18-NA-114
Service Bulletin Details
Public Details for: 18-NA-114
This service bulletin provides repair information to correct a customer concern of service all wheel drive (awd)/service stability messages and/or low oil pressure shut off engine message displayed on driver information center (dic), errati
Models from 2020
2020 CHEVROLET TRAX |
Models from 2019
2019 CHEVROLET TRAX |
Models from 2018
2018 CHEVROLET TRAX |
Service Bulletin Bulletin No.: 18-NA-114 Date: May, 2022 TECHNICAL Subject: Intermittent Service All Wheel Drive (AWD)/Service Stability Messages and/or Low Oil Pressure Shut Off Engine Message Displayed in Driver Information Center (DIC), Erratic Speedometer Readings, No Crank, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0641, P2535, U0073, U0100, U0101, U0121, U0131, U0136 and/or U1814 Set Brand: Model: Chevrolet Trax Model Year: VIN: from to from to 2018 2020 — — Involved Region or Country Engine: Transmission: 1.4L (LUV) — North America, Israel, Argentina, Colombia, Ecuador, Paraguay, Uruguay Note: Not all of the effects or driver notifications listed have been experienced. However, the different effects and driver notifications may be caused by one of the wires in the wiring harness being chafed or cut. Components on different lines in the list below are in different circuits. Due to the cause of the condition, and the positions of the wires in the harness, it is unlikely that more than one circuit and/or fuse will be affected by the condition. Condition Some customers may comment on one or more of the following conditions: • MIL is illuminated • Service AWD message displayed on DIC • Service Stability message displayed on DIC • Low Oil Pressure Shut Off Engine message displayed on DIC • Erratic speedometer readings • No crank Technicians may find one or more of the following DTCs set: • P0641: 5V Reference 1 Circuit set in the Engine Control Module (ECM) • P2535: Ignition On/Start Switch Circuit High Voltage • U0073: Control Module Communication Bus A Offset in the ECM or TCM • U0100: Multiple state of health messages, set in the ECM or TCM • U0101: Lost Communication with Transmission Control Module • U0121: Lost Communication with Electronic Brake Control Module • U0131: Lost Communication with Power Steering Control Module • U0136: Lost Communication with Differential Control Module - Rear • U1814: Powertrain Wake-Up Communication Circuit Technicians may also find fuse F18UA open. Note: This is a multi-wire bundled harness and, depending on which wire is damaged, can set a variety of DTCs. Cause This condition may be caused by the engine harness chaffing against the G100 Ground stud. This condition may be caused by damage to the engine harness near the X112 connector. ⇒ Inspect G103 (refer to bulletin 19-NA-068) Copyright 2022 General Motors LLC. All Rights Reserved. Page 2 May, 2022 Bulletin No.: 18-NA-114 Correction 5040432 If the above condition has been validated, inspection of the engine wiring harness must be done. 1. With a suitable light, inspect the wiring harness point of contact at the G100 ground stud. ⇒ For stud location, refer to Document ID#: 4708510 in SI. 2. Repair the harness as needed. ⇒ Refer to Wire to Wire Repair in SI. Bulletin No.: 18-NA-114 May, 2022 Page 3 5040564 3. Using Woven Polyester Electrical Tape (PET), tape all the contact points of the engine harness ensuring that the tape is applied in a double layer. 4. Reposition the engine harness so that it cannot contact the ground stud. ⇒ If required, replace the blown fuse in regards to repair performed on the engine harness. Page 4 May, 2022 Bulletin No.: 18-NA-114 6056400 5. Inspect the engine harness (1) in the engine compartment located on the left side of the engine near the X112 electrical connector (2): 5.1. Remove the battery. Refer to Battery Replacement in SI. 5.2. Inspect wiring approximately 76 mm (3 in) from x112 connector for any signs of damage. 5.3. Repair the harness as needed. Refer to Wire to Wire Repair in SI. 5.4. Install the battery. Refer to Battery Replacement in SI. 6056401 Inspect G103 (refer to bulletin 19-NA-068) Bulletin No.: 18-NA-114 May, 2022 Page 5 Parts Information No parts are required for this repair. Warranty Information For vehicles repaired under warranty, use: Labor Operation 5430902 Description Labor Time Wire-to-Wire Repair Use Published Labor Operation Time Version 9 Modified Released April 12, 2018 May 4, 2018 – Changed the Engine RPO and added Additional Keywords. June 12, 2018 – Updated the Subject and Condition sections to add additional DTCs and conditions. March 28, 2019 – Added the 2019 Model Year. February 3, 2020 – Added the 2020 Model Year. October 9, 2020 – Added DTC U1814 to Subject and Condition section and updated the Involved Region or Country section. October 23, 2020 – Added Low Oil Pressure Shut Off Engine Message information to Subject and Condition section. July 21, 2021 – Added No Crank condition and DTC P2535 to Subject and Condition sections and added Open Fuse F18UA to Condition section. May 6, 2022 – Updated the Cause and Correction sections. Additional SI Keywords: 5V ref, B111B, Turbo boost sensor GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION