NHTSA ID Number: 10201296
Manufacturer Communication Number: PIT5700C
Summary
This Preliminary information communicates that a vehicle may come to the dealer with a “service front camera” message. The technician is instructed to use the data bus tool to determine if the front view camera module and active safety module are both communicating on the low speed bus. If the technician determines that one of the modules is not communicating on low speed the tech is instructed of areas to inspect the low speed communication line, 5060 for possible opens and repair them per SI.
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)
11 Affected Products
Vehicles
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5700C
Published date: 06/28/2021
MC-10201296-9999.pdf 867.994KB
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Bulletin No.: PIT5700C Published date: 06/28/2021 Preliminary Information PIT5700C Service Front Camera Message Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to 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All GMC Acadia 2019 – 2021 All All All All Cadillac XT5 2017 – 2021 All All All All Supersession Statement This PI is superseded by PIT5700B.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 floor 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 4 Modified 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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