSE
27 - -
28 K22 18OR/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
29 S21 18YL/BK AIR INTAKE HEATER RELAY NO.1
30 Z12 18BK/TN GROUND
31 H101 18DB/WT ACCELERATOR PEDAL POSITION SENSOR SUPPLY
32 H103 18BK/YL ACCELERATOR PEDAL POSITION SENSOR GROUND
33 K45 18LB/RD FUEL SHUT-OFF SIGNAL
34 K44 18VT/OR LOW IDLE SELECT
35 K135 18YL/WT TRANSFER PUMP SUPPLY
36 K131 18BR/WT FUEL INJECTOR PUMP RELAY CONTROL
37 G85 18OR/BK WAIT-TO-START WARNING INDICATOR DRIVER
38 D21 18PK/DB SCI TRANSMIT
39 D20 18DG SCI RECEIVE
40 D2 18WT/BK CCD BUS (-)
41 D1 18VT/BR CCD BUS (+)
42 K247 20DB CUMMINS BUS SHIELD
43 G7 18WT/OR VEHICLE SPEED SENSOR SIGNAL
44 K243 20OR/BR DATA LINK SHIELD FUEL INJECTOR PUMP
45 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
46 - -
47 S22 18OR/BK AIR INTAKE HEATER RELAY CONTROL NO. 2
48 A14 18RD/WT FUSED B(+)
49 Z12 18BK/TN GROUND
50 A14 18RD/WT FUSED B(+)

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Haggar

Haggar

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Eddie,

I printed out my pinout from the 2001 FSM.  I quickly browsed yours vs mine and saw no differences, but you may want to look more closely.

I did notice the Article you are referencing is in the 3rd gen section.  The two wiring  diagrams most likely will NOT be the same.    The theory for testing MAY transfer, but actual wire locations and functions Will be different.

HTH!

Hag

2001 FSM Ram 8W-80-40.pdf

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eddielee

eddielee

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Thank you Haggar,

I posted my issue on cummins forum and jibayes posted one he has for me to see. His matches my ECM connector and wiring so I think the one I downloaded from here, which I posted, is for different model even though it is listed as 1999.

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eddielee

eddielee

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Okay,

I am looking at the 2nd gen 24V P0341 cam sensor diagnostic and see some discrepancies with what I have.

Before I was using the 3rd gen and I found that 9, 10, & 11 go to the sensor directly. 9 is sensor signal tn/yl, 10 is power to the sensor Or, and 11 is the ground Blk/LB. They are all continuous and show continuity.

I am not sure what the (B)+ shown below is but that is where the ground from the sensor goes.

I am tempted to break the ground wire near the sensor and connect it to a ground somewhere to see if this solves the issue.

I checked the voltage in the Cam sensor connector with the key on: between A&B I get 4.97V between A&C I get 4.91V, between B&C I get no voltage at all.

Any thoughts On what to do next?

 

20151228_102116_zpsngozqruj.jpg

3 hours ago, Mopar1973Man said:

99 Wiring diagram...

http://articles.mopar1973man.com/images/2ndgen24v/wiring/1999-Dodge-Wiring-Pg2.jpg

http://articles.mopar1973man.com/images/2ndgen24v/wiring/2002-Dodge-Wiring-pg3.jpg

 

 

I see the first says 1999 and the second says 2002 and it says you edited it.

The first one, linked below, I saw was right

http://articles.mopar1973man.com/images/2ndgen24v/wiring/1999-Dodge-Wiring-Pg3.jpg

 

Edited by eddielee
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eddielee

eddielee

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I checked resistance from ground to all 3 at sensor connector in three different settings.

200k C=46.7 B=0 A=1.7

20k C=OL B=0 A=2.44

2k C=OL B=0 A=OL

Not sure what this means exactly

Edited by eddielee
clarity CORRECT PINS IN TEST
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eddielee

eddielee

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Okay, I was just testing the resistance between the ECM and the cam sensor harness.

I stuck my probe in the 10 spot and tested to A in cam harness, 0-.001 ohms

Test 10 to B and 1.543 ohms on sound setting should this be?

When I test to ground I get open line.

If I need to repair this how should I go about it? This circuit runs parallel with the absolute pressure and oil sensors, which is part of the reason I am unsure if this is good.

Edited by eddielee
more info
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eddielee

eddielee

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Found manifold pressure sensor right side of manifold on bottom.

Unplugged manifold and oil pressure sensors now I get no continuity between A&B

Okay, I have done further testing.

With the oil pressure sensor plugged back in I get open line

with MAP plugged back in resistance is 1.59.

Question is should this be, or do I need to replace the MAP sensor?

Codes are only thrown for Camshaft position sensor.

Stopped by Oreilly and had them pull a MAP sensor. Resistance on it was 1.5 across the sensor supply and return posts. That definitely rules out MAP causing the issue.

Time to return the ECM and hope they have another I guess... Blah

 

Edited by eddielee
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