Code 31, what's the impact of it? (2 problems actually)

Originally Posted by Robm3

Right then, I have the manual and it says to check the ECU when running to see if a current is coming through (Brown plug, pin 3 from memory). Can I pull the whole 'Brown' plug when the engine is running though? or do I need to just take out pin 3?

Unplug the brown connector first. Then probe. With the brown connector unplugged the vehicle will not start. Do not unplug it with the vehicle running.

Thanks for the info Jeff

No problem.

[Robm3]

Originally Posted by Jeffvette

Unplug the brown connector first. Then probe. With the brown connector unplugged the vehicle will not start. Do not unplug it with the vehicle running.



No problem.

Jeff,
Sorry to be a pain but just to be sure,
step 1. unplug the brown plug and connect probe
step 2. then turn the engine over?
Presume it won't start as you say but will show a reading?


Manual is a little unclear as it says 'test with engine running' naturally that's a little tricky if you can't unplug the brown plug when running although can always 'splice' into the wire and test.

What book are you using?

Step 1:
Engine idling is code 31 present

If yes

Step 2
Ignition off
Disconnect brown connector
Probe D3 for voltage
Crank engine
Did DVM display 0-5 volts

Step 3
Ignition off
Disconnect cam sensor
Connect test light between terminal A & C of harness
Ignition on
Is test light on


Step 4
Connect test light between A and ground
Is test light on

[Tyler Townsley]

Long ago when mine threw a 31 it was the ECM not the sensor. You might have to borrow an ecm to check it out.

Tyler