NHTSA ID Number: 10183701
Manufacturer Communication Number: TB-20-20-02
TSB/Document Date: 2020-12-05
Summary
Coolant Flush Procedure, to clean out debris, under certain conditions
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
PURPOSE:
Revero GT presenting with over temperature may have been assembled with some debris in the coolant
system. To promote the best possible customer experience, a coolant flush is to be performed, Create a
TSS case for this procedure.
Preparation
1. Place vehicle on lift. Remove all four (4) wheels and front wheel liners.
2 . At the front of the vehicle disconnect hoses from the two (2) low temperature electric coolant
pumps. Drain coolant.
Prepare or work with the following:
- Water pump with minimum power of 1HP (example Utilitech-1-HP-Stainless-Steel-Lawn-Pump, 13
GPM flow rate )
- Hose with Female quick-connect fitting x 2 (use P/N C131138102101 from Karma)
- Hose with Male quick-connect fitting (use P/N C131138101301 from Karma)
The hoses are important for fast flushing as these can connect to the vehicle without disassembly.
- Strainer for catching fluid and debris into a container.
- Several Large container buckets, a large screen for flushing and catching debris
- length of hose for the flush procedure
Male Quick Connect C131138101301
External water pump
Female Quick Connect
C131138101301
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 1 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
left (LH LT) pump
right (RH LT) pump
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma
Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 2 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Pump Inspection
3. Disconnect hoses connecting to 2 LT electric coolant pumps, remove both pumps from skid plate.
4. Inspect inside pump for metal shavings. If there is any visible metal shaving, it needs to be replaced. Take a
photo or image to attach to the TSS case for this procedure
!!!!!!!!! Debris!!!!!!!
Debris found - replace the pump
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 3 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
LT-Cooling Loop FLUSH
5. Connect right side (RH) Pump Outlet Hose to high pressure side of coolant flush equipment
This hose
This hose
6. Connect left side (LH) Pump Inlet Hose to suction side of coolant flush equipment.
Operate coolant flush equipment (follow manufacturer directions of your particular model) to circulate
flush out water for minimum of two (2) minutes.
Caution: Do not exceed maximum pressure of 30psi
Hose shown clamped before draining.
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 4 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Pump Out
collecting
bucket
PUMP
Pump Inlet
- Place strainer under LH LT Hose. This is remove debris from circulating water.
- Operate pump to circulate water for minimum of two (2) minutes
- Fresh water should be used during flushing
old coolant being collected to be
disposed of, screening for debris
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 5 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
OBCM FLUSH
- Disconnect RH Traction Motor Coolant Outlet Hose.
- Attach a hose with male quick connect to the hose and connect it to water pump outlet.
OBCM
disconnect here
View from Bottom
- Attach hose C131138101301 with male quick connect.
- Connect it to pump outlet
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 6 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
TM1 Inverter In
OBCM In
CM
OB
t
Ou
TM2 Inverter Out
The coolant will also be flushed from the rear. This includes the OBCM, and drive motor systems.
The image below provides a map of flow for the rear.
TM2 In
TM2 Out
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 7 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
TM1 Inverter Out
TM2 Inverter In
The image below provides a map of flow for the rear as viewed from the front of the vehicle
TM1 In
TM1 Out
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 8 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
OBCM Flush con’t.
OBCM
Connect a hose C131138101301
with female quick connect here
Remove this tube
Clamp Hose
- Remove Left hand (LH) traction motor outlet tube
- Clamp off LH Coolant hose to stop flow
- Connect a hose with female quick connect to plastic tee.
- This hose is for the draining
Connect a hose C131138101301
with female quick connect here
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 9 of 17
Published: November 2020
TB-20-20-02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
- Place strainer below with this hose and operate the pump for minimum of 2 minutes
- Reverse connections to pump outlet and drain
hose.
- Operate pump for minimum of two (2) minutes
to back flush OBCM
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 10 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
RH Traction Motor (TM2) Flush
Attach C131138101301 hose
with Male quick disconnect,
connect this to pump outlet
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 11 of 17
Published: November 2020
TB-20-20-02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
RH Traction Motor (TM2) Flush part 2
- Disconnect RH Traction Motor Coolant Outlet hose
- Attach hose C131138101301 with female quick connect here and connect it for draining
- Place strainer below with this hose and operate the pump for minimum of 2 minutes
- Reverse connections to pump inlet and outlet.
- Operate pump for minimum of 2 minutes to back flush TM2
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 12 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
TM1 Inverter Out
TM2 Inverter In
LH Traction Motor (TM1) Flush
TM1 In
TM1 Out
- Disconnect LH Traction Motor Inverter Coolant Inlet
- Attach C131138101301 hose with female quick connect to the hose and connect it to
water pump outlet.
- Clamp off the LH supply hose
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 13 of 17
Published: November 2020
TB-20-20-02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
LH Traction Motor (TM1) Flush
Connect drain hose here
- Disconnect LH Traction Motor Coolant Outlet hose
- Attach C131138101301 hose with female quick connect to the hose
for drain
- Place strainer below with this hose and operate the pump for
minimum of 2 minutes
- Reverse connections to pump inlet and outlet.
- Operate pump for minimum of 2 minutes to back flush TM1
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 14 of 17
Published: November 2020
TB-20-20-02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
REINSTALL
Blow shop air through these 2 hoses to
eliminate water inside system
- Reinstall all coolant tubes and hoses on rear drive module
- From front driver (LH) side, blow shop air on both hoses to completely remove water from the
cooling system
- Reinstall two (2) coolant pumps
- Fill coolant with vacuum equipment.
- Apply vacuum for 30 minutes minimum before re-filling coolant.
Pull 25 in. vacuum for more
than 30 minutes before
coolant fill.
- Reinstall coolant pumps & Reconnect all coolant hoses.
- Refill LT cooling system using Vacuum fill equipment. Coolant fill volume is 10 liters.
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 15 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
Low Temp (LT) Powertrain Cooling System
Reservoir
LT Radiator 2
AIR
LT Radiator
RH pump
TB
Gen
Inverter
TM 2
Inverter
TM 2 RH
APM
TM 1
Inverter
TM 1 LH
OBCM
LH pump
Arrows indicate direction of coolant flow.
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 16 of 17
Published: November 2020
TB-20-20-02
Type: Technical Bulletin
Year: 2020
System: Cooling (20)
Sequence: 02
Title: Coolant Flush Procedure
Applicability: MY20 Revero GT
PARTS REQUIRED:
PART NUMBER
N/A
Description
Quantity
Description
Quantity
SHOP SUPPLIES if Required:
PART NUMBER
SUBLET
SPECIAL TOOLS:
Description
N/A
CAUSAL PART:
PART NUMBER
Description
C131138300100
LT Coolant Pump CWA100-3
LABOR CODES:
CODE
20-10-07-07
Description
TIME
DEFECT CODE
Coolant Flush
3.0
20-10-05-48
SUBLET:
CODE
FLU-001
Description
Coolant
AMOUNT
25.00
WARRANTY DISPOSITION: This repair is covered under the New Vehicle Limited Warranty, in effect
for four (4) years from the in-service date with no mileage limitation.
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 17 of 17
Published: November 2020
- Contains Alugard Plus for compatibility with all ethylene...
- Fights corrosion, scaling and rust while protecting all...
- High-quality additives protect against leaks and won’t...
- Pre-mixed yellow formula is ready-to-use in a 50/50 ratio...
- Contains 30 – 50 ppm of denatonium benzoate as a bittering...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- Formulated to replace the OEM fluid in Asian make vehicles...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications...
- Contains 30 – 50 ppm of denatonium benzoate as a bittering...
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TSB/Document ID: TB-20-20-02
Replacement Service Bulletin Number:
MFR Communication Date: 2020-11-17
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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