Hey Jeff, any U- codes stored in any modules ?
U1900
Missing CAN message(s)
Door(s) ajar, PRNDL, 4x4, instrument cluster (IC), running boards, vehicle speed
REFER to Section 418-00 .
U2023
Invalid CAN message(s)
Door(s) ajar, PRNDL, 4x4, instrument cluster (IC), running boards, vehicle speed
REFER to Section 418-00 .
L4 CHECK THE VDM FOR DOOR AJAR INPUT
- Key in ON position.
- Monitor VDM door position status PID.
- Close all doors, liftgate, liftgate glass and power running boards.
- While observing the diagnostic tool, open and close one door.
- Does the door status PID change between CLOSED and AJAR states?
When you open an close the driver door you have no PID change ,right ?
L4 CHECK THE VDM FOR DOOR AJAR INPUT
- Key in ON position.
- Monitor VDM door position status PID.
- Close all doors, liftgate, liftgate glass and power running boards.
- While observing the diagnostic tool, open and close one door.
- Does the door status PID change between CLOSED and AJAR states?
The door ajar input is an input to the Vehicle Security Module , then transmitted over the bus ! You'll have to find a diagram for the med. speed CAN data bus .
would a dealership be the best place to obtain the running board relay
switch. also, would you know if the relay switch is easily accessible
to replace?
thank you
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