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For 1990-2009 cars only

Articulating Running Board Diagnostic Codes Incorrect - keywords accessory articulated assist boards boy brs code disabled dtc information intermittent inop inoperative module p0090 p00c0 p00c1 p0085

Subject:Articulating Running Board Diagnostic Codes Incorrect - keywords Accessory Articulated Assist Boards Body BRS Code Disabled DTC Information Intermittent Inop Inoperative Module P0090 P00C0 P00C1 P00C1 P0085 P0085 Part PIINSI PIT4360 Power Program Runningboard Side Step Steps

Models:2007 Cadillac Escalade, Escalade ESV, Escalade EXT
2007 Chevrolet Avalanche, Suburban, Tahoe
2007 GMC Yukon, Yukon XL, Yukon Denali Models
with Articulating Running Boards (RPO BRS)



The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Some customers may state that the articulating running boards are inoperative or inoperative at times. After normal diagnosis, you will notice some of the following current or history codes: P0090 P00C0 P00C1 P00C1 P0085 P0085 set in the Assist Step Module. These codes are inaccurate, and you will not find them in SI.

Recommendation/Instructions:

The inaccurate codes displayed are due to Tech 2 software concern. If you experience an Articulating Running Board concern with one of the " P " codes listed above, Use the following conversion table to determine which description and DTC to look for in SI, based on which " P " code is displayed. The Tech 2 software should be corrected with the April 26, 2007 Tis- 2- Web release.

Code Set

Symptom Code

Description

Correct DTC

P0090

00

Electronic Control Unit (ECU) Performance

B1000 39

P00C0

73

Control Module Communication Bus Off

U0073

P00C1

40

Lost Communication With Body Control Module

U0140

P00C1

99

Lost Communication With Door Control Module A

U0199

P00C2

00

Lost Communication With Door Control Module B

U0200

P0085

1A

Left Side Assist Step Motor Control Circuit

B051A

P0085

1A

Right Side Assist Step Motor Control Circuit

B051B

P0085

1C

Left Side Assist Step Position Sensor Circuit

B051C

P0085

1D

Right Side Assist Step Position Sensor Circuit

B051D

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.