NHTSA ID Number: 11002032
Manufacturer Communication Number: S2408000063
TSB/Document Date: 2024-06-25
Summary
Service Hybrid Electric Vehicle System Warning Message And Light Are Displayed. B273C-00 - Digital Crash Input Set In HCP
Case Number: S2408000063
Release Date: June 2024
Symptom/Vehicle Issue: Service Hybrid Electric Vehicle System Warning Message
And Light Are Displayed. B273C-00 - Digital Crash Input Set In HCP
Discussion: The Customer may bring their vehicle in for service because the “Service
Hybrid
Electric Vehicle System Warning” message and Light are displayed in the
cluster. The vehicle may no longer enter Electric or Hybrid drive modes. Upon
scanning for DTC’s, you may find B273C-00 set in the Hybrid Control Processor
(HCP).
This issue may be caused by Electromagnetic Interference (EMI) from the High
Voltage (HV) P2 Motor and associated HV harnesses which can transfer inductive
voltage/electric noise onto the R41 - Airbag Deployment Signal and R414 - Airbag
Deployment Signal 2 circuits. This inductive voltage/electric noise corrupts the health
status signal and causes the B273C-00 – Digital Crash Input DTC to set.
Diagnosis: Connect an oscilloscope such as the Mopar PicoScope to the R41 and
R414 circuits. When the P2 motor engages and begins operating, look for a distinctive
change in the voltage pattern which would confirm the presence of induction voltage/
electrical noise, See Fig. 1. Some EMI on these circuits is expected during normal
operation; however, some vehicles will exhibit more than others. If the electric noise is
beyond the acceptable threshold, B273C-00 – Digital Crash Input will set in the HCP
almost immediately after the noise is detected on the oscilloscope.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
Stellantis US LLC
Version 4.5 06/08/2022
Fig. 1 :Electrical Noise on R41 and R414 Circuit After P2 Motor Engagement
Fig 2: Airbag Deployment Signal Circuits (R41 and R414)
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
Stellantis US LLC
Version 4.5 06/08/2022
Repair: To ensure this is not a simple wiring issues, you should perform the B273C-00
Digital Crash Input DTC diagnostics flow chart in Service Library before attempting any
other repairs.
If you were unable to determine root cause by following the DTC diagnostics.
Replacement of the components listed below have been found to possibly remedy this
concern on some vehicles. Replacement of these components does not guarantee
repair. The components are listed in order (1-4) based on how common their
replacement has yielded successful repair of this issue in the field. These potential
repairs should be performed to mitigate buy back risk.
As a reminder, STAR Online Cases do not authorize warranty repairs. Replace
these parts at your own discretion after speaking with your dealers management.
Each line item should be replaced one at a time in the order listed below. With
verification replacement resolved the concern or not prior to replacing the next
component.
1.
2.
3.
4.
P2 to PIM HV Harness: 68593176AB
P1 to PIM HV Harness: 68593175AB
BPCM to IDCM and BPCM to PIM HV Harnesses: 68378608AF and
68593178AC (Replace only these at the same time)
ORC (Reference STAR Parts for Part # and review TechTip)
Always verify you have the most current part number by referencing the vehicles VIN in
STAR parts.
This issue is currently being investigated by engineering. The root cause has not
been identified at this time. The field will be updated when a definitive resolution
becomes available.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
Stellantis US LLC
Version 4.5 06/08/2022
Note: ORC Engineering has confirmed that airbag deployment and operation is not
compromised due to this fault or it’s setting conditions. The vehicle can be safely
released to the customer until a resolution is found. However, the “Service Hybrid
Electric Vehicle System Warning” message and MIL will continue to be displayed.
Electric and Hybrid drive modes will be inoperative as long as the B273C-00 – Digital
Crash is Active.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
Stellantis US LLC
Version 4.5 06/08/2022
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TSB/Document ID: S2408000063
Replacement Service Bulletin Number:
MFR Communication Date: 2024-06-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System: Transmission
MFR Component Subsystem:
Previous TSB | Next TSB |
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