Bulletin No.: PIT5700C
Published date: 06/28/2021

Preliminary Information
PIT5700C Service Front Camera Message
Models
Brand:

Model:

Model Years:

VIN:
from

Engine:

to

Transmissions:

Chevrolet

Blazer

2019 - 2021

All

All

All

All

GMC

Acadia

2019 - 2021

All

All

All

All

Cadillac

XT5

2017 - 2021

All

All

All

All

Supersession Statement
This PI is superseded by PIT5700B. Please discard all copies of PIT5700A.
Involved Region or
Country

North America

Condition

A vehicle may be brought to the dealer with a message "Service Front Camera" or
"Service Driver Assist". Upon inspection of the vehicle it may be found that all active
safety system functions including adaptive cruise control and (LKA) lane keep assist
appear to work as designed or it may be found that LKA or adaptive cruise control
are inoperative. It may be noted that the LKA indicator in the DIC does not come on.
There may be no DTC's stored for the FVCM systems.

Cause

Loss of low speed communication to the K124 ASCM (Active Safety Control Module)
or the B174W Front View Camera Module (FVCM)

Correction:
Verify that the B174W FVCM is communicating on the low speed bus and if the vehicle is
equipped with UGN also verify that the K124 ASCM is communicating on the low speed bus.
To confirm communication connect the data bus diagnostic tool to the vehicle, select the
"detected state" tab and select "DLC terminal 1". Look through the list of communicating
modules and ensure that the B174W and K124 (if equipped with UGN) are both on the list.

If it is found that the K124 ASCM is not communicating on low speed (with UGN) inspect circuit 5060 for an open
in the harness near JX300.
On Blazer JX300 is located at the base of the B pillar.
On Acadia JX300 is located on the oor near the driver seat.
See # 1 below:

If an open is found repair the circuit following SI Serial Data Circuit Wiring Repairs.
If it is found that the B174W FVCM is not communicating on low speed, inspect X203 at the base of the A pillar for
bent, loose or backed out terminals.
If both modules are communicating on low speed follow SI for diagnosis of concern.

Warranty Information
For wiring repairs covered under warranty, please refer to latest version of bulletin 10-00-89-005 for warranty
information on wire/connector repairs.

Additional SI Keywords
assist, camera, communication, control, cruise, driver, front, FVCM, JX300, low, message, no, service, speed,

Version History
Version

Modi ed

4
08/02/2019 - Created on.
11/04/2019 - Updated to add GMC Acadia and UGN RPO.
03/27/2020- Updated to add XT5
06/28/2021- Updated model years

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