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

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