ISUZU NQR NRR Diesel Truck ABS and ADAS Recalibration Guide

This instruction show you guide on how to recalibrate anti-lock brake system and advanced driver assistance system for ISUZU NQR and NRR diesel truck.

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AFFECTED VEHICLES

• 2022 – 2023MY Isuzu NQR/NRR Diesel Vehicles Produced After 7/26/2021 With RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications

This bulletin supersedes previous campaign bulletin CB23-H-001. This bulletin is being updated to include US and Canada sample owner letters. Please discard previous campaign bulletin CB23-H-001.

INFORMATION

 

CONDITION

Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022 – 2023MY Isuzu N-Series Diesel Vehicles produced after 7/26/2021 with RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications. When the subject vehicles were modified to extend the frame, the Anti-lock Brake System (ABS) module was not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve, the Electronic Stability Control (ESC) system, working together with the ABS, may react prematurely or be delayed in reacting, therefore increasing the risk of a crash.

If the vehicle is equipped with the optional Advanced Driver Assistance System (ADAS), the ADAS camera was also not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve with the optional ADAS system activated, the Automatic Emergency Braking System (AEBS) and its accompanying warning light may be delayed in reacting and illuminating, also increasing the risk of a crash.

 

CORRECTION

Isuzu dealers will recalibrate the ABS Control Module with the correct wheelbase length and, for the subject vehicles equipped with the optional ADAS (RPO I5D), reprogram the Stereo Camera. This service will be performed free of charge.

 

VEHICLES INVOLVED

Involved are certain 2022 – 2023MY Isuzu NQR/NRR Diesel Vehicles produced after 7/26/2021 with RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications.

Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using IVIS (Isuzu Vehicle Information System).

For dealers with involved vehicles, a report of involved vehicles containing the complete vehicle identification numbers has been or will be provided. Dealers will not have a report available if they have no involved vehicles currently assigned.

 

SERVICE PROCEDURE

1Look up the VIN in the Isuzu Vehicle Information System (IVIS) and confirm the wheelbase option code and length in the “Vehicle Build” section. (This information will be needed to complete the ABS recalibration.) For reference, RPO Code EM2 indicates a 200” wheelbase and RPO Code EL5 indicates a 212” wheelbase.

2Shift vehicle to park, turn off engine, set parking brake, and block rear wheels.

3Connect IDSS to the vehicle, click on the “Auto Detect” button and then select “Controller Programming” from the Table of Contents.

4Select “ABS Setup” under Antilock Brake System and follow the prompts to reprogram the ABS ECU.

5When prompted, select the correct wheelbase for the vehicle being programmed from the drop-down box.

6If the vehicle is equipped with ADAS (RPO I5D), select YES from the drop-down box; if it is not equipped with ADAS (RPO I5D), select NO.

7Follow the prompts from IDSS to complete the ABS ECU programming.

8After the ABS ECU programming is completed:

9. If the vehicle is equipped with ADAS (RPO I5D), proceed to Step 9.
10. If the vehicle is NOT equipped with ADAS (RPO I5D), proceed to Applying the Campaign Label.

9Refer to and follow the instructions in the “Stereo Camera Programming” section of the appropriate Service Manual in IDSS to reprogram the ADAS Stereo Camera.

10After completing the Stereo Camera Programming, proceed to Applying the Campaign Label.

 

For more guide about ISUZU,please refer to:ISUZU Trouble Repair.