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Hybrid/ev Cooling System Buick Regal V

Body Electrical 21 illustrations ~8683 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Accessory DC Power Control Module Cooling Air Duct Fasteners1.5 N.m13 lb in
Air Conditioning and Drive Motor Cooling Compressor Bolt22 N.m16 lb ft
Air Conditioning and Drive Motor Cooling Compressor Nut22 N.m16 lb ft
Air Conditioning Compressor and Condenser Hose Bolt22 N.m16 lb ft
Air Conditioning Compressor and Condenser Hose Nut17 N.m12 lb ft
Air Conditioning Compressor Front Hose Bracket Bolt17 N.m12 lb ft
Air Conditioning Compressor Front Hose Bolt22 N.m16 lb ft
Air Conditioning Compressor Front Hose Nut22 N.m16 lb ft
Air Conditioning Compressor and Evaporator Hose Nut17 N.m12 lb ft
Air Conditioning Refrigerant Pressure Sensor6 N.m53 lb in
Air Conditioning Thermal Expansion Valve Bolt7 N.m62 lb in
Air Distribution Case Screw3 N.m27 lb in
Air Inlet Fastener2.5 N.m23 lb in
Air Inlet Housing Fastener2.5 N.m23 lb in
Air Inlet Valve Actuator Gear Screw1.5 N.m13 lb in
Blower Motor Control Module Screw2 N.m17 lb in
Bracket Heater Core Inlet Tube Bolt2.5 N.m23 lb in
Bracket Heater Core Outlet Tube Bolt2.5 N.m23 lb in
Heater Inlet and Outlet Pipe Bolt17 N.m12 lb ft
Heater Coolant Heater9 N.m80 lb in
Heater Water Shutoff Valve Nuts9 N.m80 lb in
HVAC Module Assembly Fastener10 N.m89 lb in
Instrument Panel Center Air Outlet Duct Fasteners1.5 N.m13 lb in
Mode Actuator Screw1.5 N.m13 lb in
Side Window Defogger Outlet Duct Fasteners1.5 N.m13 lb in

Fastener Tightening Specifications

Scheme 207

Scheme 207: Starter/Generator Wiring Schematics
Scheme 207: Starter/Generator Wiring Schematics

Scheme 208

Scheme 208: Battery Pack Wiring Schematics
Scheme 208: Battery Pack Wiring Schematics

Diagnostic Code Index

DTCDescription
DTC P0AAD-P0AAFDTC P0AAD Hybrid Battery Pack Air Temperature Sensor Performance DTC P0AAE Hybrid Battery Pack Air Temperature Sensor 1 Circuit Low Voltage DTC P0AAF Hybrid Battery Pack Air Temperature Sensor 1 Circuit High Voltage
DTC P0A7EDTC P0A7E Hybrid Battery Pack High Temperature
Drive Motor Battery Cooling Blower Malfunction - DTC P0A81-P0A85 or P0D64-P0D66DTC P0A81 Hybrid Battery Pack Cooling Fan Control Circuit DTC P0A84 Hybrid Battery Pack Cooling Fan Control Circuit Low Voltage DTC P0A85 Hybrid Battery Pack Cooling Fan Control Circuit High Voltage DTC P0D64 Hybrid Battery Pack Cooling Fan Enable Circuit DTC P0D65 Hybrid Battery Pack Cooling Fan Enable Circuit Low Voltage DTC P0D66 Hybrid Battery Pack Cooling Fan Enable Circuit High Voltage
DTC P0A9C-P0A9E, P0AC6-P0AC8, P0ACB-P0ACD, P0AE9-P0AEB, P0BC3-P0BC5, or P0C34-P0C36DTC P0A9C Hybrid/EV Battery Temperature Sensor 1 Performance DTC P0A9D Hybrid/EV Battery Temperature Sensor 1 Circuit Low Voltage DTC P0A9E Hybrid/EV Battery Temperature Sensor 1 Circuit High Voltage DTC P0AC6 Hybrid/EV Battery Temperature Sensor 2 Performance DTC P0AC7 Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage DTC P0AC8 Hybrid/EV Battery Temperature Sensor 2 Circuit High Voltage DTC P0ACB Hybrid/EV Battery Temperature Sensor 3 Performance DTC P0ACC Hybrid/EV Battery Temperature Sensor 3 Circuit Low Voltage DTC P0ACD Hybrid/EV Battery Temperature Sensor 3 Circuit High Voltage DTC P0AE9 Hybrid/EV Battery Temperature Sensor 4 Performance DTC P0AEA Hybrid/EV Battery Temperature Sensor 4 Circuit Low Voltage DTC P0AEB Hybrid/EV Battery Temperature Sensor 4 Circuit High Voltage DTC P0BC3 Hybrid/EV Battery Temperature Sensor 5 Performance DTC P0BC4 Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage DTC P0BC5 Hybrid/EV Battery Temperature Sensor 5 Circuit High Voltage DTC P0C34 Hybrid/EV Battery Temperature Sensor 6 Performance DTC P0C35 Hybrid/EV Battery Temperature Sensor 6 Circuit Low Voltage DTC P0C36 Hybrid/EV Battery Temperature Sensor 6 Circuit High Voltage
DTC P0C32DTC P0C32 Hybrid/EV Battery Pack Cooling System Performance
DTC P0CBD-P0CBFDTC P0CBD Drive Motor "A" Coolant Temperature Sensor Performance DTC P0CBE Drive Motor "A" Coolant Temperature Sensor Circuit Low DTC P0CBF Drive Motor "A" Coolant Temperature Sensor Circuit High
Generator Control Module Coolant Pump Malfunction - DTC P0CC1-P0CC4DTC P0CC1 Drive Motor "A" Coolant Pump Control Circuit/Open DTC P0CC2 Drive Motor "A" Coolant Pump Control Circuit Range/Performance DTC P0CC3 Drive Motor "A" Coolant Pump Control Circuit Low DTC P0CC4 Drive Motor "A" Coolant Pump Control Circuit High

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The battery energy control module monitors an inlet air temperature sensor that is located at the inlet of the hybrid/EV battery pack. This temperature sensor is a variable resistor that measures the air temperature of the incoming air which is used to heat and cool the hybrid/EV battery sections and the internal electronics of the starter/generator control module. The battery energy control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The inlet air temperature sensor resistance changes with temperature of the incoming inlet air. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The starter/generator control module will control the hybrid/EV battery pack cooling fan based on the inlet air temperature and hybrid/EV battery temperature sensors.

The starter/generator control module performs a rationality diagnostic that compares the air Inlet temperature sensor output signal to the average battery temperature of the six battery cell temperature sensors. This diagnostic gets one chance to run during a drive cycle after a specific vehicle OFF time.

Conditions for Running the DTC

P0AAD

  1. Ignition is RUN or CRANK
  2. Starter/generator control module off time is greater than 6 hours
  3. Starter/generator control module off time is not faulted (starter/generator control module internal clock diagnostic)
  4. None of the following DTCs are set: P0AAE, P0AAF, P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AEA, P0AEB, P0BC3, P0BC4, P0BC5, P0C34, P0C35, P0C36, P262B, U0100, U182A

P0AAE and P0AAF

  1. Ignition OFF
  2. The 12 V battery voltage is greater than 8.8 V.
  3. DTC P1A5D is not set

Conditions for Setting the DTC

P0AAD

The air inlet temperature is more than 10°C (18°F) higher or lower than the average battery cell temperature

P0AAE

The air temperature sensor signal is greater than 87°C (188.6°F)

P0AAF

The air temperature sensor signal is less than -39°C (-38.2°F)

Action Taken When the DTC Sets

DTCs P0AAD, P0AAE, and P0AAF are type B DTCs

Conditions for Clearing the DTC

DTCs P0AAD, P0AAE, and P0AAF are type B DTCs

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification

Ignition ON, observe the scan tool battery energy control module Hybrid Battery Inlet Air Temperature parameter. The parameter should be between within 40°C (72°F) of the average battery cell temperature.

Circuit/System Testing

WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF, disable the high voltage at the A4 hybrid/EV battery pack. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) .
  2. Disconnect the X2 harness connector at the K16 battery energy control module.
  3. Test for 8-13k ohms at 22°C (71.6°F) between the signal circuit terminal 3 and the low reference circuit terminal 8. If not between 8-13k ohms Inspect the signal circuit and low reference circuit for a short to voltage, short to ground, or an open/high resistance. If a short to voltage, short to ground, or an open/high resistance is found, attempt to repair the circuit. If a repair cannot be made, replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If a short to voltage, short to ground, or an open/high resistance is not found Replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If between 8-13k ohms
  4. Replace the K16 battery energy control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Generator Battery Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system)
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for battery energy control module replacement, programming, and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Six temperature sensors are used to monitor the battery temperature. The battery temperature sensors are located in the battery sections. Two of the temperature sensors are located on the top of the battery section and the remaining four are located on the bottom of the section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group. The battery energy control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The battery temperature sensor resistance changes with battery temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases.

  1. The starter/generator control module and battery energy control module are awake and communicating
  2. None of the following DTCs are set: P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEA, P0AEB, P0B45, P0B46, P0B47, P0B48, P0B4F, P0B50, P0B51, P0B52, P0B63, P0B64, P0B65, P0B66, P0B95, P0B96, P0B97, P0B98, P0B9F, P0BA0, P0BA1, P0BA2, P0BC3, P0BC4, P0BC5, P0C34, P0C35, P0C36, or P1A5D

The battery temperature as measured by the temperature sensors is greater than 72.3°C (162.1°F)

DTC P0A7E is a type B DTC

DTC P0A7E is a type B DTC

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

For equivalent regional tools, refer to Special Tools .

  1. Visually inspect the inlet and outlet of the hybrid/EV battery pack cooling fan ducts.
  2. Verify the inlet and outlet are free of any debris or obstructions that will limit airflow through the duct. If any debris or obstructions are found Remove the obstruction to allow proper airflow and allow the hybrid/EV battery pack to cool before retesting. If no debris or obstructions are found
  3. Verify the hybrid/EV battery pack cooling fan ducts are properly secured and are not crimped, crushed, or deformed in a manner that will limit airflow through the duct. If the ducts are unsecured or damaged Repair or replace as necessary and allow the hybrid/EV battery pack to cool before retesting. If the ducts are properly secured and undamaged
  4. Ignition ON.
  5. Verify the scan tool battery energy control module Battery Temperature parameters are all be between -39° and 60°C (-38.2 and 140°F). If not between -39° and 60°C (-38.2 and 140°F) Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If between -39° and 60°C (-38.2 and 140°F)
  6. All OK.
WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF, disable the high voltage at the A4 hybrid/EV battery pack. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) .
  2. Using the scan tool, determine which battery temperature sensor is not between -39° and 60°C (-38.2 and 140°F).
  3. Disconnect the X3 and X4 harness connectors at the K16 battery energy control module.
  4. Test for 8-13k ohms at 22°C (71.6°F) between the appropriate temperature sensor signal circuit terminal and the low reference circuit terminal listed below: Temperature sensor 1 - Signal circuit terminal 2 X2 and low reference circuit terminal 7 X2 Temperature sensor 2 - Signal circuit terminal 1 X2 and low reference circuit terminal 6 X2 Temperature sensor 3 - Signal circuit terminal 4 X2 and low reference circuit terminal 9 X2 Temperature sensor 4 - Signal circuit terminal 2 X3 and low reference circuit terminal 7 X3 Temperature sensor 5 - Signal circuit terminal 1 X3 and low reference circuit terminal 6 X3 Temperature sensor 6 - Signal circuit terminal 4 X3 and low reference circuit terminal 9 X3 If not between 8-13k ohms Inspect the signal circuit and low reference circuit for a short to voltage, short to ground, or an open/high resistance. If a short to voltage, short to ground, or an open/high resistance is found, attempt to repair the circuit. If a repair cannot be made, replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If a short to voltage, short to ground, or an open/high resistance is not found Replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If between 8-13k ohms
  5. Replace the K16 battery energy control module.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Generator Battery Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system)
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for battery energy control module replacement, programming, and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
B+P0A84P0A84
ControlP0D65P0D66P0D66P0D64
Signal Terminal 21111
Signal Terminal 3P0A84P0A84P0A85P0A81
GroundP0A84
1. Fan speed feedback is not received by the starter/generator control module

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. To operate, the cooling fan receives an enable signal from the starter/generator control module. The enable control is controlled by a discrete high side driver in the starter/generator control module. When the enable control circuit is high, the fan will be enabled. The fan speed is controlled by a fan control circuit in the starter/generator control module, by changing the duty cycle. Maximum fan speed is 3900 RPM. Hybrid/EV battery pack cooling fan Enable circuit open and short to voltage diagnostics run continuously until hybrid/EV battery pack cooling fan is enabled to run while short to ground runs after it is enabled to run. These diagnostics detect and report a failure of the fan Enable circuits.

P0A81, P0A84, or P0A85

  1. Ignition is RUN or CRANK
  2. The hybrid/EV battery pack cooling fan speed is enabled

P0D64 or P0D66

  1. Ignition is RUN or CRANK
  2. The hybrid/EV battery pack cooling fan is not enabled

P0D65

  1. Ignition is RUN or CRANK
  2. The hybrid/EV battery pack cooling fan is enabled

P0A81

An open is detected on the hybrid/EV battery pack cooling fan speed control circuit

P0A84

A short to ground is detected on the hybrid/EV battery pack cooling fan speed control circuit

P0A85

A short to voltage is detected on the hybrid/EV battery pack cooling fan speed control circuit

P0D64

An open is detected on the hybrid/EV battery pack cooling fan enable control circuit

P0D65

A short to ground is detected on the hybrid/EV battery pack cooling fan enable control circuit

P0D66

A short to voltage is detected on the hybrid/EV battery pack cooling fan enable control circuit

DTCs P0A81, P0A84, P0A85, P0D64, P0D65, and P0D66 are type B DTCs

DTCs P0A81, P0A84, P0A85, P0D64, P0D65, and P0D66 are type B DTCs

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Verify the actual hybrid battery pack cooling fan speed increases and decreases when commanding the Hybrid/EV Battery Pack Cooling Fan with a scan tool. If the fan speed does not increase and decrease as commanded Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If the fan speed increases and decreases as commanded
  2. Verify the scan tool Hybrid Powertrain Control Module 14V Power Module Fan Speed parameter increases and decreases when commanding the Hybrid/EV Battery Pack Cooling Fan with a scan tool. If the parameter does not increase and decrease as commanded Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If the parameter increases and decreases as commanded
  3. All OK.
WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the G14 hybrid/EV battery pack cooling fan. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms between the ground circuit terminal 1 and ground. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify a test lamp illuminates between the B+ circuit terminal 5 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the G14 hybrid/EV battery pack cooling fan. If the test lamp illuminates
  5. Connect a test lamp between the control circuit terminal 4 and ground.
  6. Verify the test lamp turns ON when commanding the Hybrid/EV Battery Pack Cooling Fan with a scan tool and OFF when releasing the control. If the test lamp turns is always OFF Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit If less than 2 ohms, replace the K59 starter generator control module. If the test lamp turns is always ON Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for less than 1 V between the control circuit and ground. If 1 V or greater, test the control circuit for a short to voltage. If less than 1 V, replace the K59 starter generator control module. If the test lamp turns ON and OFF
  7. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground. If less than 4.8 V Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit If less than 2 ohms, replace the K59 starter generator control module. If greater than 5.2 V Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, test the signal circuit for a short to voltage. If less than 1 V, replace the K59 starter generator control module. If between 4.8-5.2 V
  8. Connect a 3 A fused jumper wire to the signal circuit terminal 2.
  9. Verify the scan tool Hybrid Powertrain Control Module 14V Power Module Fan Speed parameter is greater than 0 RPM while rapidly tapping the jumper wire to ground. If 0 RPM Replace the K59 starter generator control module If greater than 0 RPM
  10. Connect a test lamp between the signal circuit terminal 3 and B+.
  11. Verify the test lamp becomes progressively dimmer as the fan speed is increased and progressively brighter as the fan speed is decreased when commanding the Hybrid/EV Battery Pack Cooling Fan with a scan tool. If the test lamp does not illuminate Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, test the signal circuit for a short to voltage. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit If less than 2 ohms, replace the K59 starter generator control module. If the test lamp illuminates, but does not change in brightness Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K59 starter generator control module. If the test lamp brightness changes as commanded
  12. Test or replace the G14 hybrid/EV battery pack cooling fan.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Drive Motor Battery Cooling Blower Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for starter/generator control module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Six temperature sensors are used to monitor the battery temperature. The battery temperature sensors are located in the battery sections. Two of the temperature sensors are located on the top of the battery section and the remaining four are located on the bottom of the section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group. The battery energy control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The battery temperature sensor resistance changes with battery temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases.

P0A9C, P0AC6, P0ACB, P0AE9, P0BC3, and P0C34

  1. Starter/generator control module off time is greater than 6 hours
  2. Starter/generator control module off time is not faulted (starter/generator control module internal clock diagnostic)
  3. None of the following DTCs are set: P0A9D, P0A9E, P0AC7, P0AC8, P0ACC, P0ACD, P0AEA, P0AEB, P0B45, P0B46, P0B47, P0B48, P0B4F, P0BC4, P0BC5, P0C35, P0C63, or P1A5D

P0A9D, P0A9E, P0AC7, P0AC8, P0ACC, P0ACD, P0AEA, P0AEB, P0BC4, P0BC5, P0C35, and P0C36

  1. The 12 V battery voltage is greater than 8.8 V
  2. Battery energy control module is awake and communicating
  3. DTC P1A5D is not set

P0A9C, P0AC6, P0ACB, P0AE9, P0BC3, and P0C34

The difference between a single battery temperature sensor and an average of the other battery temperature sensors is greater than 8.6°C (47.5°F)

P0A9D, P0AC7, P0ACC, P0AEA, P0BC4, and P0C35

The hybrid battery temperature sensor is greater than 87°C (188.2°F)

P0A9E, P0AC8, P0ACD, P0AEB, P0BC5, and P0C36

The hybrid battery temperature sensor is less than -39°C (-38.2°F)

DTCs P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEA, P0AEB, P0BC3, P0BC4, P0BC5, P0C34, P0C35, and P0C36 are type B DTCs

DTCs P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEA, P0AEB, P0BC3, P0BC4, P0BC5, P0C34, P0C35, and P0C36 are type B DTCs

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

For equivalent regional tools, refer to Special Tools .

  1. Ignition ON.
  2. Verify the scan tool battery energy control module Battery Temperature parameters are all be between -39° and 60°C (-38.2 and 140°F). If not between -39° and 60°C (-38.2 and 140°F) Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If between -39° and 60°C (-38.2 and 140°F)
  3. All OK.
WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF, disable the high voltage at the A4 hybrid/EV battery pack. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) .
  2. Using the scan tool, determine which battery temperature sensor is not between -39° and 60°C (-38.2 and 140°F).
  3. Disconnect the X3 and X4 harness connectors at the K16 battery energy control module.
  4. Test for 8-13k ohms at 22°C (71.6°F) between the appropriate temperature sensor signal circuit terminal and the low reference circuit terminal listed below: Temperature sensor 1 - Signal circuit terminal 2 X2 and low reference circuit terminal 7 X2 Temperature sensor 2 - Signal circuit terminal 1 X2 and low reference circuit terminal 6 X2 Temperature sensor 3 - Signal circuit terminal 4 X2 and low reference circuit terminal 9 X2 Temperature sensor 4 - Signal circuit terminal 2 X3 and low reference circuit terminal 7 X3 Temperature sensor 5 - Signal circuit terminal 1 X3 and low reference circuit terminal 6 X3 Temperature sensor 6 - Signal circuit terminal 4 X3 and low reference circuit terminal 9 X3 If not between 8-13k ohms Inspect the signal circuit and low reference circuit for a short to voltage, short to ground, or an open/high resistance. If a short to voltage, short to ground, or an open/high resistance is found, attempt to repair the circuit. If a repair cannot be made, replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If a short to voltage, short to ground, or an open/high resistance is not found Replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If between 8-13k ohms
  5. Replace the K16 battery energy control module.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Generator Battery Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system)
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for battery energy control module replacement, programming, and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. To operate, the cooling fan receives an enable signal from the starter/generator control module. The enable control is controlled by a discrete high side driver in the starter/generator control module. When the enable control circuit is high, the fan will be enabled. The fan speed is controlled by a fan control circuit in the starter/generator control module, by changing the duty cycle. Maximum fan speed is 3900 RPM.

The hybrid/EV battery pack cooling system consists of the hybrid/EV battery pack cooling fan pulling air through a set of porous ducts within the hybrid/EV battery pack. These ducts direct air through the hybrid/EV battery sections and under the starter/generator control module, where the air passes by various heat sinks and cavities to cool the internal electronic components. The performance diagnostic for the hybrid battery pack cooling fan is a functional check for the fan. The fan control feature uses the outcome of this diagnostic to take emissions related remedial actions. The hybrid/EV battery pack cooling system performance diagnostic determines if the cooling system is providing the expected amount of conditioning. The hybrid/EV battery pack cooling fan not spinning at the commanded speed or a blocked duct are examples of conditions of reduced performance.

The starter/generator control module uses a temperature model to predict the temperature of the 14 volt power module, an internal electronic component of the starter/generator control module. The starter/generator control module compares this predicted temperature to the 14 volt power module temperature sensor 1. With the hybrid/EV battery pack cooling fan operating, the predicted 14 volt power module temperature and the 14 volt power module temperature sensor 1 should be nearly the same.

  1. Ignition is RUN or CRANK
  2. No power mode DTCs are set
  3. None of the following DTCs are set: P0A81, P0A84, P0A85, P0A88, P0A89, P0AAD, P0AAE, P0AAF, P0D64, P0D65, P0D66, P1A90, P1A92, P1AE8, P1AE9, P1AEC, U182A
  4. Hybrid battery pack temperature is greater than -10°C (14°F)
  5. The battery pack inlet temperature sensor is greater than -10°C (14°F)
  6. The battery pack cooling fan speed is greater than 29%
  7. 14 volt power module power is greater than 0.1 Kwatt
  8. The number of non-faulted battery cell temperature sensors is greater than 4
  9. Propulsion system is active for a minimum of 150 seconds
  10. Within the past 180 seconds, the 14 volt power module mower has not changed more than 0.6 Kwatts over a time of 30 seconds

The predicted temperature of the hybrid/EV battery pack is more than 15°C (27°F) higher or lower than the actual measured 14 volt power module temperature sensor 1

DTC P0C32 is a type B DTC

DTC P0C32 is a type B DTC

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Visually inspect the inlet and outlet of the hybrid/EV battery pack cooling fan ducts.
  2. Verify the inlet and outlet are free of any debris or obstructions that will limit airflow through the duct. If any debris or obstructions are found Remove the obstruction to allow proper airflow and allow the hybrid/EV battery pack to cool before retesting. If no debris or obstructions are found
  3. Verify the hybrid/EV battery pack cooling fan ducts are properly secured and are not crimped, crushed, or deformed in a manner that will limit airflow through the duct. If the ducts are unsecured or damaged Repair or replace as necessary and allow the hybrid/EV battery pack to cool before retesting. If the ducts are properly secured and undamaged
  4. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the G14 hybrid/EV battery pack cooling fan. It may take up to 2 minutes for all vehicle systems to power down.
  5. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms between the ground circuit terminal 1 and ground. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  6. Ignition ON.
  7. Verify a test lamp illuminates between the B+ circuit terminal 5 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the G14 hybrid/EV battery pack cooling fan. If the test lamp illuminates
  8. Verify that the hybrid/EV battery pack cooling fan speed increases and decreases as the Hybrid Battery Fan Speed is commanded from 10%-90% with a scan tool. If the fan speed does not change Replace the G14 hybrid/EV battery pack cooling fan. If the fan speed changes
  9. Monitor the airflow at the intake duct and outlet duct while commanding the Hybrid Battery Fan Speed from 10%-90% with a scan tool. The actual airflow should increase as the fan speed is increased. If the airflow does not increase Ignition OFF, disable the high voltage at the A4 hybrid/EV battery pack. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) . Remove any debris or obstructions that may limit airflow in the cooling ducts through the A4 hybrid battery assembly and the heat sink under the K59 starter/generator control module. If the airflow increases
  10. Verify the scan tool battery energy control module Battery Temperature parameters are all be between -39° and 60°C (-38.2 and 140°F). If not between -39° and 60°C (-38.2 and 140°F) Replace the C4A hybrid/EV battery section 1 and C4B hybrid/EV battery section 2. If between -39° and 60°C (-38.2 and 140°F)
  11. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Generator Battery Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system)
  2. «Drive Motor Battery Cooling Blower Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  3. «Drive Motor Battery Cooling Air Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  4. «Drive Motor Battery Cooling Air Inlet Upper Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  5. «Drive Motor Battery Cooling Blower Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  6. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for starter/generator control module replacement, programming, and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The hybrid electronics coolant temperature sensor is a variable resistor that measures the temperature of the starter/generator coolant. The starter/generator control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The hybrid electronics coolant temperature sensor resistance changes with starter/generator coolant temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The starter/generator control module monitors the hybrid electronics coolant temperature sensor to determine the temperature of the starter/generator coolant. As the coolant temperature changes, the starter/generator control module will turn the starter/generator control module coolant pump ON or OFF to accommodate the starter/generator cooling requirements.

The starter/generator control module performs a rationality diagnostic that compares the hybrid electronics coolant temperature sensor signal to the average temperature of the starter/generator stator, engine intake air temperature, and transmission fluid temperature. This diagnostic gets one chance to run during a drive cycle after a specific vehicle OFF time.

P0CBD

  1. Ignition is RUN or CRANK
  2. Engine off time is greater than 6 hours
  3. starter/generator control module internal clock diagnostic is not faulted
  4. None of the following DTCs are set: P0111, P0112, P0113, P0114, P0711, P0712, P0713, P0A2B, P0A2C, P0A2D, P0CBF, POCBE, P262B, U0100, U0101

P0CBE or P0CBF

  1. Ignition is RUN or CRANK
  2. Starter/generator control module internal coolant temperature monitoring and diagnostics are enabled

P0CBD

The hybrid electronics coolant temperature sensor is more than 25°C (45°F) higher or lower than the average temperature of the starter/generator stator, engine intake air temperature, and transmission fluid temperature.

P0CBE

The drive motor coolant temperature sensor resistance is less than 100.7 ohms.

P0CBF

The drive motor coolant temperature sensor resistance is greater than 176, 962 ohms.

DTC P0CBD-P0CBF are type B DTCs

DTC P0CBD-P0CBF are type B DTCs

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

For equivalent regional tools, refer to Special Tools .

  1. Verify the coolant level of the starter/generator cooling system is normal. If the coolant level is low Inspect the starter/generator cooling system for any leaks. If the coolant level is normal
  2. Verify the starter/generator cooling system auxiliary radiator is clear of any debris, bent fins, or other damage which may inhibit airflow. If debris are found Clean the auxiliary radiator. If damage is found Replace the auxiliary radiator. If no damage or debris are found
  3. Verify the starter/generator cooling system hoses are properly routed and are not kinked. If any hoses are improperly routed or kinked Removed and properly route the hose. If all hoses are routed properly and are not kinked
  4. Ignition ON.
  5. Verify the scan tool Motor A Coolant Temperature Sensor parameter is between -40°C and 85°C. If not between -40°C and 85°C Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If between -40°C and 85°C
  6. All OK.
WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF, disconnect the harness connector at the B204A hybrid/EV battery pack coolant temperature sensor 1.
  2. Test for less than 10 ohms between the low reference circuit terminal B and ground. If 10 ohms or greater Ignition OFF, disconnect the X3 harness connector at the K59 starter/generator control module. Test for less than 2 ohms between the low reference circuit terminal B and ground. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K59 starter/generator control module. If less than 10 ohms
  3. Ignition ON.
  4. Test for 4.8-5.2 V between the signal circuit terminal A and ground. If less than 4.8 V Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit If less than 2 ohms, replace the K59 starter generator control module. If greater than 5.2 V Ignition OFF, disconnect the X3 harness connector at the K59 starter generator control module. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, test the signal circuit for a short to voltage. If less than 1 V, replace the K59 starter generator control module. If between 4.8-5.2 V
  5. Test or replace the B204A hybrid/EV battery pack coolant temperature sensor 1.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Auxiliary Radiator Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) - Hybrid/EV battery pack coolant temperature sensor 1 replacement
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for starter/generator control module replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Relay Switch B+11
Relay Coil Ignition11
Relay Coil ControlP0CC3P0CC1P0CC4
Relay Switch Control211
Component Ground1
1. Starter/generator control module coolant pump inoperative 2. Starter/generator control module coolant pump always on

The starter/generator control module coolant pump is a single speed ON/OFF pump that circulates coolant through the auxiliary radiator and the starter/generator to control the temperature of the starter/generator. The starter/generator cooling system is separate from the engine cooling system and does not share any coolant or components. The starter/generator control module coolant pump is controlled by the starter/generator coolant pump relay. The relay switch and coil both receive B+. The starter/generator control module controls the relay coil by applying ground to the coil control circuit. With the coil grounded, the relay switch is closed and voltage is sent to the starter/generator control module coolant pump, which will begin circulating coolant.

The starter/generator control module uses the exponentially weighted moving average to calculate temperature fluctuations in the starter/generator cooling system. In addition, this diagnostic compares the temperature rate of change by a slope calculation within a set time when the starter/generator control module coolant pump turns ON. This diagnostic runs once after pump turns ON. If the temperature changes over time too quickly, the starter/generator control module will indicate a fault.

P0CC1 or P0CC3

  1. Ignition is RUN or CRANK
  2. Starter/generator control module coolant pump control is inactive

P0CC2

  1. Ignition is RUN or CRANK
  2. 12 V battery voltage is greater than 10 V
  3. Starter/generator control module coolant pump control is active
  4. DTC P0A2B, P0A2B, P0A2C, P0CC1, P0CC3, P0CC4, P0CBD, P0CBE, or P0CBF is not set
  5. The predicted difference between the coolant temperature in the starter/generator and the coolant temperature as measured by the hybrid electronics coolant temperature sensor is greater than 17°C (31°F)

P0CC4

  1. Ignition is RUN or CRANK
  2. Starter/generator control module coolant pump control is active

P0CC1

An open is detected on the starter/generator coolant pump relay control circuit.

P0CC2

The coolant temperature is 0.25°C/s greater than the maximum cooling system performance temperature.

P0CC3

A short to ground is detected on the starter/generator coolant pump relay control circuit.

P0CC4

A short to voltage is detected on the starter/generator coolant pump relay control circuit.

DTCs P0CC1, P0CC2, P0CC3, and P0CC4 are type B DTCs

DTCs P0CC1, P0CC2, P0CC3, and P0CC4 are type B DTCs

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Verify the coolant level of the starter/generator cooling system is normal. If the coolant level is low Inspect the starter/generator cooling system for any leaks. If the coolant level is normal
  2. Verify the starter/generator cooling system auxiliary radiator is clear of any debris, bent fins, or other damage which may inhibit airflow. If debris are found Clean the auxiliary radiator. If damage is found Replace the auxiliary radiator. If the coolant level is normal
  3. Verify the starter/generator cooling system hoses are properly routed and are not kinked. If any hoses are improperly routed or kinked Removed and properly route the hose. If all hoses are routed properly and are not kinked
  4. Ignition ON.
  5. Verify the G22 starter/generator control module coolant pump turns ON and OFF when commanding the Motor Coolant Pump Relay Enable ON and OFF with a scan tool. The G22 starter/generator control module coolant pump will make an audible noise during operation. If the G22 starter/generator control module coolant pump does not turn ON and OFF Refer to «Circuit/System Testing»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) . If the G22 starter/generator control module coolant pump turns ON and OFF
  6. All OK.
WARNINGAlways perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Before working on any high voltage system, be sure to wear the following Personal Protection Equipment: Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors. Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. Visually and functionally inspect the gloves before use. Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures exactly as written may result in serious injury or death.
WARNINGThe eAssist battery pack assembly will utilize an exchange program. Please consult the most recent revision of bulletin/PI# PIC5520, available in Service Information (SI), for a list of approved eAssist battery pack assembly service procedures. Components that may be removed and serviced without exchanging the complete battery pack assembly are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
  1. Ignition OFF, disconnect the KR133 starter/generator coolant pump relay, ignition ON.
  2. Verify a test lamp illuminates between the B+ circuit terminal 87 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, Disconnect the harness connector at the G22 starter/generator control module coolant pump. Test for infinite resistance between the control circuit terminal 30 and ground. If less infinite resistance, repair the short to ground on the circuit. If infinite resistance, test or replace the G22 starter/generator control module coolant pump. If the test lamp illuminates
  3. Verify a test lamp illuminates between the ignition circuit terminal 86 and ground. If the test lamp does not illuminate Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If the test lamp illuminates
  4. Connect a test lamp between the ignition circuit terminal 86 and the control circuit terminal 85.
  5. Verify the test lamp turns ON and OFF when commanding the Motor Coolant Pump Relay Enable ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the X2 harness connector at the K59 starter/generator control module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K59 starter/generator control module. If the test lamp is always ON Ignition OFF, disconnect the X2 harness connector at the K59 starter/generator control module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K59 starter/generator control module. If the test lamp turns ON and OFF
  6. Verify a test lamp does not illuminate between the control circuit terminal 30 and ground. If the test lamp does not illuminate Repair the short to voltage on the circuit. If the test lamp does not illuminate
  7. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the G22 starter/generator control module coolant pump. It may take up to 2 minutes for all vehicle systems to power down.
  8. Test for less than 10 ohms between the G22 starter/generator control module coolant pump ground circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  9. Connect the harness connector at the G22 starter/generator control module coolant pump.
  10. Ignition ON, connect a 10 A fused jumper wire between the B+ circuit terminal 87 and the control circuit terminal 30.
  11. Verify the G22 starter/generator control module coolant pump is activated. The G22 starter/generator control module coolant pump will make an audible noise during operation. If the G22 starter/generator control module coolant pump does not activate Ignition OFF. Test for less than 2 ohms in the control circuit terminal 30 end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, test or replace the G22 starter/generator control module coolant pump. If the G22 starter/generator control module coolant pump activates
  12. Test or replace the KR133 starter/generator coolant pump relay.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Generator Control Module Coolant Pump Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system)
  2. «Control Module References»(/buick/regal/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for starter/generator control module replacement, programming, and setup

Scheme 209

Scheme 209: Coolant Recovery Reservoir Bracket Replacement
Scheme 209: Coolant Recovery Reservoir Bracket Replacement
CalloutComponent Name
Preliminary Procedure Remove the drive motor battery cool air separator. Refer to Drive Motor Battery Coolant/Air Separator Replacement .
1Coolant Recovery Reservoir Fastener(Qty: 1) CAUTION: Refer to Fastener Caution .
2Coolant Recovery Reservoir Bracket
CAUTION
Refer to Fastener Caution .

Coolant Recovery Reservoir Bracket Replacement

Scheme 210

Scheme 210: Auxiliary Radiator Replacement
Scheme 210: Auxiliary Radiator Replacement
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove front bumper fascia. Refer to Front Bumper Fascia Replacement Remove the auxiliary radiator inlet hose. Refer to Auxiliary Radiator Inlet Hose Replacement . Remove the auxiliary radiator outlet hose. Refer to Auxiliary Radiator Outlet Hose Replacement .
1Remove Auxiliary Radiator Fasteners(Qty: 2) CAUTION: Refer to Fastener Caution .
2Remove the Auxiliary Radiator.
CAUTION
Refer to Fastener Caution .

Auxiliary Radiator Replacement

Scheme 211

Scheme 211: Radiator Side Mount Bracket Replacement - Left Side
Scheme 211: Radiator Side Mount Bracket Replacement - Left Side
CalloutComponent Name
Preliminary Procedure Remove the auxilliary radiator. Refer to Auxiliary Radiator Replacement .
1Radiator Side Mount Bracket -Left Side Fastener(Qty: 1) CAUTION: Refer to Fastener Caution .
2Radiator Side Mount Bracket
CAUTION
Refer to Fastener Caution .

Radiator Side Mount Bracket Replacement - Left Side

Radiator Side Mount Bracket Replacement - Right Side

CalloutComponent Name
Preliminary Procedure Remove the auxilliary radiator. Refer to Auxiliary Radiator Replacement .
1Radiator Side Mount Bracket- Right Side Fastener(Qty: 1) CAUTION: Refer to Fastener Caution .
2Radiator Side Mount Bracket
CAUTION
Refer to Fastener Caution .

Radiator Side Mount Bracket Replacement - Right Side

Scheme 212

Scheme 212: Auxiliary Radiator Inlet Hose Replacement
Scheme 212: Auxiliary Radiator Inlet Hose Replacement
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement
1Auxiliary Radiator Inlet Hose clamps
2Auxiliary Radiator Inlet Hose

Auxiliary Radiator Inlet Hose Replacement

Scheme 213

Scheme 213: Auxiliary Radiator Outlet Hose Replacement
Scheme 213: Auxiliary Radiator Outlet Hose Replacement
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement
1Auxiliary Radiator outlet Hose clamps
2Auxiliary Radiator outlet Hose

Auxiliary Radiator Outlet Hose Replacement

Scheme 214

Scheme 214: Generator Control Module Cooling Air Inlet Duct Replacement
Scheme 214: Generator Control Module Cooling Air Inlet Duct Replacement
CalloutComponent Name
Preliminary Procedure Disable the hybrid battery. Refer to High Voltage Disabling . Remove the generator battery. Refer to Generator Battery Replacement . Remove the generator control module. Refer to Generator Control Module Replacement .
1Generator Control Module Cooling Air Inlet Duct Fasteners CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in).
2Generator Control Module Cooling Air Inlet Duct Seals NOTE: Replace seals if worn or damaged.
3Generator Control Module Cooling Air Inlet Duct
CAUTION
Refer to Fastener Caution .
NOTE
Replace seals if worn or damaged.

Generator Control Module Cooling Air Inlet Duct Replacement

Removal Procedure

  1. Disable the hybrid battery. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) .
  2. Remove the drive motor battery cooling blower outlet duct fasteners (1).
  3. Detach the drive motor cooling blower outlet duct. Refer to «Drive Motor Battery Cooling Blower Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) .
  4. Remove the generator control module cooling air outlet duct fasteners (1) and remove the generator control module cooling air outlet duct (2).

Installation Procedure

  1. Install the generator control module cooling air outlet duct (2) and tighten the fasteners (1) to 9 N.m (80 lb in).
  2. Install the drive motor battery cooling blower outlet duct (2) and tighten the fasteners (1) to 9 N.m (80 lb in).
  3. Enable the hybrid battery. Refer to «High Voltage Enabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-enabling) .

Scheme 215

Scheme 215: Generator Control Module Coolant Pump Hose Replacement
Scheme 215: Generator Control Module Coolant Pump Hose Replacement
CalloutComponent Name
Preliminary Procedures Remove intake manifold cover. Refer to. Intake Manifold Cover Replacement
1Hose clamps (Qty2)
2Heater coolant pump hose.

Generator Control Module Coolant Pump Hose Replacement

Scheme 216

Scheme 216: Generator Control Module Coolant Outlet Hose Replacement
Scheme 216: Generator Control Module Coolant Outlet Hose Replacement
CalloutComponent Name
Preliminary Procedures Remove intake Manifold cover. Refer to Intake Manifold Cover Replacement
1Clamps(Qty2)
2Generator Control module Coolant Outlet Hose

Generator Control Module Coolant Outlet Hose Replacement

Scheme 217

Scheme 217: Generator Control Module Coolant Pump Replacement
Scheme 217: Generator Control Module Coolant Pump Replacement
CalloutComponent Name
Preliminary Procedures Remove intake Manifold cover. Refer to Intake Manifold Cover Replacement Remove generator Control module coolant outlet hose.Refer to. Generator Control Module Coolant Outlet Hose Replacement
1Generator Control Module Coolant Pump Fasteners(Qty3) CAUTION: Refer to Fastener Caution .
2Generator Control Module Coolant Pump
CAUTION
Refer to Fastener Caution .

Generator Control Module Coolant Pump Replacement

Heater Coolant Pump Hose Replacement

CalloutComponent Name
Preliminary Procedures Remove intake manifold cover. Refer to. Intake Manifold Cover Replacement
1Hose clamps (Qty2)
2Heater coolant pump hose.

Heater Coolant Pump Hose Replacement

Scheme 218

Scheme 218: Heater Outlet Hose Clip Bracket Replacement
Scheme 218: Heater Outlet Hose Clip Bracket Replacement
CalloutComponent Name
Preliminary Procedure Remove heater coolant pump hose.Refer to. Heater Coolant Pump Hose Replacement Remove heater inlet hose. Refer to. Heater Inlet Hose Replacement (LHU) , Heater Inlet Hose Replacement (LEA) , Heater Inlet Hose Replacement (LUK)
1Heater Outlet Hose Clip Bracket Fastener
2Heater Outlet Hose Clip Bracket.

Heater Outlet Hose Clip Bracket Replacement

Scheme 219

Scheme 219: Drive Motor Battery Cooling Blower Replacement
Scheme 219: Drive Motor Battery Cooling Blower Replacement
CalloutComponent Name
Preliminary Procedures Drive motor battery cooling blower outlet.Refer to Drive Motor Battery Cooling Blower Outlet Duct Replacement
1Drive Motor Battery Cooling Blower Motor Fastener (Qty: 3) CAUTION: Refer to Fastener Caution .
2Drive Motor Battery Cooling Blower Motor
CAUTION
Refer to Fastener Caution .

Drive Motor Battery Cooling Blower Replacement

Scheme 220

Scheme 220: Drive Motor Generator Battery Bracket Replacement
Scheme 220: Drive Motor Generator Battery Bracket Replacement
CalloutComponent Name
Preliminary Procedures Drive motor battery cooling blower replacement t.Refer to Drive Motor Battery Cooling Blower Replacement
1Drive Motor Battery Cooling Blower Motor Bracket Fasteners (Qty: 3) CAUTION: Refer to Fastener Caution .
2Drive Motor Battery Cooling Blower Motor Bracket.
CAUTION
Refer to Fastener Caution .

Drive Motor Generator Battery Bracket Replacement

Scheme 221

Scheme 221: Drive Motor Battery Cooling Blower Outlet Duct Replacement
Scheme 221: Drive Motor Battery Cooling Blower Outlet Duct Replacement
CalloutComponent Name
Preliminary Procedure remove rear window panel storage compartment. Refer to. Rear Window Panel Stowage Compartment Cover Replacement (with HP6) Remove rear compartment side trim Refer to. Rear Compartment Side Trim Panel Replacement (without HP6) , Rear Compartment Side Trim Panel Replacement (HP6, Left Side) , Rear Compartment Side Trim Panel Replacement (HP6, Right Side) Remove Rear compartment floor panel. Refer to. Rear Compartment Floor Panel Trim Replacement (with Battery Cover, HP6) , Rear Compartment Floor Panel Trim Replacement (with Blower Cover, HP6)
1Drive Motor Battery Cooling blower outlet upper duct fasteners (Qty2)
2Drive Motor Battery Cooling blower outlet upper duct

Drive Motor Battery Cooling Blower Outlet Duct Replacement

Scheme 222

Scheme 222: Drive Motor Battery Cooling Air Outlet Duct Replacement
Scheme 222: Drive Motor Battery Cooling Air Outlet Duct Replacement
CalloutComponent Name
Preliminary Procedure Remove rear compartment floor panel trim.Refer to. Rear Compartment Floor Panel Trim Replacement (with Battery Cover, HP6) , Rear Compartment Floor Panel Trim Replacement (with Blower Cover, HP6) Remove rear compartment side trim. Refer to. Rear Compartment Side Trim Panel Replacement (without HP6) , Rear Compartment Side Trim Panel Replacement (HP6, Left Side) , Rear Compartment Side Trim Panel Replacement (HP6, Right Side)
1Driver Motor Battery Cooling Outlet Duct Fastener
2Driver Motor Battery Cooling Outlet Duct.

Drive Motor Battery Cooling Air Outlet Duct Replacement

Scheme 223

Scheme 223: Drive Motor Battery Cooling Air Inlet Upper Duct Replacement
Scheme 223: Drive Motor Battery Cooling Air Inlet Upper Duct Replacement
CalloutComponent Name
Preliminary Procedure remove rear window panel storage compartment. Refer to. Rear Window Panel Stowage Compartment Cover Replacement (with HP6) Remove rear compartment side trim Refer to. Rear Compartment Side Trim Panel Replacement (without HP6) , Rear Compartment Side Trim Panel Replacement (HP6, Left Side) , Rear Compartment Side Trim Panel Replacement (HP6, Right Side)
1Drive Motor Battery Cooling Air inlet upper duct fasteners (Qty3) CAUTION: Refer to Fastener Caution .
2Drive Motor Battery Cooling Air inlet upper duct
CAUTION
Refer to Fastener Caution .

Drive Motor Battery Cooling Air Inlet Upper Duct Replacement

Scheme 224

Scheme 224: Drive Motor Battery Coolant/Air Separator Replacement
Scheme 224: Drive Motor Battery Coolant/Air Separator Replacement
CalloutComponent Name
Preliminary Procedure Drain the coolant. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) Remove the surge tank outlet hose.Refer to Radiator Surge Tank Outlet Hose Replacement (LUK) , Radiator Surge Tank Outlet Hose Replacement (LEA) , Radiator Surge Tank Outlet Hose Replacement (LHU) Remove the generator control module coolant pump hose. Refer to. Generator Control Module Coolant Pump Hose Replacement Remove generator control module coolant outlet hose.Refer to Generator Control Module Coolant Outlet Hose Replacement
1Drive Motor Battery Coolant Air Separator Retainer.
2Drive Motor Battery Coolant Air Separator.

Drive Motor Battery Coolant/Air Separator Replacement

  1. Disable the hybrid battery. Refer to «High Voltage Disabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-disabling) .
  2. Remove the drive motor battery cooling air inlet upper duct retainers (1). Refer to «Drive Motor Battery Cooling Air Inlet Upper Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) .
  3. Detach the battery cooling air inlet ducts (1) by using a suitable pry tool on the outside.
  1. Attach the battery cooling air inlet ducts (1) into the slotted receivers.
  2. Install the drive motor battery cooling air inlet upper duct into the slots with the retainers (1). Refer to «Drive Motor Battery Cooling Air Inlet Upper Duct Replacement»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-cooling-system) .
  3. Enable the hybrid battery. Refer to «High Voltage Enabling»(/buick/regal/v-2009-2013/remont/body-electrical/#hybridev-energy-storage-system__high-voltage-enabling) .

Hybrid/EV Battery Pack Cooling

Within the hybrid/EV battery pack, the hybrid/EV battery section 1, hybrid/EV battery section 2, and starter/generator control module are air cooled. Air is drawn in by the hybrid/EV battery pack cooling fan from the vehicle's passenger compartment. This air travels through a series of ducts into the hybrid/EV battery pack. Once inside the hybrid/EV battery pack, the air travels through the hybrid/EV battery section 1 and hybrid/EV battery section 2. The internal battery cells of the hybrid/EV battery section 1 and hybrid/EV battery section 2 are arranged in a staggered manner that allows maximum cooling as air travels through the battery sections. The air is then drawn under the starter/generator control module. The underside of the starter/generator control module have a series of heat sinks that allowing cooling of the internal electronics and capacitors. Air exits the hybrid/EV battery pack through a duct and is drawn through the hybrid/EV battery pack cooling fan. From the fan, air is exhausted into the vehicle's rear compartment through a series of ducts.

The cooling needs of the hybrid/EV battery pack is determined through the use of a series of temperature sensors. Six temperature sensors are used to monitor the temperature of the hybrid/EV battery section 1 and hybrid/EV battery section 2 cell groups. The starter/generator control module commands the hybrid/EV battery pack cooling fan to provide more or less air as the battery temperature increases or decreases. A single temperature sensor is used to monitor the air temperature of the incoming cooling air.

The hybrid/EV battery pack cooling system contains the following serviceable components

  1. Hybrid/EV Battery Pack Case
  2. Hybrid/EV Battery Section 1
  3. Hybrid/EV Battery Section 2
  4. Battery Energy Control Module
  5. Starter/Generator Control Module
  6. Hybrid/EV Battery Pack Cooling Fan

Hybrid/EV Battery Pack

The hybrid/EV battery pack is integral to the hybrid/EV battery pack cooling system. Foam gaskets are adhered to the metal battery pack tray. This seals the underside of the starter/generator control module to ensure proper airflow under the control module for cooling purposes. The hybrid/EV battery pack case cover also provides a mounting surface for the hybrid/EV battery pack cooling fan and has openings where the plastic vents are allowed to pass into the hybrid/EV battery pack to direct air through components which require cooling.

Hybrid/EV Battery Section 1 and Hybrid/EV Battery Section 2

The hybrid battery sections are air cooled. Each battery case has an air inlet and an air outlet. Air is drawn through the battery case to cool the individual cells. Six temperature sensors are used to monitor the battery temperature. The battery temperature sensors are located in the battery sections. Two of the temperature sensors are located on the top of the battery section and the remaining four are located on the bottom of the section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group.

Battery Energy Control Module

The battery energy control module measures critical temperatures within the two battery sections and at the hybrid/EV battery section 1 air inlet. Six temperature sensors are used to monitor the battery temperature. The battery temperature sensors are located in the battery sections. Two of the temperature sensors are located on the top of the battery section and the remaining four are located on the bottom of the section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group. The battery energy control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The battery temperature sensor resistance changes with battery temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The air inlet temperature sensor operates in much the same way, except that it measures the temperature of the incoming air used to cool the hybrid/EV battery pack at the hybrid/EV battery section 1 air inlet. None of the temperature sensors or the temperature sensor harness is serviceable. They are all serviced as part of the battery sections.

Starter/Generator Control Module

The starter/generator control module uses temperature information from the battery energy control module to control the hybrid/EV battery pack cooling fan and increase or decrease the cooling capacity. As battery cell temperature increases, the start/generator control module will command the hybrid/EV battery pack cooling fan speed to increase, increasing the air flow through the hybrid/EV battery pack. The starter/generator control module may also command the fan on in low ambient temperatures to aid in the warming of the battery cells. If the ambient temperature of the air in the passenger compartment, where the cooling air is drawn from, is warmer than the battery cell temperatures, it may be used to help warm the cells more quickly. The starter/generator control module will used the air inlet temperature sensor to determine the temperature of the incoming air.

Hybrid/EV Battery Pack Cooling Fan

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery section 1, hybrid/EV battery section 2, and starter/generator control module. To operate, the cooling fan receives an enable signal from the starter/generator control module. The enable control is controlled by a discrete high side driver in the starter/generator control module. When the enable control circuit is high, the fan will be enabled. The fan speed is controlled by a pulsed high side driver in the starter/generator control module. The greater the duty cycle on the fan speed signal circuit, the higher the fan speed. Maximum fan speed is 3900 RPM. The hybrid/EV battery pack cooling fan provides a low-side drive, pulse-width modulated feedback signal to the starter/generator control module. During normal operation, this feedback signal provides fan speed information. The hybrid/EV battery pack cooling fan has limited self-diagnostic capability. If the fan determines there is an internal fault, it will provide this information on the feedback circuit.

Starter/Generator Cooling

The starter/generator is liquid cooling using a stand-alone cooling system that is separate from the engine's cooling system.

The starter/generator cooling system contains the following serviceable components

  1. Starter/Generator Control Module
  2. Starter/Generator Coolant Temperature Sensor
  3. Starter/Generator Coolant Pump

Starter/Generator Control Module

The starter/generator control module monitors the starter/generator coolant temperature sensor. When the coolant temperature indicates that starter/generator cooling is required, the starter/generator control module commands the starter/generator coolant pump on. The starter/generator control module provides ground to the starter/generator coolant pump relay coil through a dedicated low side driver. The will cause the starter/generator coolant pump relay switch to closed, providing B+ to the starter/generator coolant pump.

Starter/Generator Coolant Temperature Sensor

The starter/generator coolant temperature sensor is a variable resistor that measures the temperature of the starter/generator coolant. The starter/generator control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The starter/generator coolant temperature sensor resistance changes with starter/generator coolant temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases. The starter/generator control module monitors the starter/generator coolant temperature sensor to determine the temperature of the starter/generator coolant. As the coolant temperature changes, the starter/generator control module will turn the starter/generator coolant pump on or off to accommodate the starter/generator cooling requirements.

Starter/Generator Coolant Pump

The drive motor coolant pump is a single speed ON/OFF pump that circulates coolant through the starter/generator radiator and the starter/generator to control the temperature of the starter/generator.

Special Tools

Illustration Tool Number/ Description GE 47716 Vac-N-Fill Coolant Refill Tool EN 24460-A J 24460-A Cooling System Pressure Tester GE 26568 J 26568 Coolant and Battery Tester BO 38185 J 38185 Hose Clamp Pliers

Scheme 225

Scheme 225: Special Tools
Scheme 225: Special Tools

Scheme 226

Scheme 226
Scheme 226

Scheme 227

Scheme 227
Scheme 227

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