Technical Service Bulletin (TSB)
High Voltage Wiring Repair
REFERENCE:

TSB: 08-082-25 REV. A
GROUP: 08 - Electrical

Date:

April 12, 2025

VEHICLES
AFFECTED:

2021 - 2024 (JL) Jeep Wrangler
This bulletin applies to vehicles equipped with the 2.0L I4 DOHC DI
Turbo PHEV Engine (Sales Code ECX) **and China Country Code
(Sales Code 8BL)**.

REVISION: 08-082-25

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

CUSTOMER
SYMPTOM:

Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
● B273C-00 - Digital Crash Input.
● U0287-00 - Lost Communication With Transmission Fluid Pump Module 1.
Customers may also experience one or more of the following:
● Vehicle shakes during a cold start.
● Noise is heard from the underbody near the P2 motor.

CAUSE:

Water intrusion

This bulletin supersedes Technical Service Bulletin (TSB) 08-082-25, date of issue March 21, 2025,
which should be removed from your files. All revisions are highlighted with **asterisks** and include a
new sales code.
REPAIR SUMMARY:
This bulletin involves repairing the High Voltage (HV) cable harness to the Power Inverter Module (PIM).
CLAIMS DATA:

Labor Operation No:
08-90-16-CH

08-90-16-CR

08-90-16-CN

Failure Codes

Labor Description
P2 Motor Harness
Disassembly and
Assembly
(0 - Introduction)
Repair Plug Connected
To The P2 Motor, Remove
Tie Band + Clean
(0 - Introduction)
Repair Plug Connected
To The PIM Motor,
Remove Tie Band +
Clean
(0 - Introduction)
ZZ

Skill Category
6 - Electrical and Body
Systems

Labor Time
6.7 Hrs.

6 - Electrical and Body
Systems

7.5 Hrs.

6 - Electrical and Body
Systems

7.5 Hrs.

Service Action

J08 FSAR-TSB-5328

-2-

SPARE PARTS:

Qty
(AR)
(AR)

Part No.
NPN
NPN

2
(AR)

111-01190
EC0132

Description
Electrical Tape
Darbond 2598 Sealing
Compound
HellermannTyton
Enient Specialist Contact
Cleaner

Notes
Zip Ties

DIAGNOSIS:
If the customer describes the symptom/condition above, perform the repair procedure.
SPECIAL TOOLS/EQUIPMENT:

Description
HellermannTyton EVO7
wiTECH or Equivalent
Wire Brush

Ref. No.
NPN
NPN

Notes
Tension Tool
-

REPAIR PROCEDURE:

NOTE: Prior to performing the repair, refer to all applicable published Star Online documents before
performing this Repair Procedure.
NOTE: Perform the Repair Procedure unless damage is found. If damage is found, replace the HV
cable harness.
1. Remove the PIM to Transmission HV cable harness Fig. 1. Refer to the detailed service procedures
available in DealerCONNECT/Service Library under: Service Info> 12 - Electrified Powertrain System /
High Voltage Battery / Cables / Removal and Installation.

Fig. 1
HV Cable Harness
2. Inspect the PIM to P2 HV cable harness for rub through or damage near the transmission driveshaft CV
joint shield.

-3-

J08 FSAR-TSB-5328

3. Is the HV cable harness damaged or rubbed through near the transmission driveshaft CV joint shield?
4. ● YES>>> Replace the PIM to Transmission HV cable harness. Proceed to Step 17.
● NO>>> Proceed to Step 5.
5. Using a suitable protective cover and tape, protect both ends of the HV cable harness connectors to
prevent dust and contaminants from entry Fig. 2.
6. Remove the plastic zip tie on the HV cable harness connector rubber sleeve Fig. 2.

Fig. 2
HV Cable Harness Connectors
1 - HV Cable Harness Connecter Zip Ties

7. Fold the rubber sleeve backward to its maximum position to expose the metal mesh shielding Fig. 3.

Fig. 3
HV Cable Harness Exposed Metal Mesh Shielding
1 - Metal Clamp

8. Remove the tape from the shielding layer and remove the metal clamp, then stretch the mesh shielding
layer up forward Fig. 3.
9. Using compressed air, thoroughly clean the shielding layer and the HV wires from contaminants, oxides,
and moisture.
NOTE: The shielding layer and surface must be clean of any debris and contaminants before
proceeding to Step 10.
10. Fold the shielding layer and HV wires and make maximum exposure of the groove Fig. 4.

Fig. 4
HV Cable Harness Connector Grooves Exposed
1 - Zone A Groove
2 - Zone B Groove

J08 FSAR-TSB-5328

-4-

11. Use the wire brush to thoroughly clean the HV cable harness connector end of oxidation and dust in Zone
A and Zone B Fig. 4.
(Optional) Chemical assist removal:
a. Evenly spray ENIENT EC0132 (natural rust remover) on the oxidized and rusted parts of the HV cable
harness connector. For hard to reach spots like grooves and gaps with severe rust, use a soft brush
dipped in the rust remover to ensure full contact with the oxidized and rusted layer.
b. Wait three to five minutes or more for full chelation and dissolution of the oxidation to occur.
c. After oxidation dissolution, wipe and clean the surface of the dissolved oxidization and any residual
cleaning material. Dry the surface with a soft cloth or towel. DO NOT allow this to air dry. An air
compressor gun can also be used expedite the drying of the surfaces.
(Optional) Mechanical grinding:
a. If the oxidization is too severe and cannot be cleaned, sand polish the groove, (DO NOT over polish).
b. Use the air compressor gun to blow away the dust and make the area clean.
12. Put back the metal mesh shielding layer around the HV cable harness connector and use the original metal
clamp to secure the connector and shielding layer. Wrap with electrical tape Fig. 5.

Fig. 5
Proper HV Cable Harness Connector Mesh And Clamp Positioning

-5-

J08 FSAR-TSB-5328

13. Apply Darbond 2598 sealing compound evenly around the tightening area between the HV cable harness
connector and the rubber sleeve in Zone A Fig. 4 and Fig. 6.

Fig. 6
HV Cable Harness Connector Sealed Using Darbound 2598
1 - Sealed HV Cable Harness Connector

14. Reattach the rubber sleeve and secure it within 15 minutes of applying the sealing compound and tighten
the plastic cable tie using the HellermannTyton EVO7 tool to 225 N·m (166 Ft. Lbs.). Repeat the same
process for the other end connector of the HV cable harness Fig. 7.

Fig. 7
HV Cable Harness Connector Sleeve With Cable Tie
1 - Plastic Cable Tie Position On Connector

NOTE: Ensure the zip tie head is positioned on the connector side and thoroughly wipe away any
excess compound.
15. After applying the sealer compound, it is necessary to wait for at least 24 hours to let the compound cure
and achieve a better sealing effect. DO NOT touch or move the sealed area during this period. (Curing
time need be extended to 48 hours in an environment with high humidity or cold temperatures).
16. Remove the plastic bags and tape used to protect the joints on both end HV cable harness connectors.
17. Install the PIM to Transmission HV cable harness. Refer to the detailed service procedures available in
DealerCONNECT/Service Library under: Service Info> 12 - Electrified Powertrain System / High Voltage
Battery / Cables / Removal and Installation.
NOTE: Remind the customer to park the vehicle for two days if possible after picking it up and
avoid driving on harsh road conditions within two days.
18. Clear DTCs.

POLICY:
Reimbursable within the provisions of the warranty.
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.