Battery, Charging System and Starting System Chevrolet Malibu VII

Fastener Tightening Specifications

Battery Usage

Generator Usage

Scheme 1

Scheme 2

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The following control modules monitor the battery voltage on the battery positive (B+) voltage circuit

1. Body control module (BCM)
2. Instrument panel cluster (IPC)
3. Passenger presence system (PPS)
4. Radio
5. Sensing and diagnostic module (SDM)
6. Theft deterrent module (TDM)

If any of the modules listed detects that the battery voltage is out of range, it will set DTC B1325.

Conditions for Running the DTC

1. The ignition is ON.
2. The battery voltage supplied to the control modules is in the range of 7-26 volts.

B1325 03

The control module detects that the system voltage is less than 9 volts for 5 seconds.

B1325 07

The control module detects that the system voltage is greater than 18 volts for 5 seconds.

Action Taken When the DTC Sets

The control module immediately disables all outputs when an out of range voltage condition has been detected, with the exception of GMLAN and the run/crank relay, which is disabled after a 3 minute delay.

Conditions for Clearing the DTC

The DTC passes when the malfunction is no longer present.

Diagnostic Aids

1. A high or low voltage value in multiple modules indicates a concern in the charging system.
2. Overcharging with a battery charger can cause this DTC to set.

Reference Information

Schematic Reference

1. «Body Control System Schematics»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#data-communication-system)
2. «Instrument Cluster Schematics»(/chevrolet/malibu/vii-2008-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
3. «SIR Schematics»(/chevrolet/malibu/vii-2008-2012/remont/airbag/#supplemental-inflatable-restraint-system)
4. «Radio/Navigation System Schematics»(/chevrolet/malibu/vii-2008-2012/remont/entertainment-systems/#cellular-systems-entertainment-systems-and-navigation-systems)
5. «Immobilizer Schematics»(/chevrolet/malibu/vii-2008-2012/remont/door-locks-anti-theft-systems/#immobilizer-system)

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Ignition OFF, disconnect the harness connectors at the appropriate module.
3. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the following ground circuit terminals and ground: Terminal 4 (TDM) Terminal 6 (IPC) Terminal 31 (SDM) Terminal 8 X1 (Radio) Terminal D X1 (PPS) Terminal 12 X1 (BCM) Terminal 13 X2 (BCM) Terminal E12 X4 (BCM) Terminal 9 X1 (BCM w/LAT/LE5/LY7) If greater than the specified range, test the ground circuit for an open/high resistance.
4. Verify that a test lamp illuminates between the following B+ circuit terminals and ground: Terminal 1 (SDM) Terminal 2 (TDM) Terminal 14 (IPC) Terminal 1 X1 (Radio) Terminal D12 X3 (BCM) If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. If the DTC is set in the PPS, verify that a test lamp illuminates between the ignition circuit terminal A X1 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
6. If all circuits test normal, replace the appropriate module.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the appropriate module replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) supplies 5 volts and ground to the battery current sensor. The battery current sensor measures the amount of current flowing to or from the battery, and supplies a pulse width modulation (PWM) signal to the BCM. The BCM monitors the battery current signal, and sets DTC B1516 08 if the signal is outside the normal range of 4-96 percent duty cycle. The BCM also monitors the current polarity, and sets DTC B1516 66 if reverse polarity is detected.

B1516 08

The BCM is awake.

B1516 66

1. The BCM is awake.
2. The engine is not running.
3. DTC B1516 08 has run and passed.
4. DTC B1516 66 has not run and passed.

The battery current signal is less than 4 percent or greater than 96 percent duty cycle for 2 minutes.

The battery current polarity is positive for 2 minutes.

The regulated voltage control (RVC) is disabled.

1. The DTC passes when the battery current signal returns to the normal range for 2 minutes.
2. A history DTC will clear after 100 ignition cycles.

DTC B151 66 may set if a battery charger is used.

Schematic Reference

1. «Starting and Charging Schematics»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Body Control System Schematics»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#data-communication-system)

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify that the current sensor is mounted correctly on the negative battery cables. The sensor should be installed with the coil around the negative battery cables, with the tape tab pointing away from the battery.
2. Ignition OFF, disconnect the battery current sensor.
3. Ignition OFF and scan tool disconnected, remove the 30A IBCM 1 fuse 20 from the underhood fuse block, and wait 45 seconds. Test for less than 5 ohms between the low reference circuit terminal B and ground. If greater than the specified value, test the current sensor low reference circuit and the BCM ground circuits for an open/high resistance. If the circuits test normal, replace the BCM.
4. Ignition ON, test for 4.5-5.5 volts on the 5-volt reference circuit terminal A. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.
5. Ignition ON, test for 4.5-5.5 volts on the signal circuit terminal C. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
6. If all circuits test normal, replace the battery current sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Battery Current Sensor Replacement»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Typical Scan Tool Data

Battery Voltage Signal - BCM

Batt. Voltage High Res. - BCM

The body control module (BCM) has 2 circuits for monitoring vehicle system voltage. The circuits are supplied by the IBCM 1 fuse and the BATT SENSE fuse. The BCM monitors the system voltage on the 2 B+ circuits to ensure that the voltage stays within the normal range. Damage to components, and incorrect data may occur when the voltage is out of range.

The BCM is awake.

Conditions for Setting the DTC

The voltage of the 2 BCM battery sense circuits differ by 1 V for 10 seconds.

Regulated voltage control (RVC) is disabled.

1. The DTC will pass when the malfunction is no longer present for 10 seconds.
2. A history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.

A high or low voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6-15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool BCM Battery Voltage Signal parameter and the Batt. Voltage High Res. parameter. The reading for both parameters should be between 12.6-15.0 volts, and should be within 1 volt of each other.

1. Verify that a test lamp illuminates between the B+ circuit fuses in the BCM listed below and ground. The Ign Sensor fuse The Interior Lights fuse The Door Lock fuse If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
2. Ignition OFF, disconnect the harness connectors at the BCM.
3. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 45 seconds. Test for less than 5 ohms between the ground circuit terminals listed below and ground. Terminal 9 X1 Terminal 12 X1 Terminal 13 X2 Terminal E12 X4 If greater than the specified range, test the ground circuit for an open/high resistance.
4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 11 X1 Terminal D12 X3 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of this diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Battery Voltage Signal - EBCM

The electronic brake control module (EBCM) monitors the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly. If the EBCM detects low battery voltage, DTC C0899 00 will set.

The ignition is ON.

The EBCM detects that the system voltage is less than 9 volts (HP7) or 9.2 volts (w/o HP7).

1. The antilock brake system (ABS) is disabled.
2. The vehicle stability enhancement system (VSES) is disabled, if equipped.
3. The dynamic rear proportioning (DRP), hydraulic brake assist (HBA), and traction control system (TCS) are disabled. (w/o HP7)
4. The DRP defaults to hold only. (HP7)
5. The TCS is reduced to engine torque reduction only. (HP7)
6. The ABS, BRAKE, and VDC indicators turn ON.
7. The driver information center (DIC) displays the ESC OFF message 1 time, if equipped.
8. The DIC displays the SERVICE ESC message, if equipped.
9. The DIC displays the SERVICE TRACTION message.

1. The condition for setting the DTC is no longer present.
2. The EBCM automatically clears a history DTC when a current DTC is not detected in 100 consecutive drive cycles.

A low voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

Antilock Brake System Schematics (without HP7) or Antilock Brake System Schematics (HP7)

Connector End View Reference

Component Connector End Views

Description and Operation

1. «ABS Description and Operation (with LAT)»(/chevrolet/malibu/vii-2008-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system__abs-description-and-operation-with-lat) or «ABS Description and Operation (without LAT)»(/chevrolet/malibu/vii-2008-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system__abs-description-and-operation-without-lat)
2. «Charging System Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts.

1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 45 seconds. Test for less than 5 ohms between the ground circuit terminals listed below and ground. Terminal 16 (w/o HP7) Terminal 45 (w/o HP7) Terminal E (HP7) Terminal F (HP7) If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 2 (w/o HP7) Terminal 31 (w/o HP7) Terminal A (HP7) Terminal B (HP7) If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the EBCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Battery Voltage Signal - PSCM

The power steering control module (PSCM) monitors the amount of battery voltage available to it. If the voltage is too high, then the PSCM sets DTC C0900 00 and disables itself in order to protect itself against high voltage damage.

The ignition is ON.

Power steering system voltage is greater than 16 volts for 1 second.

1. The PSCM is disabled.
2. No steering assist is provided.
3. The driver information center (DIC) displays the POWER STEERING message.

1. A current DTC will clear when the power steering system voltage returns to less than 16 volts.
2. A history DTC will clear after 100 consecutive ignition cycles from when power steering system voltage is less than 16 volts.

1. A possible cause of this DTC could be overcharging with a battery charger or jump starting.
2. A high voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

Power Steering Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) or Power Steering System Description and Operation (EPS)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool PSCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts. If not within the specified range, replace the PSCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PSCM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Battery Voltage Signal - EBCM

The electronic brake control module (EBCM) monitors the ignition voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected the EBCM turns OFF the system relay which removes battery voltage from the solenoid valves and pump motor.

The ignition is ON.

The EBCM detects that the battery voltage is greater than 16 volts (w/o HP7) or 17 volts (HP7).

1. The antilock brake system (ABS) is disabled. (HP7)
2. The dynamic rear proportioning (DRP) defaults to hold only. (HP7)
3. The ABS and DRP are disabled, if the battery voltage is greater than 19.5 volts. (w/o HP7)
4. The vehicle stability enhancement system (VSES) is disabled, if equipped.
5. The hydraulic brake assist (HBA) and traction control system (TCS) are disabled. (w/o HP7)
6. The TCS is reduced to engine torque reduction only. (HP7)
7. The ABS indicator turns ON. (HP7)
8. The ABS indicator turns ON, if the battery voltage is greater than 19.5 volts. (w/o HP7)
9. The BRAKE and VDC indicators turn ON.
10. The driver information center (DIC) displays the ESC OFF message 1 time, if equipped.
11. The DIC displays the SERVICE ESC message, if equipped.
12. The DIC displays the SERVICE TRACTION message.

1. The condition for the DTC is no longer present.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
3. The indicators and DIC messages turn OFF when the DTC passes.

1. A possible cause of this DTC could be overcharging with a battery charger or jump starting.
2. A high voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

Antilock Brake System Schematics (without HP7) or Antilock Brake System Schematics (HP7)

Connector End View Reference

Component Connector End Views

Description and Operation

1. «ABS Description and Operation (with LAT)»(/chevrolet/malibu/vii-2008-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system__abs-description-and-operation-with-lat) or «ABS Description and Operation (without LAT)»(/chevrolet/malibu/vii-2008-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system__abs-description-and-operation-without-lat)
2. «Charging System Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.60 and 15.00 volts. If not within the specified range, replace the EBCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Ignition 1 Signal - ECM

The engine control module (ECM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur if the voltage is out of range. If the ECM detects that the system voltage is too low, then DTC P0562 sets.

The engine is running.

The ECM detects that the system voltage is less than 9 volts for 5 seconds.

DTC P0562 is a type C DTC.

DTC P0562 is a type C DTC.

A low voltage DTC in multiple modules indicates a concern in the charging system.

Schematic Reference

1. «Engine Controls Schematics (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-24l-wiring-schematics) or «Engine Controls Schematics (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-24l-wiring-schematics) for the 2.4L (LAT/LE5) engines
2. «Engine Controls Schematics»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-35l-wiring-schematic-diagrams) for the 3.5L (LZ4) engine
3. «Engine Controls Schematics»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-wiring-schematic-diagrams) for the 3.6L (LY7) engine

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool ECM Ignition 1 Signal parameter. The reading should be between 12.6 and 15.0 volts.

1. Ignition OFF, disconnect the harness connectors at the ECM.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the appropriate ground circuit terminal listed below and ground. Terminal 73 X1 (LZ4) Terminal 73 X2 (LAT, LE5, LY7) If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal 20 X1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Install a 3A jumper wire between the appropriate PWR/TRN relay control circuit terminal listed below and ground. Terminal 13 X1 (LE5) Terminal 40 X1 (LAT, LY7) Terminal 59 X1 (LZ4)
5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminals listed below and ground. Terminal 3 X1 (LE5) Terminal 18 X1 (LAT, LY7, LZ4) Terminal 19 X1 (all engines) Terminal 47 X1 (LZ4) Terminal 73 X1 (LE5) Terminal 13 X2 (LAT, LY7)
6. If all circuits test normal, replace the ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Ignition 1 Signal - ECM

The engine control module (ECM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range. If the ECM detects that the system voltage is high, DTC P0563 sets.

1. The engine is running.
2. The vehicle speed is greater than 8 km/h (5 mph).
3. The system voltage is between 9.5-18 volts.

The ECM detects that the system voltage is greater than 16 volts for 1 second.

1. The charge indicator turns ON.
2. The ECM will not illuminate the malfunction indicator lamp (MIL).
3. The ECM will store conditions, which were present when the DTC set as Fail Records data only.

1. The ECM will command the indicator OFF after one trip in which the diagnostic test has been run and passed.
2. A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

1. A high voltage DTC in multiple modules indicates a concern in the charging system.
2. This DTC could be set by overcharging with a battery charger or jump starting.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts. If not within the specified range, refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Observe the scan tool ECM Ignition 1 Signal parameter. The reading should be between 12.60 and 15.00 volts. If all circuits test normal, replace the ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Starter Relay Ckt Short Gnd Test Status - ECM

Starter Relay Ckt Open Test Status - ECM

Starter Relay Ckt Short Volts Test Status - ECM

When the ignition switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the START position. The BCM then sends a serial data message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the transmission is in Park or Neutral. If it is, the ECM then supplies 12 V to the control circuit of the CRNK relay. When this occurs, battery voltage is supplied through the switch of the CRNK relay to terminal A X2 of the starter solenoid. The ECM monitors the voltage on the starter relay control circuit. If the voltage is not what is expected, then DTC P0615 sets.

1. The ignition is in the START position.
2. The system voltage is between 9.5-18 V.

The ECM detects improper voltage on the control circuit of the CRNK relay.

DTC P0615 is a type C DTC.

DTC P0615 is a type C DTC.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Starting System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Attempt to start the engine while observing the following ECM scan tool control circuit status parameters.

1. Starter Relay Ckt Short Gnd Test Status
2. Starter Relay Ckt Open Test Status
3. Starter Relay Ckt Short Volts Test Status

Each parameter should toggle between OK and Not Run or Not Run and OK.

1. Ignition OFF, disconnect the CRNK relay.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 85 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
4. Transmission in park, turn the ignition switch between the OFF and START positions. The test lamp should turn ON and OFF when changing between the positions. If the test lamp is always ON, test the control circuit for short to voltage. If the circuit tests normal, replace the ECM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
5. If all circuits test normal, test or replace the CRNK relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the CRNK relay.
2. Test for 60-180 ohms between terminals 85 and 86. If not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 86 30 and 87 30 and 85 85 and 87 If not the specified value, replace the relay.
4. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

GEN L-Terminal Ckt Short Gnd Test Status - ECM

GEN L-Terminal Ckt Open Test Status - ECM

GEN L-Terminal Ckt Short Volts Test Status - ECM

The engine control module (ECM) uses the generator turn on control circuit, or L-terminal circuit, to control the load of the generator on the engine. A high side driver in the ECM applies a voltage to the voltage regulator.

The engine is running.

The ECM detects high or low voltage on the generator turn on control circuit for 15 seconds.

The charge indicator turns ON.

1. The DTC will pass when the conditions for setting the DTC are no longer met for 1 second.
2. A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, observe the following scan tool ECM control circuit status parameters.

1. GEN L-Terminal Ckt Short Gnd Test Status
2. GEN L-Terminal Ckt Open Test Status
3. GEN L-Terminal Ckt Short Volts Test Status

Each parameter should read OK or Not Run.

LY7 Engine

1. Verify that a test lamp illuminates between the G13 generator B+ terminal + X2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
2. Ignition OFF, disconnect the harness connector at the generator.
3. Ignition ON, test for less than 1 V between the control circuit terminal 1 and ground. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
4. Engine running, test for greater than 3.5 V between the control circuit terminal 1 and ground. If less than the specified range, test the control circuit for a short to ground, an open or a high resistance. If the circuit tests normal, replace the K20 ECM.
5. If the circuit tests normal, test or replace the G13 generator.

LE5, LZ4 or LZ9 Engine

1. Verify that a test lamp illuminates between the G13 generator B+ terminal + X2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
2. Ignition OFF, disconnect the harness connector at the generator.
3. Ignition ON, test for 4.5-5.5 V between the control circuit terminals listed below and ground: Terminal 1 (LE5) Terminal B (LZ4, LZ9) If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM. If less than the specified range, test the control circuit for a short to ground, an open or a high resistance. If the circuit tests normal, replace the K20 ECM.
4. If the circuit tests normal, test or replace the G13 generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

GEN F-Terminal Signal - ECM

The engine control module (ECM) uses the generator field duty cycle signal circuit, or F-terminal circuit, to monitor the duty cycle of the generator. The generator field duty cycle signal circuit connects to high side of the field windings in the generator. A pulse width modulated (PWM) high side driver in the voltage regulator turns the field windings ON and OFF. The ECM uses the PWM signal input to determine the generator load on the engine. This allows the ECM to adjust the idle speed to compensate for high electrical loads. The ECM monitors the status of the generator field duty cycle signal circuit. When the key is in the RUN position and the engine is OFF, the ECM should detect a duty cycle near 0 percent. However, when the engine is running, the duty cycle should be between 5-99 percent.

1. The engine is running.
2. The system voltage is between 9.5-18 V.

The ECM detects that the generator field duty cycle signal is less than 5 percent for 30 seconds.

The charge indicator turns ON.

1. The DTC will pass when the generator field duty cycle signal is greater than 5 percent for 1 second.
2. The charge indicator will turn OFF when the DTC passes or is cleared with a scan tool.
3. A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, engine OFF, observe the scan tool ECM GEN-F Terminal Signal parameter. The reading should be less than 5%.
2. Engine running, observe the scan tool ECM GEN-F Terminal Signal parameter. The reading should be greater than 5%.

1. Verify that a test lamp illuminates between the B+ circuit terminal X2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
2. Ignition OFF, disconnect the X1 harness connector at the generator.
3. Ignition ON, verify the scan tool ECM GEN-F Terminal Signal is less than 5%. If greater than the specified range, test the signal circuit terminal 2 or C X1 for a short to voltage. If the circuit tests normal, replace the ECM.
4. Install a 3 A fused jumper wire between the signal circuit terminal 2 or C X1 and B+. Verify the scan tool ECM GEN-F Terminal Signal is greater than 95%. If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
5. If all circuits test normal, test or replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine control module (ECM) uses the generator turn on signal circuit, or L-terminal circuit, to control the load of the generator on the engine. A high side driver in the ECM applies a voltage to the voltage regulator. This signals the voltage regulator to turn the field circuit ON and OFF. The ECM monitors the state of the generator turn ON signal circuit. The ECM should detect low voltage on generator turn on signal circuit when the ignition is ON and the engine is OFF, or when the charging system malfunctions. With the engine running, the ECM should detect high voltage on the generator turn on signal circuit. The ECM performs tests to determine the status of the generator turn on signal circuit.

The engine is running.

1. During the Key ON test the ECM detects high voltage on the generator turn on signal circuit for 5 seconds.
2. With the engine running the ECM detects low voltage on the generator turn on signal circuit for 15 seconds.

1. The ECM will command the charge indicator to be illuminated on the instrument panel cluster (IPC).
2. The ECM will not illuminate the malfunction indicator lamp (MIL).
3. The ECM will store conditions, which were present when the DTC set as Fail Records data only.

The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

1. Ignition OFF, disconnect the harness connector at the generator.
2. Ignition ON, test for less than 1 volt between the generator turn on signal circuit terminal 1 and ground. If greater than the specified range, test the generator turn on signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
3. Engine running, test for greater than 3.5 volts between the generator turn on signal circuit and ground. If less than the specified range, test the generator turn on signal circuit for a short to ground, an open or a high resistance. If the circuit tests normal, replace the ECM.
4. If the circuit tests normal, replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Symptoms - Engine Electrical

The following steps must be completed before using the symptom diagnostic procedures

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the symptom diagnostic procedures in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system descriptions and operations in order to familiarize yourself with the system functions. Refer to one of the following system operations: «Battery Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) «Charging System Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) «Electrical Power Management Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) «Starting System Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Refer to «Checking Aftermarket Accessories»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Battery Inspection/Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Battery Electrical Drain/Parasitic Load Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
3. «Battery Common Causes of Malfunction»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__battery-common-causes-of-malfunction)
4. «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
5. «Generator Noise Diagnosis»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
6. «Starter Solenoid Does Not Click»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
7. «Starter Solenoid Clicks, Engine Does Not Crank»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
8. «Engine Cranks Slowly»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__engine-cranks-slowly)
9. «Starter Noise Diagnosis»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Special Tools

J 42000 Battery Tester. See Special Tools .

Note. A dead battery is usually a symptom of another problem. Repair the problem. Do not just charge or replace the battery. Failure to properly understand the battery and its function could lead to a misdiagnosis and unneeded repairs. Refer to Battery Description and Operation and Battery Common Causes of Malfunction for more information.

Follow these instructions in order to avoid an incorrect diagnosis because of connections

1. If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal. See «Special Tools»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) . This may cut through any coating or through any oxidation that may be present on the terminal.
2. If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable.
3. If the tester displays a "Bad Battery" result for a battery tested in the vehicle with the battery cables connected, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Replace the battery only if the Out-of-Vehicle test shows a "Bad Battery" result. This prevents battery replacements that are due only to faulty battery cable connections.

1. Inspect the battery for a cracked, broken, or damaged case, which may be indicated by battery acid leakage. If there is any apparent damage, replace the battery.
2. Verify the cold cranking amperage (CCA), and reserve capacity (RC) and/or amp hour (AH) rating of the battery to the original battery or original equipment (OE) specification. Refer to «Battery Usage»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__battery-usage) . If the battery does not meet or exceed specifications, replace the battery.
3. Verify that the battery cables are clean and tight. The battery terminal bolts should be torqued as specified in «Fastener Tightening Specifications»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__fastener-tightening-specifications) . If the battery cable(s) need to be cleaned, clean as required and tighten as specified. If the battery cable(s) are damaged, replace then tighten as specified.
4. Install the J 42000 and follow directions supplied by the tester. See «Special Tools»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) . If the tester calls for charging the battery, refer to «Battery Charging»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Battery Positive Cable Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Battery Negative Cable Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
3. «Battery Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (without LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

J 42000 Battery Tester. See Special Tools .

1. For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
2. The charging area should be well ventilated.
3. Do not charge a battery that appears to be frozen. Allow the battery to warm to room temperature and test it using the J 42000 before charging. See «Special Tools»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Battery State of Charge

Note. Using voltage to determine the batteries state of charge (SOC) is only accurate after the battery has been at rest for 24 hours. This is enough time for the acid in each cell to equalize. If the battery has been charged or discharged in the past 24 hours, the battery SOC will only be an estimate.

The maintenance-free batteries SOC is estimated by reading the voltage of the battery across the battery terminals. Because the voltage is affected by current flow into or out of the battery, the engine must be stopped and all electrical loads turned OFF, including parasitic loads, when checking the voltage. The voltage can also be affected if the battery has just been charged or discharged, so it is important to consider what has happened to the battery in the time just before testing. Use the following procedure to determine the batteries SOC

1. Be sure all electrical loads are turned OFF.
2. Determine whether the battery has been used in a vehicle or charged within the past 12 hours. If the answer is no, the terminal voltage will be stabilized and no action is necessary before reading the voltage. Skip to step 3. If the answer is yes, terminal voltage will not be stabilized and you should wait 12 hours since the last time the battery was used.
3. Estimate the battery temperature by determining the average temperature to which the battery has been exposed for the past 12 hours.
4. Measure the battery voltage at the battery terminals. Refer to the following table to determine the SOC according to the estimated battery temperature

Use the SOC information as follows

1. A battery with a SOC that is below 65 percent must always be recharged before returning it to service or continuing storage.
2. A battery with a SOC that is 65 percent or greater is generally considered to be charged enough in order to be returned to normal service or in order to continue storage. However, if the battery is being used in slow traffic or with short drive times, or if the temperature is very hot or very cold, the battery should be fully charged, to at least 90 percent, before returning it to service or continuing storage.

Charging Time Required

The time required to charge a battery will vary depending upon the following factors

1. The battery charger capacity-The higher the charger amperage, the less time it will take to charge the battery.
2. The SOC of the battery-A completely discharged battery requires more than twice as much charging time as a half charged battery. In a discharged battery with a voltage below 11 volts, the battery has a very high internal resistance and may only accept a very low current at first. Later, as the charging current causes the acid content to increase in the electrolyte, the charging current will increase. Extremely discharged batteries may not activate the reversed voltage protection in some chargers. Refer to the manufacturer's instructions for operating this circuitry.
3. The temperature of the battery-The colder the battery is, the more time it takes to recharge the battery. The charging current accepted by a cold battery is very low at first. As the battery warms, the charging current will increase.

Charging Procedure

When charging side-terminal batteries with the battery cables connected, connect the charger to the positive cable bolt and to a ground located away from the battery. When charging side-terminal batteries with the battery cables disconnected, install the battery side terminal adapters and connect the charger to the adapters. Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

Use the following procedure to charge the battery

1. Turn OFF the charger.
2. Ensure that all of the battery terminal connections are clean and tight.
3. Connect the charger positive lead to the battery positive terminal on the battery or the remote jumper stud underhood.
4. Connect the negative charger lead to a solid engine ground or to a ground stud in the engine compartment that is connected directly to the battery negative terminal, but away from the battery. If the negative battery cable is disconnected and a terminal adapter is being used, connect directly to the adapter.
5. Turn ON the charger and set to the highest setting for normal charging.
6. Inspect the battery every half hour after starting the battery charger. Charge the battery until the taper-rate charger indicates that the battery is fully charged. Estimate the battery temperature by feeling the side of the battery. If it feels hot to the touch or its temperature is over 45°C (125°F), discontinue charging and allow the battery to cool before resuming charging.
7. After charging, test the battery. Refer to «Battery Inspection/Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

12 V Battery

The following procedure is for the 12 V battery only.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Components most likely to cause a parasitic draw on the vehicle's battery are switches, relays, and control modules. After the ignition is turned OFF the control modules will begin to go to sleep (shut OFF). All control modules do not go to sleep at the same time, some may take up to 30 minutes or longer after turning the ignition off before going to sleep, like the HVAC and body control modules. Others such as the ON Star and keyless entry control modules may periodically wake up then go back to sleep. These are all normal conditions.

1. Rule out any possible aftermarket equipment causing an unacceptable parasitic current drain. Aftermarket accessories installed into the courtesy lamp circuit can cause the inadvertent power timer in the body control module (BCM) to keep resetting. This would cause the BCM to remain awake and cause a current drain on the battery.
2. Rule out customer driving habits such as regular short trips that do not allow enough time to properly charge the battery. Refer to «Battery Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Verify that the battery and charging system are in proper working order. Refer to «Battery Charging»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) and «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
4. A battery discharging for no apparent reason while the vehicle is parked can be caused by an intermittent draw, such as a module waking up, or a continuous draw, such as a dome light or stuck relay.
5. Some systems and modules such as OnStar®, and regulated voltage control (RVC), if equipped, are designed to wake-up, perform a task, and go back asleep at regular intervals. Refer to «Body Control System Description and Operation»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#data-communication-system__body-control-system-description-and-operation) for the system or modules description and operation.
6. An engine off natural vacuum evaporative test can occur if the engine control module (ECM) determines the drive cycle has met the appropriate criteria immediately after key off. The ECM will stay awake and the vent solenoid will stay energized for as long as 45 minutes. The typical current draw for this is about 1 A.
7. Digital OnStar gen 6 and later VCIMs do not "wake up" every 10 minutes for the first 48 hours as the gen 5 and prior. Gen 6 and later VCIM current draw is very low, less than 40 mA, so the OnStar system is left in that state for up to the first 48 hours. Parasitic draw of up to 40 mA with an occasional spike as high as 80 mA through the VCIM for the first 48 hours is normal.
8. Some automatic climate control systems can remain in a semi-awake state for up to three hours, actual draw amounts vary by vehicle platform but are typically not greater than 50 mA.
9. An extremely low mA current level is consumed by the RKE receiver for monitoring purposes, actual system wake up only occurs when the fobs for the vehicle are used. When other devices on the same RKE operating frequency are activated, such as the 4 tire pressure monitoring sensors and other vehicle FOB's in the vicinity, the RKE receiver will have a 100 mA spike. These spikes are normal and occur too briefly to have a significant effect on battery drain. Competing signals may cause RKE performance issues such as jamming but should not cause excessive battery draw.
10. If an excessive current draw is not present during initial testing, continue periodic testing over a 1-2 hour period to see if the current draw increases and stays above an unacceptable level.
11. The battery run down time will vary depending on the batteries reserve capacity. If the reserve capacity is higher, then the battery run down time would be longer. If the reserve capacity is lower, then the battery run down time would be shorter. The graph below indicates roughly how many days a 690 cold cranking amp battery with a 110 min. reserve capacity starting at 80 percent state of charge will last with a constant current draw until it reaches 50 percent state of charge. Differences in battery reserve capacity and temperature will affect the results.

Schematic Reference

Control Module References

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
3. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL 38758: Parasitic Draw Test Switch

For equivalent regional tools, refer to Special Tools .

Note. Most vehicle systems will go to sleep within 30 minutes but it can take up to 2 hours before all systems power down allowing the parasitic draw test to pass. An occasional increase in the parasitic draw is normal as long as it returns within 1 second. Closing the door latches/ajar switch while leaving the doors open is recommended, this allows the vehicle systems to perform in a "doors closed" mode while allowing vehicle interior access that may be needed to complete the diagnostic steps. Locking doors will arm the vehicle content theft deterrent system if equipped. Failure to arm the system may cause a theft system fault to not be present during testing. There are many things that can prevent the vehicle from completely going to sleep and passing the parasitic draw test. Make sure all the conditions listed below are met before performing the parasitic current draw test. Ignition OFF Key out of the ignition switch - when not equipped with keyless access and start Retained Accessory Power RAP OFF - open and close the driver door after ignition OFF Scan tool not communicating with a vehicle control module - in some cases it may need to be disconnected from the DLC All access doors closed Headlamps OFF - auto headlamps disabled Any delay lighting OFF If equipped with an under hood lamp disable it HVAC after blow OFF Any accessory that can work with ignition OFF inactive or OFF Wait up to 2 minutes or longer, after all other listed conditions are met

Using an Inductive Pickup Probe

1. Connect an inductive pickup probe to the negative battery cable that can read down to 1 mA.
2. Ignition OFF, as the vehicle systems shut down test for less than 30 mA of parasitic current drain. If greater than the specified range, refer to «Circuit/System Testing»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Using the EL 38758 Parasitic Draw Test Switch

1. Ignition OFF, disconnect the battery negative cable from the battery. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Turn the EL 38758: switch knob to the OFF position.
3. Install the male end of the EL 38758: switch to the battery ground terminal.
4. Install the battery negative cable to the female end of the EL 38758: switch.
5. Turn the EL 38758: switch knob to the ON position.
6. Road test the vehicle and activate all of the accessories such as the radio and air conditioning.
7. Ignition OFF, connect a 10 A fused jumper wire to the test switch tool terminals.
8. Turn the EL 38758: switch knob to the OFF position. The current now flows through the jumper wire.
9. Check the fuse in the jumper wire. The fuse should be OK. If the jumper wire fuse is blown, refer to «Circuit/System Testing»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
10. Turn the EL 38758: switch knob to the ON position. Remove the fused jumper wire.
11. Connect a DMM set to the 10 A DC scale between the test switch tool terminals.
12. Turn the EL 38758: switch knob to the OFF position. The current now flows through the DMM.
13. As the vehicle systems shut down test for less than 30 mA of parasitic current drain. If greater than the specified range, refer to Circuit/System Testing below.

Note. Removing or installing a fuse, relay, or connector, to determine the area causing high parasitic draw may wake up control modules. You must wait for the control modules to go back to sleep before retesting. It is best to install any removed or disconnected components after the diagnosis is completed. Fuses for power mode master components such as the BCM should be removed last to avoid misdiagnosis. If a scan tool is connected to the DLC, either disconnect it or subtract the scan tool current draw from the DMM reading to get the actual vehicle parasitic current draw.

If the vehicle has an unacceptable amount of parasitic current draw, remove each fuse one at a time until the current draw falls to an acceptable level. A drop of more than 10-20 mA, when disabling a single system or circuit, is an indication of an overly high current draw that could be causing the battery drain. Refer to Power Distribution Schematics to diagnose exactly which circuit of the suspect system is causing the high parasitic drain. The follow is a list of common components that could cause a high current draw

1. Stuck switch
2. Stuck relay
3. Control module

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control module replacement, programming and setup

Battery Common Causes of Malfunction

A battery is not designed to last forever. With proper care, however, the battery will provide years of good service. If the battery tests good but still fails to perform well, the following are some of the more common causes

1. A vehicle accessory was left on overnight.
2. The driving speeds have been slow with frequent stops, stop-and-go driving, with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
3. The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
4. Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
5. The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
6. There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to «General Electrical Diagnosis»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures) .

Electrolyte Freezing

The freezing point of electrolyte depends on its specific gravity. A fully charged battery will not freeze until the ambient temperature gets below -54°C (-65°F). However, a battery with a low state of charge may freeze at temperatures as high as -7°C (20°F). Since freezing may ruin a battery, the battery should be protected against freezing by keeping it properly charged above 80 percent state of charge, the freezing point of the battery will be somewhere below -32°C (-25°F).

Battery Protection During Vehicle Storage

Certain devices on the vehicle maintain a small continuous current drain, parasitic load, on the battery. A battery that is not used for an extended period of time will discharge. Eventually permanent damage will result. Discharged batteries will also freeze in cold weather. Refer to Battery Inspection/Test .

In order to maintain the battery state of charge while storing the vehicle for more than 30 days

Disconnect the battery ground cable to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

1. Maintain a high state of charge.
2. Establish a regular schedule for recharging the battery every 20-45 days.

A battery that has remained in a discharged state for a long period of time is difficult to recharge or may be permanently damaged.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Engine running, observe the charge indicator on the instrument panel cluster (IPC) or message in the driver information center (DIC). The charge indicator on the IPC should be turned OFF and the DIC should not display any charging system message.

1. Ignition ON, verify that no generator or battery current sensor DTCs are set that would cause a charging system concern. If DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
2. Ignition OFF, measure the voltage across the battery terminals. The voltage should read 12.0 volts or greater at room temperature. If not within the specified value, refer to «Battery Inspection/Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Connect a carbon pile tester to the battery.
4. Start the engine and increase the engine speed to 2,500 RPM. Observe the voltage reading on the tester. The voltage should read between 12.6-15.0 volts. If not within specified range, replace the generator.
5. Adjust the carbon pile tester to the specified load test output value, refer to «Generator Usage»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__generator-usage) . If not within specified value, replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Generator Replacement (LY7) or Generator Replacement (LE5) or Generator Replacement (LZ4)

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Noise from a generator may be due to electrical or mechanical noise. Electrical noise or magnetic whine usually varies with the electrical load placed on the generator and is a normal operating characteristic of all generators. When diagnosing a noisy generator, it is important to remember that loose or misaligned components around the generator may transmit the noise into the passenger compartment and that replacing the generator may not solve the problem.

1. Start the engine. Verify the noise can be heard. Compare the concern to a similar vehicle.
2. Perform a charging system test. Verify that the generator is charging properly. Refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Inspect the generator, generator mounting, wiring harness, heater hoses, A/C lines, or other accessory equipment that may be misrouted or be the cause of noise being transmitted into the passenger compartment.
4. Ignition OFF, remove the engine drive belt. Verify the generator, A/C compressor, water pump pulley (LYZ/LZ4), power steering pump (if equipped), idler pulley (except LE5), and tensioner pulley spin freely. If any of the pulleys do not spin freely, replace the affected component.
5. Start the engine, with the drive belt removed. Verify that the noise goes away. Operate the engine for no longer than 30-40 seconds (LYZ/LZ4). If the noise is still present, the generator is not the cause of the noise.
6. Loosen all generator mounting bolts and ensure the generator is properly aligned. Tighten the mounting bolts to specification, refer to «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Drive Belt Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) or «Drive Belt Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) 2.4L (LAT/LE5)
2. «Drive Belt Tensioner Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) or «Drive Belt Tensioner Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) 2.4L (LAT/LE5)
3. «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) 3.5L (LZ4)
4. «Drive Belt Tensioner Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) 3.5L (LZ4)
5. «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) 3.6L (LY7)
6. «Drive Belt Tensioner Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) 3.6L (LY7)
7. «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Ignition 1 Signal - ECM

PNP Switch - ECM

The engine control module (ECM) controls engine cranking based on a power mode input and the status of the park/neutral position (PNP) switch. With the transmission in Park/Neutral, voltage at the ECM PNP switch signal circuit is low. This indicates to the ECM that conditions are acceptable for cranking. When a power mode crank request is seen, the ECM applies voltage to the starter relay coil control circuit. This energizes the coil side of the relay, which pulls the switch side of the relay closed, applying voltage to the starter terminal A X1 and engaging the starter solenoid.

1. Inspect the ECM IGN fuse and the STRTR fuse for an open.
2. A misadjusted PNP switch (MN5) or shift control/range selector lever cable may result in a starter solenoid does not click condition.
3. Verify that grounds G107 and G109 are clean and tight.

Schematic Reference

1. «Starting and Charging Schematics»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Engine Controls Schematics»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-wiring-schematic-diagrams)

Connector End View Reference

Component Connector End Views

Description and Operation

Starting System Description and Operation

Electrical Information Reference

1. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
2. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
3. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify that no starter relay, immobilizer, or automatic transmission DTCs are set that would cause the ECM to disable starting. If the specified DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
2. Ignition ON, observe the scan tool ECM Ignition 1 Signal parameter with a scan tool. The reading should be greater than 10.0 Volts. If less than the specified value, test the ECM IGN fuse, the RUN/CRNK relay, and the ignition voltage circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, transmission in Park, observe the scan tool ECM PNP Switch parameter with a scan tool. The reading should be Park/Neutral. If the scan tool PNP Switch parameter is not Park/Neutral, refer to «PNP Switch Circuit Malfunction - 4T45-E (ME7/MN5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__pnp-switch-circuit-malfunction-4t45-e) , or «PNP Switch Circuit Malfunction - 6T40/6T45 (MH8)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__pnp-switch-circuit-malfunction-6t406t45) , or «PNP Switch Circuit Malfunction - 6T70 (MH2)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__pnp-switch-circuit-malfunction-6t70) .
4. Command the Starter Relay ON with the scan tool, or turn the ignition switch to the START position. The starter solenoid should engage and the engine should crank. If the solenoid does not engage, refer to «Start Relay Circuit Malfunction»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__start-relay-circuit-malfunction) . If the solenoid engages but the engine does not crank, refer to «Starter Solenoid Clicks, Engine Does Not Crank»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

PNP Switch Circuit Malfunction - 4T45-E (ME7/MN5)

1. Inspect the shift control cable for proper adjustment. Refer to «Shift Control Cable Adjustment»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-4t45-e-repair-instructions-on-vehicle__shift-control-cable-adjustment) .
2. Inspect the PNP switch for proper adjustment. Refer to «Park/Neutral Position Switch Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-4t45-e-repair-instructions-on-vehicle) .
3. Ignition OFF. Disconnect the harness connector at the PNP switch.
4. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 45 seconds. Test for less than 5 ohms between the switch ground circuit terminal 1 and ground. If the test lamp does not illuminate, test the ground circuit terminal 1 for an open/high resistance.
5. Ignition ON, verify the scan tool ECM PNP Switch parameter is In Gear. If not the specified value, test the signal circuit terminal 12 for a short to ground. If the circuit tests normal, replace the ECM.
6. Install a 3A fused jumper wire between the ground circuit terminal 1 and the signal circuit terminal 12. Verify that the scan tool ECM PNP Switch parameter is Park/Neutral. If not the specified value, test the signal circuit terminal 12 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
7. If all circuits test normal, test or replace the PNP switch.

PNP Switch Circuit Malfunction - 6T40/6T45 (MH8)

1. Inspect the range selector lever cable for proper adjustment. Refer to «Range Selector Lever Cable Adjustment»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t306t406t45-repair-instructions-on-vehicle__range-selector-lever-cable-adjustment) .
2. Ignition OFF, disconnect the harness connector at the transmission inline 20-way connector.
3. Ignition ON, test for greater than 10 volts on the park/neutral signal circuit terminal 3. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition OFF, remove the control valve body cover. Refer to «Control Valve Body Cover Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t306t406t45-repair-instructions-on-vehicle) .
5. Connect the transmission inline 20-way connector, with the cover removed.
6. Disconnect the shift position switch connector from the TCM. Refer to «Control Solenoid Valve and Transmission Control Module Assembly Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t306t406t45-repair-instructions-on-vehicle) .
7. Ignition ON, verify that the scan tool ECM PNP Switch parameter is In Gear. If not the specified value, replace the ECM.
8. Connect a 3A fused jumper wire between the park/neutral signal terminal F of the TCM and ground. The scan tool PNP Switch parameter should be Park/Neutral when the terminal is connected to ground. If not the specified value, replace the ECM.
9. If all circuits test normal, test or replace the shift position switch.

PNP Switch Circuit Malfunction - 6T70 (MH2)

1. Inspect the range selector lever cable for proper adjustment. Refer to «Range Selector Lever Cable Adjustment»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t706t75-repair-instructions-on-vehicle__range-selector-lever-cable-adjustment) .
2. Ignition OFF, disconnect the harness connector at the transmission inline 20-way connector.
3. Ignition ON, test for greater than 10 volts on the park/neutral signal circuit terminal 20. If there is less than 10 volts on the park/neutral signal circuit, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition OFF, remove the control valve body cover. Refer to «Control Valve Body Cover Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t706t75-repair-instructions-on-vehicle) .
5. Connect the transmission inline 20-way connector, with the cover removed.
6. Disconnect the internal mode switch connector at the control solenoid valve assembly.
7. Ignition ON, verify that the scan tool PNP Switch parameter is In Gear. If not the specified value, replace the ECM.
8. Connect a 3A fused jumper wire between the park/neutral signal terminal F at the control solenoid valve assembly and ground. The scan tool PNP Switch parameter should be Park/Neutral when the terminal is connected to ground. If not the specified value, replace the ECM.
9. If all circuits test normal, test or replace the internal mode switch.

Start Relay Circuit Malfunction

1. Ignition OFF, disconnect the START relay.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 45 seconds. Test for less than 5 ohms between the relay ground circuit terminal 85 and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Connect a test lamp between the relay coil ground circuit terminal 85 and the relay coil control circuit terminal 86.
5. Ignition ON, transmission in Park, turn the ignition switch between the start and run positions. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the relay coil control circuit for a short to voltage. If the circuit tests normal, replace the ECM. If the test lamp is always OFF, test the relay coil control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
6. Connect the START relay.
7. Install a test lamp between the starter terminal A X1 and ground.
8. Ignition ON, transmission in Park, turn the ignition switch to the start position. The test lamp should illuminate. If the test lamp does not illuminate, test the starter control circuit terminal 87 for an open/high resistance. If the circuit tests normal, test or replace the START relay.
9. If all circuits test normal, test or replace the starter.

PNP Switch (ME7/MN5)

1. Ignition OFF, disconnect the harness connector at the PNP switch.
2. With the PNP switch in the following positions, test for infinite resistance between the ground terminal 1 and the signal terminal 12. R OD D 2 1 If not the specified value, replace the PNP switch.
3. With the PNP switch in the following positions, test for less than 2 ohms between the ground terminal 1 and the signal terminal 12. P N If greater than the specified range, replace the PNP switch.

START Relay

1. Ignition OFF, disconnect the START relay.
2. Test for 60-180 ohms between terminals 85 and 86. If not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 86 30 and 87 30 and 85 85 and 87 If not the specified value, replace the relay.
4. Install a 20A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Range Selector Lever Cable Adjustment»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t706t75-repair-instructions-on-vehicle__range-selector-lever-cable-adjustment) for the 6T70 (MH2) transmission.
2. «Shift Control Cable Adjustment»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-4t45-e-repair-instructions-on-vehicle__shift-control-cable-adjustment) for the 4T45-E (ME7/MN5) transmission.
3. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
4. «Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t306t406t45-repair-instructions-on-vehicle__manual-shift-detent-lever-with-shaft) for the 6T40/6T45 (MH8) transmission.
5. «Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Removal»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t706t75-repair-instructions-off-vehicle) for the 6T70 (MH2) transmission.
6. «Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Installation»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-6t706t75-repair-instructions-off-vehicle) for the 6T70 (MH2) transmission.
7. «Park/Neutral Position Switch Replacement»(/chevrolet/malibu/vii-2008-2012/remont/automatic-trans/#automatic-transaxle-4t45-e-repair-instructions-on-vehicle) for the 4T45-E (ME7/MN5) transmission.
8. «Starter Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
9. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the START position. The BCM then sends a serial data message to the engine control module (ECM) that crank has been requested. The ECM monitors the park/neutral position switch. If the transmission is in Park or Neutral, and there are no DTCs that inhibit engine starting, then the ECM supplies voltage to the control circuit of the START relay. When this occurs, battery voltage is supplied through the START relay to S terminal of the starter solenoid. The starter solenoid energizes, and supplies battery voltage to the starter from the B terminal to crank the engine.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Starting System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Attempt to start the engine. Verify that the starter solenoid clicks.

1. If the starter solenoid does not click, refer to «Starter Solenoid Does Not Click»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. If the engine cranks slowly, refer to «Engine Cranks Slowly»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__engine-cranks-slowly) .

1. Verify that the battery is sufficiently charged and that the battery cables are clean and tight. Refer to «Charging System Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) . If the battery is not sufficiently charged, refer to «Battery Charging»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) . If the battery cables are not clean and tight, refer to «Fastener Tightening Specifications»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system__fastener-tightening-specifications) .
2. Using a DMM, measure voltage between the positive battery terminal and terminal B at the solenoid as the ignition switch is turned to the START position. Voltage should be less than 0.5 volt. If greater than the specified value, replace the battery cable.
3. Using a DMM, measure voltage between the negative battery terminal and the starter motor case as the ignition switch is turned to the START position. Voltage should be less than 0.5 volt. If greater than the specified value, replace the battery cable.
4. Remove the drive belt. Refer to one of the following: «Drive Belt Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) or «Drive Belt Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) for the 2.4L (LAT) engine «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) for the 3.5L (LZ4) engine «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) for the 3.6L (LY7) engine
5. Attempt to start the engine, with the drive belt removed. If the engine cranks, inspect the engine accessories and belt drive system for mechanical binding.
6. Attempt to rotate the crankshaft using a breaker bar, or other suitable tool. Verify that the engine is not seized. If the engine is seized, refer to one of the following: «Engine Will Not Crank - Crankshaft Will Not Rotate»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-diagnostic-information-and-procedures__engine-will-not-crank-crankshaft) for the 2.4L (LAT) engine «Engine Will Not Crank - Crankshaft Will Not Rotate»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-diagnostic-information-and-procedures__engine-will-not-crank-crankshaft) for the 3.5L (LZ4) engine «Engine Will Not Crank - Crankshaft Will Not Rotate»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-diagnostic-information-and-procedures__engine-will-not-crank-crankshaft) for the 3.6L (LY7) engine
7. If all circuits test normal, replace the starter motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Battery Charging»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Battery Negative Cable Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)
3. «Starter Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Engine Cranks Slowly

Inspect the following items

1. Battery - Perform the Battery Inspection/Test. Refer to «Battery Inspection/Test»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Wiring - Inspect the wiring for damage. Inspect all connections to the starter motor, the solenoid, the battery, and all ground connections. Refer to «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing) , «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs) , «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures) , and «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs) .
3. Engine - Verify that the engine is not seized.

If the battery, the wiring, and the engine are functioning properly, and the engine continues to crank slowly, replace the starter motor. Refer to Starter Replacement (LAT) or Starter Replacement (LE5 or LE9) or Starter Replacement (LZ4 or LZE) or Starter Replacement (LY7) .

Note. This procedure is not used in Brazil.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/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»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The PG starter motors are non-repairable. They have pole pieces that are arranged around the armature. Both solenoid windings are energized. The pull-in winding circuit is completed to the ground through the starter motor. The windings work together magnetically to pull and hold in the plunger. The plunger moves the shift lever. This action causes the starter drive assembly to rotate on the armature shaft spline as it engages with the flywheel ring gear on the engine. Moving at the same time, the plunger also closes the solenoid switch contacts in the starter solenoid. Full battery voltage is applied directly to the starter motor and it cranks the engine.

Description and Operation

Starting System Description and Operation

Start the engine. Listen to the starter noise, while the engine is cranking. Compare the concern to a similar vehicle.

1. Remove the flywheel inspection cover.
2. Inspect the flywheel for the following: Loose flywheel bolts Chipped gear teeth Missing gear teeth Bent flywheel Debris in the bell housing If not within specifications, remove the debris, tighten the flywheel bolts, or repair or replace the flywheel.
3. If all inspections were within specification, replace the starter motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Fastener Tightening Specifications (LAT, LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-specifications__fastener-tightening-specifications-lat-le5) or «Fastener Tightening Specifications (LE9)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-specifications__fastener-tightening-specifications-le9) for the 2.4L (LE5) engine
2. «Fastener Tightening Specifications»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-specifications__fastener-tightening-specifications) for the 3.5L (LZ4) engine
3. «Fastener Tightening Specifications»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-specifications__fastener-tightening-specifications) for the 3.6L (LY7) engine
4. «Engine Flywheel Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) for the 2.4L (LE5) engine
5. «Engine Flywheel Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) for the 3.5L (LZ4) engine
6. «Engine Flywheel Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-2-of-2) for the 3.6L (LY7) engine
7. «Starter Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system)

Removal Procedure

1. Turn on the radio and record all of the customer's radio station presets.
2. Ensure that all lamps and accessories are turned off.
3. Turn the ignition OFF and remove the ignition key.
4. Open the hood.
5. Remove the generator battery control module cover. Refer to «Generator Control Module Cover Replacement»(/chevrolet/malibu/vii-2008-2012/remont/engine-control-systems/#hybrid-engine-controls-repair-instructions) .
6. Loosen the negative battery cable nut (1).
7. Remove the negative battery cable (2) from the battery.

Installation Procedure

1. Install the negative battery cable (2) to the battery.
2. Tighten the negative battery cable nut (1) and tighten the nut to 10 N.m (89 lb in).
3. Install the generator battery control module cover. Refer to «Generator Control Module Cover Replacement»(/chevrolet/malibu/vii-2008-2012/remont/engine-control-systems/#hybrid-engine-controls-repair-instructions) .
4. Close the hood.
5. Insert the ignition key and turn the ignition to the ON position.
6. Program all of the customer's radio station presets and set the radio clock to the current time.

Disconnect Procedure

1. Record all of the vehicle preset radio stations.
2. Turn OFF all the lamps and the accessories.
3. Make sure the ignition switch is in the OFF position.
4. Remove the battery cover. Disengage the retainers in order to remove the cover.
5. Disconnect the negative battery cable from the battery.

Connect Procedure

1. Connect the negative battery cable to the battery and tighten to 17 N.m (13 lb ft).
2. Install the battery cover. Install the locking tab next to the strut tower first. Install the locking tab next to the engine second. Install the locking tab next to the powertrain control module (PCM) last.
3. Reset the radio stations and the clock.
4. Re-initialize the power windows. Refer to «Power Window Reinitialization»(/chevrolet/malibu/vii-2008-2012/remont/heated-glassdefoggers/#fixed-and-moveable-windows-system__power-window-reinitialization) .

1. Remove the negative battery cable. Refer to «Battery Negative Cable Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Ensure that the location measurement of the battery current sensor was recorded for reference during installation.
3. Squeeze the ground ends of the negative battery cable together and remove the sensor (1) from the cable.

1. Install the battery current sensor (1) by passing the ground ends of the negative battery cable through the sensor.
2. Measure from the same end as earlier, and slide the current sensor to that measurement on the negative battery cable.
3. Install the battery negative cable. Refer to «Battery Negative Cable Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LE5 or LE9)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LZ4 or LZE)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the negative battery cable ground nut (1) from the engine block stud.
3. Remove the negative battery cable ground lead (2) from the stud.
4. Remove the negative battery cable ground nut (3) from the tie bar stud.
5. Remove the negative battery cable ground lead (4) from the stud.
6. Disconnect the body wiring harness electrical connector (2) from the battery current sensor (1).
7. Cut the tape (1) securing the negative cable to the positive cable.
8. Remove the negative battery cable assembly (3).
9. Place the cable assembly on a clean work surface.
10. Measure from one end of the negative battery cable to the current sensor location. Record this measurement for reference during installation.
11. Remove the battery current sensor (2) from the negative battery cable.

1. Install the battery current sensor (2) to the NEW negative battery cable.
2. Measure from the same end as earlier, and slide the current sensor to that measurement on the negative battery cable.
3. Place the NEW negative battery cable (3) next to the positive battery cable (4).
4. Install NEW tape (1) securing the negative cable to the positive cable.
5. Connect the body wiring harness electrical connector (2) to the battery current sensor (1).
6. Install the negative battery cable ground lead (4) to the tie bar stud.
7. Install the negative battery cable ground nut (3) to the stud and tighten the nut to 10 N.m (89 lb in).
8. Install the negative battery cable ground lead (2) to the engine block stud.
9. Install the negative battery cable ground nut (1) to the stud and tighten the nut to 10 N.m (89 lb in).
10. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the negative cable ground terminal nut at the tie bar.
3. Remove the tape holding the positive cable to the negative cable.
4. Remove the negative cable from the retainers.
5. For vehicles equipped with a 6T45 transmission, remove the engine harness ground lead fastener (1).
6. For vehicles equipped with a 4T45 transmission, remove the engine harness ground lead fastener (2).
7. Remove the negative cable.

1. Install the negative cable.
2. For vehicles equipped with a 4T45 transmission, install the engine harness ground lead fastener (2) and tighten to 10 N.m (89 lb in).
3. For vehicles equipped with a 6T45 transmission, Install the engine harness ground lead fastener (1) and tighten to 10 N.m (89 lb in).
4. Install tape holding the positive cable to the negative cable.
5. Install the negative battery cable clip to the battery tray.
6. Install the negative cable ground terminal nut at the tie bar and tighten to 10 N.m (89 lb in).
7. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the negative cable ground terminal nut at the tie bar.
3. Remove the negative battery cable clip from the battery tray.
4. Remove the tape holding the positive cable to the negative cable.
5. Remove the negative cable from the retainers.
6. Remove the battery cable/ground cable lead nut (2) from the transmission stud.
7. Remove the engine harness and negative battery cable leads.
8. Remove the ground cable.

1. Install the ground cable.
2. Install the negative battery cable and engine harness leads. CAUTION: Refer to «Fastener Caution»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#dangers-warnings-and-cautions__fastener-caution) .
3. Install the battery cable/ground cable lead nut (2) to the transmission stud. Tighten the nut to 25 N.m (18 lb ft).
4. Install the negative cable to the retainers.
5. Install tape to hold the positive cable to the negative cable.
6. Install the negative battery cable clip to the battery tray.
7. Install the negative cable ground terminal nut at the tie bar and tighten to 10 N.m (89 lb in).
8. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the battery box cover.
2. Remove the air intake duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
3. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Disconnect the battery current sensor.
5. Remove the retaining nut from the ground wire.
6. Remove the ground wire.
7. Remove the retaining clip for the negative battery cable.
8. Remove the retaining nut for the ground wire (4).
9. Remove the engine harness ground lead (3).
10. Remove the battery cable ground lead (2) from the stud/nut (1).
11. Remove the negative battery cable from the engine harness.

1. Position the negative cable between the battery and the engine block.
2. Install the negative cable ground (2) to the stud/nut (1).
3. Install the engine harness ground lead (3).
4. Install the retaining nut for the ground wire (4) and tighten to 25 N.m (18 lb ft).
5. Install the retaining clip for the battery cable.
6. Install the ground wire.
7. Install the retaining nut for the ground wire.
8. Connect the negative cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
9. Install the battery box cover.
10. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
3. Disconnect the engine wiring harness electrical connector (1) from the starter.
4. Remove the positive battery cable to starter motor nut (1).
5. Remove the positive battery cable lead (2) from the starter motor.
6. Remove the positive battery cable clip (2) from the oil level indicator tube bracket (1).
7. Lower the vehicle.
8. Disengage the two side retaining tabs on the positive battery cable cover (1), and open the cover.
9. Remove the battery positive cable extension cable nut (2).
10. Remove the battery positive cable extension cable lead (3) from the positive battery cable.
11. Remove the underhood bussed electrical connector (UBEC) cover (1).
12. Loosen the integral bolt (5) on the positive battery cable lead (4) and remove the lead from the UBEC.
13. Loosen the positive battery cable nut (2).
14. Remove the positive battery cable (3) from the battery.
15. Cut, remove and discard the tape (1) securing the positive cable to the negative cable.
16. Separate the positive battery cable (4) from the negative battery cable (3).
17. Remove the positive battery cable assembly.

1. Place the NEW positive battery cable (4) next to the negative battery cable (3).
2. Install NEW tape (1) securing the positive cable to the negative cable.
3. Place the positive battery cable assembly into position in the vehicle as noted during removal.
4. Install the positive battery cable (3) to the battery.
5. Tighten the positive battery cable nut (2) to 10 N.m (89 lb in).
6. Position positive battery cable lead (4) to the UBEC and tighten the integral bolt (5) to 5 N.m (44 lb in).
7. Install the UBEC cover (1).
8. Install the battery positive cable extension cable lead (3) to the positive battery cable.
9. Install the battery positive cable extension cable nut (2) and tighten to 10 N.m (89 lb in).
10. Close the positive battery cable cover (1).
11. Install the positive battery cable clip (2) to the oil level indicator tube bracket (1).
12. Raise and suitably support the vehicle.
13. Install the positive battery cable lead (2) to the starter motor.
14. Install the positive battery cable to starter motor nut (1) and tighten to 10 N.m (89 lb in).
15. Connect the engine wiring harness electrical connector (1) to the starter.
16. Lower the vehicle.
17. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Loosen the positive battery cable nut (1) and remove the positive battery cable (2) from the battery.
3. Loosen the positive battery cable bolt at the junction block and remove the cable from the junction block.
4. Remove the positive battery cable clip from the battery tray.
5. Remove the tape holding the negative battery cable to the positive battery cable.
6. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
7. Remove the positive battery cable nut (1) from the starter solenoid.
8. Remove the positive battery cable (2) from the starter solenoid.
9. Lower the vehicle.
10. Remove the positive battery cable.

1. Install the positive battery cable.
2. Raise and the vehicle.
3. Install the positive battery cable (2) to the starter solenoid.
4. Install the positive battery cable nut (1) to the starter solenoid and tighten to 10 N.m (89 lb in).
5. Lower the vehicle.
6. Install the positive battery cable to the junction block and tighten the positive battery cable bolt (6) and tighten to 10 N.m (89 lb in).
7. Install the positive battery cable clip to the battery tray.
8. Install tape in order to secure the negative battery cable to the positive battery cable.
9. Position the positive battery cable (2) to the battery.
10. Tighten the positive battery cable nut (1) to 10 N.m (89 lb in).
11. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Loosen the positive battery cable bolt and remove the positive battery cable from the battery.
3. Loosen the positive battery cable bolt at the junction block and remove the cable from the junction block.
4. Remove the positive battery cable clip from the battery tray.
5. Remove the tape holding the negative battery cable to the positive battery cable.
6. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
7. Remove the positive battery cable nut (3) from the starter solenoid.
8. Remove the positive battery cable (1) from the starter solenoid.
9. Lower the vehicle.
10. Remove the positive battery cable.

1. Install the positive battery cable.
2. Raise and the vehicle.
3. Install the positive battery cable (1) to the starter solenoid.
4. Install the positive battery cable nut (3) to the starter solenoid. Tighten the nut to 10 N.m (89 lb in).
5. Lower the vehicle.
6. Install the positive battery cable to the junction block and tighten the positive battery cable bolt. Tighten the bolt to 10 N.m (89 lb in).
7. Install the positive battery cable clip (4) to the battery tray.
8. Install tape in order to secure the negative battery cable to the positive battery cable.
9. Position the positive battery cable to the battery.
10. Tighten the positive battery cable bolt to 17 N.m (13 lb ft).
11. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the battery positive cable from the battery.
3. Loosen the battery positive cable bolt (4) at the junction block and remove the cable from the junction block.
4. Remove the battery positive cable clip (3) from the battery tray.
5. Remove the tape holding the battery negative cable to the battery positive cable.
6. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
7. Remove the battery positive cable retainer bolt (1) from the engine block.
8. Remove the battery positive cable nut (2) from the starter solenoid.
9. Remove the battery positive cable terminal (3) from the starter solenoid.
10. Lower the vehicle.
11. Remove the battery positive cable from the vehicle.

1. Route the battery positive cable to the starter and the battery.
2. Raise the vehicle.
3. Install the battery positive cable retainer bolt (1) to the engine block and tighten to 15 N.m (11 lb ft).
4. Install the battery positive cable terminal (3) and nut (2) to the starter solenoid stud and tighten to 13 N.m (115 lb in).
5. Lower the vehicle.
6. Install the battery positive cable bolt (4) to the junction block and tighten to 10 N.m (89 lb in).
7. Install the battery positive cable clip (3) to the battery tray.
8. Install tape to secure the battery negative cable to the battery positive cable.
9. Install the battery positive cable to the positive terminal of the battery.
10. Tighten the battery positive cable bolt and tighten to 17 N.m (13 lb ft).
11. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disengage the two side retaining tabs on the positive battery cable cover (1), and open the cover.
3. Loosen the positive battery cable nut (2).
4. Remove the positive battery cable (3) from the battery.
5. Reposition the positive battery cable out of the way.
6. Remove the battery hold down retainer bolt (1) and retainer (2).
7. Remove the battery (3) from the vehicle.

1. Install the battery (3) to the vehicle.
2. Install the battery hold down retainer (2) and bolt (1). Tighten the bolt to 15 N.m (11 lb ft).
3. Position the positive battery cable to the battery.
4. Install the positive battery cable (3) to the battery.
5. Tighten the positive battery cable nut (2) to 10 N.m (89 lb in).
6. Close the positive battery cable cover (1).
7. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the battery box cover (1).
2. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Disconnect the positive battery cable (2).
4. Remove the battery tie down bolt (1).
5. Remove the battery hold down retainer (2).
6. Remove the battery from the battery tray (3).

1. Position the battery in the battery tray (3).
2. Install the battery hold down retainer (2).
3. Install the battery hold down retainer bolt (1) and tighten to 15 N.m (11 lb ft).
4. Install the positive battery cable (2) and tighten to 10 N.m (89 lb in).
5. Install the negative battery cable and tighten the bolt to 10 N.m (89 lb in).
6. Install the battery box cover (1).

1. Remove the battery. Refer to «Battery Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the underhood bussed electrical center (UBEC) cover.
3. Loosen the integral bolt (5) on the positive battery cable lead (4) and remove the lead from the UBEC.
4. Reposition the positive battery cable out of the way.
5. Loosen the integral bolt (4) on the steering column harness package lead and remove the lead from the UBEC.
6. Loosen the junction block bolts (6), once loose, tap the bolts once in order the disengage the bolts from the electrical connectors.
7. Remove the junction block (2).
8. Remove the engine wiring harness UBEC electrical connector (3) from the UBEC bracket and secure out of the way.
9. Remove the forward lamp wiring harness UBEC electrical connector (4) from the UBEC bracket and secure out of the way.
10. Remove the body wiring harness UBEC electrical connectors (5) from the UBEC bracket and secure out of the way.
11. Disconnect the body wiring harness electrical connector (1) from the engine control module (ECM).
12. Disconnect the engine wiring harness electrical connectors (2) from the ECM.
13. Remove the engine wiring harness clips (3) from the ECM/transmission control module (TCM) bracket (4).
14. Disconnect the engine wiring harness electrical connector (1) from the TCM.
15. Remove the ECM/TCM bracket bolt (1).
16. Slide the ECM/TCM bracket up and remove the bracket (2) (With the ECM and TCM still attached) from the battery tray.
17. Remove the battery tray bolts (1), nut (2), and battery tray (3).

1. Set the battery tray (3) into position and install the bolts (1), and nut (2). Tighten the bolts to 25 N.m (18 lb ft).
2. Slide the ECM/TCM bracket (2) into position on the battery tray.
3. Install the ECM/TCM bracket bolt (1) and tighten to 8 N.m (71 lb in).
4. Connect the engine wiring harness electrical connector (1) to the TCM.
5. Connect the engine wiring harness electrical connectors (2) to the ECM.
6. Install the engine wiring harness clips (3) to the ECM/TCM bracket (4).
7. Connect the body wiring harness electrical connector (1) to the ECM.
8. Position the body wiring harness UBEC electrical connectors (5) to the UBEC bracket and snap into place.
9. Position the forward lamp wiring harness UBEC electrical connector (4) to the UBEC bracket and snap into place.
10. Position the engine wiring harness UBEC electrical connector (3) to the UBEC bracket and snap into place.
11. Install junction block (2).
12. Tighten the junction block bolts (6) until the bolts engage the electrical connectors, an audible click will be heard. Tighten the bolts to 4 N.m (35 lb in).
13. Position the steering column harness package lead to the UBEC and tighten the integral bolt (4). Tighten the bolt to 5 N.m (44 lb in).
14. Position the positive battery cable to the battery.
15. Position positive battery cable lead (4) to the UBEC and tighten the integral bolt (5). Tighten the bolt to 5 N.m (44 lb in).
16. Install the UBEC cover.
17. Install the battery. Refer to «Battery Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the battery. Refer to «Battery Replacement (without LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the engine control module (ECM). Refer to one of the following: «Engine Control Module Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-24l-repair-instructions__engine-control-module-replacement-le5) for the 2.4L engine «Engine Control Module Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__engine-control-module-replacement) for the 3.5L engine «Engine Control Module Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions__engine-control-module-replacement) for the 3.6L engine
3. Remove the junction block. Refer to «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
4. Remove the air duct retainer, if equipped.
5. Remove the air duct from the battery tray, if equipped.
6. Remove the mounting bolts for the battery tray.
7. Remove the battery tray.
8. Remove the stud nut (1) from the frame rail.
9. Remove the mounting bolts (2).
10. Remove the battery tray support.

1. Position the battery tray support on the frame rail.
2. Install the stud nut (1) and tighten to 25 N.m (18 lb ft).
3. Install the mounting bolts (2) and tighten to 25 N.m (18 lb ft).
4. Position the battery tray on the support.
5. Install the mounting bolts for the battery tray. Tighten the nut to 16 N.m (12 lb ft).
6. Install the air duct into the battery tray, if equipped.
7. Install the air duct retainer, if equipped.
8. Install the junction block. Refer to «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) .
9. Install the ECM. Refer to one of the following: «Engine Control Module Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-24l-repair-instructions__engine-control-module-replacement-le5) for the 2.4L engine «Engine Control Module Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__engine-control-module-replacement) for the 3.5L engine «Engine Control Module Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions__engine-control-module-replacement) for the 3.6L engine
10. Install the battery. Refer to «Battery Replacement (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
3. Disconnect the engine wiring harness electrical connector (2) from the generator control module coolant pump (1).
4. Remove the generator control module coolant pump bolt (3).
5. Remove the generator control module coolant pump (1), with the hoses attached, from the oil pan.
6. Reposition and secure the generator control module coolant pump, with the hoses attached, out of the way.
7. Disconnect the engine wiring harness electrical connector (1) from the starter.
8. Remove the positive battery cable to starter motor nut (1).
9. Remove the positive battery cable lead (2) from the starter motor.
10. Remove the starter motor bolts and starter.

1. Install the starter motor and bolts and tighten to 53 N.m (39 lb ft).
2. Install the positive battery cable lead (2) to the starter motor.
3. Install the positive battery cable to starter motor nut (1) and tighten to 10 N.m (89 lb in).
4. Connect the engine wiring harness electrical connector (1) to the starter.
5. Unsecure the generator control module coolant pump.
6. Position the generator control module coolant pump (1), with the hoses attached, to the oil pan. Ensure that the anti-rotation tab (2) is inserted into the hole in the oil pan.
7. Install the generator control module coolant pump bolt (3) and tighten to 22 N.m (16 lb ft).
8. Connect the engine wiring harness electrical connector (2) to the generator control module coolant pump (1).
9. Lower the vehicle.
10. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
3. Remove the S terminal connector from the starter solenoid.
4. Remove the engine harness lead (2) from the starter.
5. Remove the positive battery cable nut (2) from the starter solenoid.
6. Remove the positive battery cable (3) and engine harness terminal (4) from the starter solenoid.
7. Remove the starter motor bolts.
8. Remove the starter motor.

1. Install the starter motor.
2. Install the starter motor bolts and tighten to 40 N.m (30 lb ft).
3. Install the engine harness terminal (4) and positive battery cable (3) to the starter solenoid.
4. Install the positive battery cable nut (2) to the starter solenoid and tighten to 10 N.m (89 lb in).
5. Install the engine harness lead (2) to the starter.
6. Install the S terminal connector to the starter solenoid.
7. Lower the vehicle.
8. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
3. Remove the flywheel inspection cover bolts.
4. Remove the flywheel inspection cover.
5. Remove the electrical connections from the starter motor.
6. Remove the starter motor mounting bolts.
7. Remove the starter motor.

1. Install the starter motor to the engine.
2. Install the starter motor mounting bolts and tighten to 40 N.m (30 lb ft).
3. Install the electrical connection to the battery terminal on the solenoid and tighten the battery terminal nut to 17 N.m (13 lb ft).
4. Install the electrical connections to the S terminal on the solenoid and tighten the solenoid S terminal nut to 3 N.m (27 lb in).
5. Install the flywheel inspection cover.
6. Install the flywheel inspection cover bolts and tighten to 10 N.m (89 lb in).
7. Lower vehicle.
8. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/ignition-switchsteering-lock/#general-information) .
3. Remove the starter solenoid BAT terminal nut.
4. Disconnect the engine harness electrical connector.
5. Unclip battery positive cable from starter bracket.
6. Disconnect the starter motor bolts and the starter.

1. Position the starter motor to the engine block.
2. Install the starter bolts and tighten to 50 N.m (37 lb ft).
3. Connect the electrical connector to the starter.
4. Install the starter solenoid BAT terminal nut and tighten to 13 N.m (115 lb in).
5. Install the knock sensor bank 2. Refer to «Knock Sensor Replacement - Bank 2»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
6. Install the left catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/exhaust/#engine-exhaust-system) .
7. Lower the vehicle.
8. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Rotate the drive belt tensioner counterclockwise.
3. Remove the accessory drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) .
4. Remove the generator. Refer to «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
5. Remove the drive belt tensioner bolt.
6. Remove the drive belt tensioner.
7. Remove the drive belt idler pulley bolt.
8. Remove the drive belt idler pulley.
9. Remove the generator bracket bolts.
10. Remove the generator bracket.

1. Install the generator bracket.
2. Install the generator bracket bolts and tighten in sequence to 50 N.m (37 lb ft).
3. Install the drive belt tensioner.
4. Install the drive belt tensioner bolt and tighten to 50 N.m (37 lb ft).
5. Install the drive belt idler pulley.
6. Install the drive belt idler pulley bolt and tighten to 50 N.m (37 lb ft).
7. Install the generator. Refer to «Generator Replacement (LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LZ4)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
8. Rotate the drive belt tensioner counterclockwise.
9. Install the accessory drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) .
10. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LAT)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/malibu/vii-2008-2012/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
3. Reposition the positive battery cable boot at the generator terminal.
4. Remove the positive battery cable nut at the generator.
5. Remove the positive battery cable terminal from the generator.
6. Disconnect the engine harness electrical connector from the generator.
7. Remove the drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
8. Remove the idler pulley. Refer to «Drive Belt Idler Pulley Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
9. Remove the generator bolts.
10. Remove the generator.

1. Position the generator to the engine.
2. Loosely install the generator bolts.
3. Install the idler pulley. Refer to «Drive Belt Idler Pulley Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
4. Tighten the generator bolts in the sequence shown to 50 N.m (37 lb ft).
5. Install the drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
6. Connect the engine harness electrical connector to the generator.
7. Install the positive battery cable terminal to the generator.
8. Install the positive battery cable nut at the generator and tighten to 20 N.m (15 lb ft).
9. Position the positive battery cable boot at the generator terminal.
10. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the drive belt. Refer to «Drive Belt Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) .
3. Disconnect the generator electrical connector (1).
4. Reposition the rubber boot (3).
5. Remove the engine harness terminal lead to generator nut (2).
6. Remove the engine harness terminal (4) from the generator stud.
7. Remove the generator fasteners (1,3, 4).
8. Remove the generator.

1. Position the generator to the engine block.
2. Install the generator fasteners (4) loosely.
3. Install the fastener (1) and tighten to 10 N.m (89 lb in).
4. Install the fastener (3) and tighten to 22 N.m (16 lb ft).
5. Tighten the fasteners (4) to 22 N.m (16 lb ft).
6. Install the engine harness terminal (4) to the generator stud.
7. Install the engine harness terminal lead to generator nut (2) and tighten to 20 N.m (15 lb ft).
8. Position the rubber boot (3) over the stud.
9. Connect the generator electrical connector (1).
10. Install the drive belt. Refer to «Drive Belt Replacement (LE5)»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-24l-repair-instructions-on-vehicle) .
11. Connect negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Note. Service the generator as a complete unit.

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) .
3. Remove the generator electrical connections.
4. Remove the generator mounting nuts and bolts.
5. Remove the generator.

1. Install the generator. Tighten the bolts to 50 N.m (37 lb ft). Tighten the nuts to 30 N.m (22 lb ft).
2. Install the generator electrical connections.
3. Install the drive belt. Refer to «Drive Belt Replacement»(/chevrolet/malibu/vii-2008-2012/remont/mechanical/#engine-mechanical-35l-repair-instructions-on-vehicle) .
4. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LE5, LE9, LZ4, LZE, or LY7)»(/chevrolet/malibu/vii-2008-2012/remont/charging-system/#battery-charging-system-and-starting-system) .

Scheme 3

Note. Because of the materials used in the manufacture of automotive lead-acid batteries, dealers and service shops that handle them are subject to various regulations issued by OSHA, EPA, DOT, and various state or local agencies. Other regulations may also apply in other locations. Always know and follow these regulations when handling batteries.

Batteries that are no longer wanted must be disposed of by an approved battery recycler and must never be thrown in the trash or sent to a landfill.

Batteries that are not part of the vehicle itself, not the battery under the hood, must only be transported on public streets for business purposes via approved hazardous material transportation procedures.

Battery storage, charging, and testing facilities in repair shops must meet various requirements for ventilation, safety equipment, material segregation, etc.

The maintenance-free battery is standard. There are no vent plugs in the cover. The battery is completely sealed except for 2 small vent holes in the side. These vent holes allow the small amount of gas that is produced in the battery to escape.

The battery has 3 functions as a major source of energy

1. Engine cranking
2. Voltage stabilizer
3. Alternate source of energy with generator overload

The battery specification label, example below, contains information about the following

1. The test ratings
2. The original equipment catalog number
3. The recommended replacement model number

Scheme 4

Battery Ratings

A battery may have 3 ratings

1. Amp hour
2. Reserve capacity
3. Cold cranking amperage

When a battery is replaced, use a battery with similar ratings. Refer to the battery specification label on the original battery or refer to Battery Usage .

Amp Hour

The amp hour rating of a battery is the amount of time it takes a fully charged battery, being discharged at a constant rate of 1 amperes and a constant temperature of 27°C (80°F), to reach a terminal voltage of 10.5 volts. Refer to Battery Usage for the amp hour rating of the original equipment battery.

Reserve Capacity

Reserve capacity is the amount of time in minutes it takes a fully charged battery, being discharged at a constant rate of 25 amperes and a constant temperature of 27°C (80°F), to reach a terminal voltage of 10.5 volts. Refer to Battery Usage for the reserve capacity rating of the original equipment battery.

Cold Cranking Amperage

The cold cranking amperage is an indication of the ability of the battery to crank the engine at cold temperatures. The cold cranking amperage rating is the minimum amperage the battery must maintain for 30 seconds at -18°C (0°F) while maintaining at least 7.2 volts. Refer to Battery Usage for the cold cranking amperage rating for this vehicle.

Generator

The generator features the following major components

1. The delta stator
2. The rectifier bridge
3. The rotor with slip rings and brushes
4. A conventional pulley
5. Dual internal fans
6. The regulator

The pulley and the fan cool the slip ring and the frame.

The generator features permanently lubricated bearings. Service should only include tightening of mount components. Otherwise, replace the generator as a complete unit.

Regulator

The voltage regulator controls the rotor field current in order to limit the system voltage. When the field current is ON, the regulator switches the current ON and OFF at a rate of 400 cycles per second in order to perform the following functions

1. Radio noise control
2. Obtain the correct average current needed for proper system voltage control

At high speeds, the ON time may be 10 percent with the OFF time at 90 percent. At low speeds, the ON time may be 90 percent and the OFF time 10 percent.

Circuit Description

The generator provides voltage to operate the vehicle's electrical system and to charge its battery. A magnetic field is created when current flows through the rotor. This field rotates as the rotor is driven by the engine, creating an AC voltage in the stator windings. The AC voltage is converted to DC by the rectifier bridge and is supplied to the electrical system at the battery terminal.

When the engine is running, the generator turn-on signal is sent to the generator from the engine control module (ECM), turning on the regulator. The generator's voltage regulator controls current to the rotor, thereby controlling the output voltage. The rotor current is proportional to the electrical pulse width supplied by the regulator. When the engine is started, the regulator senses generator rotation by detecting AC voltage at the stator through an internal wire. Once the engine is running, the regulator varies the field current by controlling the pulse width. This regulates the generator output voltage for proper battery charging and electrical system operation. The generator F terminal is connected internally to the voltage regulator and externally to the ECM. When the voltage regulator detects a charging system problem, it grounds this circuit to signal the ECM that a problem exists. The ECM monitors the generator field duty cycle signal circuit.

Charging System Indicator

The instrument panel cluster (IPC) illuminates the charge indicator in the message center when the following occurs

1. The ECM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the ECM requesting illumination.
2. The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.
3. The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
4. The ignition is ON, with the engine OFF.

Electrical Power Management

The electrical power management (EPM) is used to monitor and control the charging system and alert the driver of possible problems within the charging system. The EPM system makes the most efficient use of the generator output, improves the battery state of charge (SOC), extends battery life, and manages system electrical loads.

The load shed operation is a means of reducing electrical loads during a low voltage or low battery SOC condition.

The idle boost operation is a means of improving generator performance during a low voltage or low battery SOC condition.

Each EPM function, either idle boost or load-shed, is discrete. No 2 functions are active at the same time. Idle boost is activated in incremental steps, idle boost 1 must be active before idle boost 2 can be active. The criteria used by the instrument panel module (IPM) to regulate EPM are outlined below

When the ignition switch is turned to the Start position, the body control module (BCM) receives battery voltage on the ignition 1 voltage circuit, and less than 5 volts on the off/run/crank voltage circuit. The BCM supplies voltage to energize the RUN/CRANK Relay 32. The BCM sends a high speed GMLAN serial data message to the engine control module (ECM) that the key is in the start position. The ECM receives the message from the BCM, and also receives a serial data message from the transmission control module (TCM) containing the shift lever position. If the shift lever is in Park or Neutral when ignition switch is turned to Start, the ECM supplies voltage to the START Relay 31. The START relay supplies voltage to the S terminal of the starter solenoid, through the 30 A STRTR Fuse 26, in order to crank the engine.

Starter Operation

The starter motors are non-repairable motors. They have pole pieces that are arranged around the armature. Both solenoid windings are energized. The pull-in winding circuit is completed to the ground through the starter motor. The windings work together magnetically to pull and hold in the plunger. The plunger moves the shift lever. This action causes the starter drive assembly to rotate on the armature shaft spline as it engages with the flywheel ring gear on the engine. Moving at the same time, the plunger also closes the solenoid switch contacts in the starter solenoid. Full battery voltage is applied directly to the starter motor and it cranks the engine.

As soon as the solenoid switch contacts close, current stops flowing thorough the pull-in winding because battery voltage is applied to both ends of the windings. The hold-in winding remains energized; its magnetic field is strong enough to hold the plunger, shift lever, starter drive assembly, and solenoid switch contacts in place to continue cranking the engine. When the engine starts, pinion overrun protects the armature from excessive speed until the switch is opened.

When the ignition switch is released from the START position, the START relay opens and battery voltage is removed from the starter solenoid S terminal. Current flows from the motor contacts through both windings to the ground at the end of the hold-in winding. However, the direction of the current flow through the pull-in winding is now opposite the direction of the current flow when the winding was first energized.

The magnetic fields of the pull-in and hold-in windings now oppose one another. This action of the windings, along with the help of the return spring, causes the starter drive assembly to disengage and the solenoid switch contacts to open simultaneously. As soon as the contacts open, the starter circuit is turned OFF.

Illustration Tool Number/Description J 38758 Parasitic Draw Test Switch J 41450-B Universal CS Generator Tester Harness J 42000 Battery Tester J 45681 Jumper Harness

Scheme 5

Scheme 6

Scheme 7

Scheme 8

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Body Control System Schematics
• Instrument Cluster Schematics
• SIR Schematics
• Radio/Navigation System Schematics
• Immobilizer Schematics
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• SIR Warning
• Diagnostic Repair Verification
• Antilock Brake System Schematics (without HP7)
• ABS Description and Operation (with LAT)
• ABS Description and Operation (without LAT)
• Power Steering Schematics
• Engine Controls Schematics (LAT)
• Engine Controls Schematics
• Engine Controls Schematics
• Relay Replacement (Attached to Wire Harness)
• Checking Aftermarket Accessories
• Battery Disconnect Warning
• Fastener Caution
• Body Control System Description and Operation
• Power Distribution Schematics
• Diagnostic Trouble Code (DTC) List - Vehicle
• Drive Belt Replacement (LE5)
• Drive Belt Replacement
• Drive Belt Replacement
• Shift Control Cable Adjustment
• Park/Neutral Position Switch Replacement
• Range Selector Lever Cable Adjustment
• Control Valve Body Cover Replacement
• Range Selector Lever Cable Adjustment
• Control Valve Body Cover Replacement
• Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement
• Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Removal
• Engine Will Not Crank - Crankshaft Will Not Rotate
• Engine Will Not Crank - Crankshaft Will Not Rotate
• Engine Will Not Crank - Crankshaft Will Not Rotate
• Fastener Tightening Specifications (LAT, LE5)
• Fastener Tightening Specifications (LE9)
• Fastener Tightening Specifications
• Fastener Tightening Specifications
• Engine Flywheel Replacement
• Generator Control Module Cover Replacement
• Power Window Reinitialization
• Air Cleaner Outlet Duct Replacement
• Lifting and Jacking the Vehicle
• Engine Control Module Replacement (LE5)
• Engine Control Module Replacement
• Engine Control Module Replacement
• Catalytic Converter Replacement - Left Side (LY7)
• DTC B1325
• Battery Common Causes of Malfunction
• Engine Cranks Slowly
• Battery Usage
• Fastener Tightening Specifications
• Generator Usage
• PNP Switch Circuit Malfunction - 4T45-E (ME7/MN5)
• PNP Switch Circuit Malfunction - 6T40/6T45 (MH8)
• PNP Switch Circuit Malfunction - 6T70 (MH2)
• Start Relay Circuit Malfunction