Decided to service my reservoir valve block today with new o rings. Used gap tool to deflate system, jacked the truck, removed valve block, replaced o-rings and re-installed.

Turned ignition on and boom, suspension fault light is now on (was not previously on).

Anyone have any ideas how to troubleshoot where I went wrong on this one? Any common causes for this?

 

What does the GAP tool say the fault is for?

 

Cleared codes, re-checked electrical connections.

Here are the codes that I've got:

VIN: SALAC24446A365636
L319 - LR3 2006
Vehicle scanned on 22-05-2020 13:24
Using IIDTool BT V4.0 B2691

Audio System

• B1D21-13 (2F) Remote control switch - General electrical failure - circuit open
  ( on 22-05-2020 12:46:04 at 289208 km )

Body Control

• B1B02-28 (2F) Low frequency coil - General signal failure - signal bias level is out of range/zero adjustment failure
  ( on 22-05-2020 12:46:07 at 289200 km )
• B1C57-14 (6C) Passive start ignition relay coil circuit - General electrical failure - circuit short to ground or open
  ( on 22-05-2020 12:45:56 at 289200 km )
• B1D12-15 (2E) Volumetric alarm power circuit - General electrical failure - circuit short to battery or open
  ( on 22-05-2020 12:46:48 at 289200 km )
• U0155-87 (2E) Lost communication with instrument cluster control module - Bus signal/message failure - missing a message
  ( on 22-05-2020 12:48:14 at 289200 km )

Suspension

• C1A00-53 (AF) Control module - System programming failure - deactivated
  ( on 22-05-2020 12:45:42 at 289208 km )

Ventilation

• B1B74-00 (2C) Front foot-defrost mode stepper actuator
• B1B75-00 (6C) Front foot-face mode stepper actuator
  ( on 22-05-2020 12:46:04 at 289208 km )
• B1B76-00 (6C) Front left air blend stepper actuator
  ( on 22-05-2020 12:46:04 at 289208 km )
• B1B77-00 (6C) Front right air blend stepper actuator
  ( on 22-05-2020 12:46:04 at 289208 km )
• B1B82-00 (6C) Rear air distribution stepper actuator
  ( on 22-05-2020 12:46:04 at 289208 km )
• B1B83-00 (6C) Rear air blend stepper actuator
  ( on 22-05-2020 12:46:04 at 289208 km )

 

Did you connect the plug for the valve? For the compressor? Kinda have to guess its a wiring issue.

 

I keep checking them. Just disconnected and reconnected all four plugs in that area again, making sure they were aligned correctly just in case but no luck. Two connect to the block. And then there are two other connectors. Aggravating issue for sure!

 

When does the fault come on, right away or after a bit. Does the compressor run?

Sounds like you have all the plugs. The compressor has two, one grey operations connector then power. The center valve has two also, one for gallery pressure and the other for activation.

 

Think I solved it by goofing around with the gap tool. Went into service/test -> RLM suspension -> Re-enable EAS.

Maybe this step was required because I deflated the system?

PUMPED!

 

Yeah, that will do it. Even tight tolerance mode causes a fault/warning. You always need to back out of whatever you did. By deflating the bags you deactivated the EAS.