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NHTSA ID Number: 10205560
Manufacturer Communication Number: 21NA220
Summary
This service bulletin provides a procedure to inspect and possibly repair terminals that may be damaged to correct customer concerns of Loss of Power, Malfunction Indicator Lamp (MIL) Illuminated, Gauges Inoperative and/or Multiple Warning Lights/Messages Displayed on Driver Information Center (DIC).
4 Affected Products
Vehicle
MAKE | MODEL | YEAR |
CHEVROLET | MALIBU | 2019-2022 |
Condition
Some customers may comment on one or more of the following conditions:
- Loss of power
- MIL illuminated
- Gauges dropping out
- Multiple warning lights and/or messages
Technicians may find one or more of the following DTCs stored in the Engine Control Module (ECM):
– P0700, P150C, P15FD, P2544, P308D, U0073, U0101, U0129, U0140, U0146, U183A, U18D5, U18D7, U2413, U0121, U0100, U0401, U0131
Cause
This condition may be caused by high resistance on the HSCAN BUS circuits 2500/2501 between the Electronic Brake Control Module (EBCM) and the Power Steering Control Module (PSCM).
Correction
With the battery disconnected, verify the resistance of the HSBUS circuits across 2500, 2501 splitting the circuit at the X115 electrical connector. Refer to Master Electrical Component List in SI. Looking for any unwanted resistance (ex. 126.7 or something other than in the range of 120 ohms). If stray resistance is traced down to one of the module connector terminals, verify terminal tension and ensure there is no damage to the terminal. If the terminal is good, then apply dielectric grease to the terminals.
If the terminals are damaged or have poor terminal tension, replace with terminated leads at the suspect module connector and apply dielectric grease to the connector.
Parts Information
Description | Part Number | Qty |
ACDelco Dielectric Lubricant (U.S.) | 12377900 | 1 |
ACDelco Dielectric Lubricant (Canada) | 10953529 |
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-220
Date: November, 2021
TECHNICAL
Subject: Loss of Power, Malfunction Indicator Lamp (MIL) Illuminated, Gauges Inoperative and/
or Multiple Warning Lights/Messages Displayed on Driver Information Center (DIC) –
Multiple DTCs Set
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Chevrolet Malibu 2019 2022 — —
1.5L
Turbo (LFV) —
Involved Region or Country North America, Israel, Palestine
Condition
Some customers may comment on one or more of the following conditions:
• Loss of power
• MIL illuminated
• Gauges dropping out
• Multiple warning lights and/or messages
Technicians may find one or more of the following DTCs stored in the Engine Control
Module (ECM):
– P0700, P150C, P15FD, P2544, P308D, U0073, U0101, U0129, U0140, U0146,
U183A, U18D5, U18D7, U2413, U0121, U0100, U0401, U0131
Cause
This condition may be caused by high resistance on the HSCAN BUS circuits 2500/2501
between the Electronic Brake Control Module (EBCM) and the Power Steering Control
Module (PSCM).
Page 2 November, 2021 Bulletin No.: 21-NA-220
Correction
2220548
2339640
With the battery disconnected, verify the resistance of the HSBUS circuits across 2500,
2501 splitting the circuit at the X115 electrical connector. Refer to Master Electrical
Component List in SI. Looking for any unwanted resistance (ex. 126.7 or something other
than in the range of 120 ohms). If stray resistance is traced down to one of the module
connector terminals, verify terminal tension and ensure there is no damage to the
terminal. If the terminal is good, then apply dielectric grease to the terminals.
If the terminals are damaged or have poor terminal tension, replace with terminated leads
at the suspect module connector and apply dielectric grease to the connector.
Service Procedure
1. Disconnect the battery.
2. Disconnect the X115 engine harness electrical
connector.
⇒ Verify the resistance of the HSBUS circuits
across 2500, 2501 splitting the circuit at the
X115 electrical connector.
3. Remove the radiator surge tank fastener.
4. Disconnect the engine wiring harness clip from the
surge tank.
5. Reposition surge tank aside to gain access to
the EBCM.
Bulletin No.: 21-NA-220 November, 2021 Page 3
5905953
6. Disconnect the K17 EBCM electrical connector.
3960473
7. Inspect for terminal tension/damage at the wiring
harness for circuits 2500/2501.
⇒ If improper terminal tension is found, replace
terminals with terminated leads per SI.
8. Verify the resistance of the HSBUS circuits across
2500, 2501.
9. Add dielectric grease to the terminals.
10. Connect the EBCM connector.
11. Reposition the surge tank.
12. Install the wiring harness clip onto the surge tank.
13. Install the surge tank fastener. Refer to Fastener
Specifications in SI.
14. Raise the vehicle.
5905956
15. Disconnect the K43 PSCM electrical connector.
2586629
16. Inspect for terminal tension/damage at the wiring
harness for circuits 2500/2501.
⇒ If improper terminal tension is found, replace
terminals with terminated leads per SI.
17. Verify the resistance of the HSBUS circuits across
2500, 2501.
18. Add dielectric grease to the terminals.
19. Connect the PSCM electrical connector.
Page 4 November, 2021 Bulletin No.: 21-NA-220
20. Lower the vehicle.
21. Connect the X115 engine harness electrical
connector.
22. Connect the battery.
Parts Information
Causal
Part
Description Part
Number
Qty
N/A
ACDelco
Dielectric
Lubricant*
12377900
(U.S.)
10953529
(Canada)
1
*There is enough material to do additional vehicles. Store
the remaining material for future use.
Warranty Information
Note: Only use the Labor Operation number that
coincides with the repair performed.
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor
Operation
Description Labor Time
5486258*
Terminal Testing/Inspection
and Dielectric Lubricant
Application
1.0 hr
Add EBCM Terminal Repair 0.5 hr
Add PSCM Terminal Repair 0.5 hr
*This is a unique Labor Operation for bulletin use only.
Version 2
Modified
Released October 08, 2021
November 05, 2021 – Added DTC U0073 in the Condition section and Israel, Palestine to
the Involved Region or Country section.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-220
Date: November, 2021
https://www.nhtsa.gov/recalls?nhtsaId=10205560
MC-10205560-9999.pdf 196.447KB
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