Battery, Charging System and Starting System Chevrolet Avalanche II

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Ignition OFF, disconnect the harness connectors at the appropriate module.
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 terminals listed below and ground. Terminal 5 (PPS) Terminal 13 (IPC) Terminal 8 X1 (amplifier, radio) Terminal 7 X2 (rear object) If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the appropriate B+ circuit terminals listed below and ground. Terminal 1 (IPC, PPS) Terminal 1 X1 (radio) Terminal 4 X1 (amplifier) Terminal 1 X2 (rear object) If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
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.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	B1424 00	B1424 00
Ground		B1424 00

The theft deterrent module (TDM) monitors the battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 volts, and the voltage being reported by a serial data message is greater than 9 volts, then DTC B1424 00 sets.

The ignition is ON.

Conditions for Setting the DTC

Voltage at the TDM B+ circuit is between 6-9 volts.
Reported battery voltage received via serial data is valid and is greater than 9 volts.
The above conditions have been met for 2 seconds.

The security indicator turns ON.
The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message.

A current DTC clears when the battery voltage at the TDM is greater than 9 volts, or if the voltage reported by serial data is less than 9 volts.
A history DTC clears after 100 consecutive ignition cycles, if no failures are reported by this diagnostic.

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

Schematic Reference

Immobilizer Schematics

Connector End View Reference

Description and Operation

«Immobilizer Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-description-and-operation)
«Charging System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Ignition OFF, disconnect the harness connector at the TDM. Refer to «Theft Deterrent Module Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#immobilizer-system) .
Ignition OFF and scan tool disconnected, open and close the drivers door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the TDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for TDM replacement, set up, and programming.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
BCM B+	B1516 08	B1516 08
5-Volt Reference	B1516 08	B1516 08
Signal	B1516 08	B1516 08	B1516 08	B1516 08, B1516 66
Low Reference		B1516 08

Typical Scan Tool Data

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Headlamps and all accessories Off. Parameter Normal Range: -5A to -25A
BCM B+	59.9A	59.9A
5-Volt Reference	59.9A	59.9A
Signal	59.9A	59.9A	59.9A
Low Reference		59.9A

Battery Current - BCM

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.60V
BCM B+	25.60V	26.10V

Battery Voltage - BCM

The battery current sensor is a 3-wire hall effect current sensor. The battery current sensor monitors the battery current. The signal circuit is an input to the body control module (BCM). The sensor creates a 5-volt pulse width modulation (PWM) signal of 128 Hz with a duty cycle of 0-100 percent. Normal duty cycle is between 4-96 percent. The signal circuit is an input to the body control module (BCM). If the duty cycle is outside of the normal range, DTC B1516 08 sets. The BCM also tests for correct polarity of the sensor. If the BCM detects positive current flow with the engine OFF, DTC B1516 66 sets.

B1516 08

The BCM is awake.

B1516 66

The BCM is awake.
The engine is OFF.
The hood and doors are closed.
DTC B1516 08 has run and passed during this ignition cycle.
DTC B1516 66 has not already run and passed during this ignition cycle.

The BCM detects the sensor signal duty cycle is less than 4 percent or greater than 96 percent for 2 minutes.

The BCM detects positive battery current when the engine is OFF.

Regulated voltage control (RVC) is disabled.

The DTC passes when the battery sensed current returns to the normal range for 15 seconds.
A history DTC will clear after 100 ignition cycles.

Schematic Reference

«Starting and Charging Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Body Control System Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#data-communication-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, headlamps and all accessories OFF, observe the scan tool BCM Battery Current parameter. The reading should be between -5 amps and -25 amps, and change with the amount of current draw on the battery.

Ignition ON, observe the scan tool BCM Battery Voltage parameter. The reading should be equal to B+ voltage. If not the specified value, test the following BCM circuits for an open/high resistance. If the circuits test normal, replace the BCM. B+ circuit terminal 3 X3 Ground circuit terminal 1 X3 Ground circuit terminal 5 X3 Ground circuit terminal 9 X4
Verify that the current sensor is mounted correctly on the negative battery cables. The sensor should be installed with the internal coil around the negative battery cables, with the tape tab pointing away from the battery. If the sensor is not installed correctly, remove and reinstall the sensor.
Ignition OFF, disconnect the harness connector at the battery current sensor.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
Ignition ON, test for 4.5-5.5 volts between the 5-volt reference circuit terminal A and ground. If not within 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.
Ignition ON, test for 4.5-5.5 volts between the signal circuit terminal C and ground. If not within 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 all circuits test normal, replace the battery current sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Current Sensor Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
BCM B+	B1516 08	B1516 08	B1517 5A
High Resolution B+	B1517 03, B1517 5A	B1517 03, B1517 5A	B1517 07
Ground		B1516 08, B1517 03, B1517 5A	B1517 07

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.60 Volts
BCM B+	26.00 Volts	26.00 Volts

Battery Voltage - BCM

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.600 Volts
High Resolution B+	0.000 Volts	0.000 Volts

Batt. Voltage High Res. - BCM

The body control module (BCM) has 2 circuits for monitoring vehicle system voltage. The BCM B+ is supplied to terminal 3 X3 by the BCM fuse, and the high resolution B+ is supplied to the BCM terminal 10 X4 by the IPC fuse. The BCM monitors the system voltage on both circuits 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 BCM detects the system voltage on the high resolution B+ circuit is outside the normal range, DTC B1517 will set.

The BCM is awake.

B1517 03

The voltage of the high resolution B+ circuit is less than 11 volts for 2 minutes.

B1517 07

The voltage of the high resolution B+ circuit is greater than 16 volts for 15 seconds..

B1517 5A

The voltage of the high resolution B+ circuit is 2 volts less than the voltage of the BCM B+ circuit for 10 seconds.

The instrument panel cluster (IPC) illuminates the charge indicator.
The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.

The DTC will pass when the battery voltage is in the normal range for 15 seconds.
The 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. Refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Verify that the ground connections G103 and G201 are clean and tight.

Schematic Reference

«Body Control System Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#data-communication-system)
«Power Distribution Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
«Ground Distribution Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool BCM Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60 and 15.00 volts.

Ignition OFF, disconnect the harness connectors at the BCM.
Ignition OFF and scan tool disconnected, open and close the drivers door, and wait 1 minute. Test for less than 5 ohms between the following ground circuit terminals and ground: Terminal 1 X3 Terminal 5 X3 Terminal 9 X4 If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the following B+ circuit terminals and ground: Terminal 3 X3 Terminal 10 X4 If the test lamp does not illuminate, test the appropriate B+ circuit for a short to ground or an open/high resistance.
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.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) monitors the state of charge (SOC) of the electrical system. If the BCM senses that the battery current was less than -2 amps and the SOC at key-on is 30 percent less than it was when the engine was last running, DTC B1527 00 will set.

The ignition is turned from OFF to ON.

The SOC at key-on is 30 percent less than it was when the engine was last running.
The average battery current was less than -2 amps when the ignition was OFF.

No actions are taken.

The DTC will clear when the SOC is greater than or equal to 80 percent.
A history DTC clears after 50 consecutive ignition cycles that the diagnostic runs and does not fail.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Refer to Battery Electrical Drain/Parasitic Load Test .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0895 00	C0895 00
Ground		C0895 00

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, Engine OFF. Parameter Normal Value: 12.6 Volts
B+	0.0 Volts*	0.0 Volts*	12.6 Volts
*The scan tool will not communicate with the ESC module if there is 0 Volts on the circuit.

Battery Voltage Signal - ESC Module

Voltage is supplied to the electronic suspension control (ESC) module by the battery positive (B+) voltage circuit. The ESC module monitors the supplied voltage to determine if it is within a valid operating range. Damage to components, and incorrect data may occur if the voltage is out of range. The ESC module disables all outputs, and sets DTC C0895 00, if high or low battery voltage is detected.

The ignition is ON.

Battery voltage is outside the normal range of 9.0-15.5 volts.

The ESC module disables all functionality.

A current DTC will clear when the ESC module receives battery voltage in the normal range of 9-15.5 volts.
A history DTC will clear if the condition does not return after 50 consecutive ignition cycles.

A high or low voltage value in multiple modules indicates a concern in the charging system.
Overcharging with a battery charger or jump starting can cause this DTC to set.
Inspect ground connection G400. Verify that it is clean and tight.

Schematic Reference

«Electronic Suspension Control Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
«Power Distribution Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
«Ground Distribution Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)

Connector End View Reference

Description and Operation

«Electronic Suspension Control Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
«Charging System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool ESC Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts.

Ignition OFF, disconnect the harness connector at the ESC module.
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 47 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminal 32 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the ESC module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ESC module replacement, setup and programming.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of this diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0899 00, C0899 03	C0899 00, C0899 03
Ground		C0899 00, C0899 03

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.6 Volts
B+	0.0 Volts	0.0 Volts	12.6 Volts

Battery Voltage Signal - EBCM

The electronic brake control module (EBCM) monitors the battery positive (B+) voltage level available for system operation. A low voltage condition prevents the system from operating properly.

The ignition is ON.

The ignition voltage available to the EBCM is less than 9 volts for 100 msec.

The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle
The vehicle dynamics caution (VDC) indicator turns ON.

The condition for the DTC is no longer present.
The EBCM automatically clears the 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»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-less-than-3900-kg-8600-lb-gvw) for less than 3900 kg (8600 lb) GVW
«Antilock Brake System Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-greater-thanequal-to-3900-kg-8600-lb-gvw) for greater than 3900 kg (8600 lb) GVW

Connector End View Reference

Description and Operation

«ABS Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-less-than-3900-kg-8600-lb-gvw__abs-description-and-operation) for less than 3900 kg (8600 lb) GVW
«ABS Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-greater-thanequal-to-3900-kg-8600-lb-gvw__abs-description-and-operation) for greater than 3900 kg (8600 lb) GVW

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 Volts.

Ignition OFF, disconnect the harness connector at the EBCM.
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 terminals listed below and ground. Terminal 11 (JL4) Terminal 38 (w/o JL4) If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1 (JL4) Terminal 25 (w/o JL4) If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
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.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance
B+	C0899 00, C0899 03*	C0899 00, C0899 03*
Ground		C0899 00, C0899 03*
* W/O JL4 ** JL4

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.6 Volts
B+	0.0 Volts*	0.0 Volts*	12.6 Volts
*The scan tool will not communicate with the EBCM if there is 0 Volts on the circuit.

Battery Voltage Signal - EBCM

The electronic brake control module (EBCM) monitors the battery positive (B+) voltage level available for system operation. A high or low voltage condition prevents the system from operating properly, and may cause damage to the system.

The ignition is ON.

The battery voltage is greater than 16 V for 100 msec.

The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle.
The antilock brake system (ABS) is disabled if voltage exceeds 19.5 V.
The EBCM requests the MIL to be turned ON.
The BRAKE indicator turns ON.
The antilock brake system (ABS) indicator turns ON if voltage exceeds 19.5 V.
The vehicle dynamics caution (VDC) indicator turns ON.
The driver information center (DIC) displays the SERVICE TRACTION CONTROL message.
The DIC displays the SERVICE STABILITRAK message.
The DIC displays the SERVICE BRAKES SOON message.

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

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

Schematic Reference

«Antilock Brake System Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-less-than-3900-kg-8600-lb-gvw) for less than 3900 kg (8600 lb) GVW
«Antilock Brake System Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-greater-thanequal-to-3900-kg-8600-lb-gvw) for greater than 3900 kg (8600 lb) GVW

Connector End View Reference

Description and Operation

«ABS Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-less-than-3900-kg-8600-lb-gvw__abs-description-and-operation) for less than 3900 kg (8600 lb) GVW
«ABS Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/anti-locktraction-control/#antilock-brake-system-non-hybrid-greater-thanequal-to-3900-kg-8600-lb-gvw__abs-description-and-operation) for greater than 3900 kg (8600 lb) GVW

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 Volts. If greater than 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.

Diagnostic Instructions (ECM)

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information (ECM)

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

Circuit/System Description (ECM)

The engine control module (ECM) monitors the battery positive (B+) 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 low battery voltage, then DTC P0562 will set.

Conditions for Running the DTC (ECM)

The engine is running.

Conditions for Setting the DTC (ECM)

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

Action Taken When the DTC Sets (ECM)

DTC P0562 is a type C DTC.

Conditions for Clearing the DTC (ECM)

DTC P0562 is a type C DTC.

Diagnostic Aids (ECM)

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

Reference Information (ECM)

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing (ECM)

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Ignition OFF, disconnect the harness connectors at the ECM.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms of resistance between the ground circuit terminal 73 X1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
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.
Install a 3A jumper wire between the PWR/TRN relay control circuit terminal 59 X1 and ground.
Ignition ON, verify that a test lamp illuminates between the ignition circuit terminals listed below and ground. Terminal 19 X1 Terminal 47 X1 If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the ECM.

Repair Procedures (ECM)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

Diagnostic Instructions (FPCM)

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information (FPCM)

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

Circuit/System Description (FPCM)

The fuel pump control module (FPCM) 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.

Conditions for Running the DTC (FPCM)

The engine is running.

Conditions for Setting the DTC (FPCM)

The FPCM detects that the battery voltage is less than 9 V.

Action Taken When the DTC Sets (FPCM)

DTC P0562 is a type C DTC.

Conditions for Clearing the DTC (FPCM)

DTC P0562 is a type C DTC.

Reference Information (FPCM)

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing (FPCM)

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Ignition OFF, disconnect the harness connectors at the FPCM.
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 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the B+ circuit terminal 32 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the FPCM.

Repair Procedures (FPCM)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

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.

The ignition is ON.

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

DTC P0563 is a type C DTC.

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

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification (ECM)

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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
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.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	P0562	P0562
Ground		P0562

The ignition is ON.

The FPCM detects that the system voltage is greater than 18 V.

DTC P0563 is a type C DTC.

Diagnostic Aids (FPCM)

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

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification (FPCM)

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V. If not within the specified range, refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
If all circuits test normal, replace the FPCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Control	P0615	P0615	P0615
Ground		P0615

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 sends a serial data message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the automatic transmission is in Park or Neutral, and that the immobilizer is not disabling engine starting. If conditions are acceptable for cranking, then the ECM supplies 12 V to the control circuit of the STRTR relay. When this occurs, battery voltage is supplied through the switch of the STRTR relay to terminal S X2 of the starter solenoid, and the engine cranks. The ECM monitors the voltage on the STRTR relay control circuit. If the ECM detects that the STRTR relay control circuit is open, shorted to ground, or shorted to voltage, then DTC P0615 sets.

The ignition is ON or in the start position.
The battery voltage is 9.5-18 V.

The ECM detects that the control circuit of the STRTR relay is open, shorted to ground, or shorted to voltage for 2 seconds.

DTC P0615 is a type C DTC.

The DTC passes when the ECM detects that the failure is no longer present for 2 seconds.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON. Verify that no immobilizer or automatic transmission DTCs are set that would cause the ECM to disable engine starting. If any DTCs are set that would cause the ECM to disable starting, then refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-trouble-code-dtc-list) .
Attempt to start the engine. The engine should crank.

Ignition OFF, disconnect the STRTR relay.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the relay ground circuit terminal 85 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85. Turn the ignition to the start position. The test lamp should turn ON for no longer than 10 seconds when the ignition is in the START position, and OFF in all other 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.
If all circuits test normal, test or replace the STRTR relay.

Component Testing

Relay Test

Ignition OFF, disconnect the STRTR relay.
Test for 60-180 ohms between terminals 85 and 86. If not within the specified range, replace the relay.
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.
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.

«Relay Replacement (Attached to Wire Harness)»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+	P0622	P0622
Field Duty Cycle Signal	P0622	P0622
Charge Indicator Signal	P0621		P0621

The engine control module (ECM) uses the charge indicator 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 charge indicator signal circuit.

The engine is running.
No generator, CKP sensors, CMP sensor DTCs are set.

The charge indicator signal circuit is shorted to ground or shorted to voltage for 20 seconds.

The charge indicator turns ON.
The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.

The DTC will pass when the condition for setting the DTC is no longer present for 2 seconds.
A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The charge indicator and DIC message will remain ON until the DTC passes or is cleared, even if the ignition is cycled.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the X1 harness connector at the generator.
Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Engine running, test for greater than 3.5 V between the signal circuit terminal 1 and ground. 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.
If all circuits test normal, test or replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+	P0622	P0622
Field Duty Cycle Signal	P0622	P0622
Charge Indicator Signal	P0621		P0621

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine running. Parameter Normal Range: 5-99%
B+	0%	0%
Field Duty Cycle Signal	0%	0%	99%

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 ignition is ON and the engine is OFF, the ECM should detect a duty cycle near 0 percent. When the engine is running, the duty cycle should be between 5-99 percent.

The ignition is ON.
The engine speed is less than 3000 RPM.
No generator, crankshaft, or camshaft position sensor DTCs are set.

One of the following conditions exist

The engine is OFF, and the GEN F-Terminal Signal is greater than 65 percent for 15 seconds.
The engine is running, and the GEN F-Terminal Signal is less than 5 percent for 30 seconds.

The charge indicator turns ON.
The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.

The DTC will pass when the condition for setting the DTC is no longer present.
A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The charge indicator and DIC message will remain ON until the DTC passes or is cleared, even if the ignition is cycled.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Generator L-Terminal Circuit	P1668	P1668	P1668

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.

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

The ECM will command the charge indicator to be illuminated on the instrument panel cluster (IPC).
The ECM will not illuminate the malfunction indicator lamp (MIL).
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

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Ignition OFF, disconnect the harness connector at the generator.
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.
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.
If the circuit tests normal, replace the generator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Generator Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/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

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) 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.
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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) «Charging System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) «Electrical Power Management Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) «Starting System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__starting-system-description-and-operation)

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Refer to «Checking Aftermarket Accessories»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
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

«Battery Inspection/Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Electrical Drain/Parasitic Load Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Common Causes of Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__battery-common-causes-of-malfunction)
«Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Generator Noise Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Solenoid Does Not Click»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Solenoid Clicks, Engine Does Not Crank»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Engine Cranks Slowly»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__engine-cranks-slowly)
«Starter Noise Diagnosis»(/chevrolet/avalanche/ii-2006-2013/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

If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/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.
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.
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.

WARNING

Refer to Battery Disconnect Warning .

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.
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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__battery-usage) . If the battery does not meet or exceed specifications, replace the battery.
Verify that the battery cables are clean and tight. The battery terminal bolts should be torqued as specified in «Fastener Tightening Specifications»(/chevrolet/avalanche/ii-2006-2013/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.
Install the J 42000 and follow directions supplied by the tester. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . If the tester calls for charging the battery, refer to «Battery Charging»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Positive Cable Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Negative Cable Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)

J 42000 Battery Tester. See Special Tools .

For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
The charging area should be well ventilated.
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/avalanche/ii-2006-2013/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

Be sure all electrical loads are turned OFF.
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.
Estimate the battery temperature by determining the average temperature to which the battery has been exposed for the past 12 hours.
Measure the battery voltage at the battery terminals. Refer to the following table to determine the SOC according to the estimated battery temperature

Battery Voltage	% Charge at 0°C (32°F)	% Charge at 25°C (75°F)
12.75 V	100%	100%
12.7 V	100%	90%
12.6 V	90%	75%
12.45 V	75%	65%
12.2 V	65%	45%
12.0 V	40%	20%

Use the SOC information as follows

A battery with a SOC that is below 65 percent must always be recharged before returning it to service or continuing storage.
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

The battery charger capacity-The higher the charger amperage, the less time it will take to charge the battery.
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.
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

WARNING

Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

CAUTION

Refer to Fastener Caution .

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: Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

Use the following procedure to charge the battery

Turn OFF the charger.
Ensure that all of the battery terminal connections are clean and tight.
Connect the charger positive lead to the battery positive terminal on the battery or the remote jumper stud underhood.
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.
Turn ON the charger and set to the highest setting for normal charging.
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.
After charging, test the battery. Refer to «Battery Inspection/Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .

J 38758 Parasitic Draw Test Switch. See Special Tools .

Be sure to rule out any possible obvious influences, such as customer error or aftermarket equipment. Anytime aftermarket accessories are installed into the courtesy lamp circuit, it 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.
Customer driving habits, such as regular short trips. This does not allow enough time to properly charge the battery. Refer to «Battery Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Verify that the battery and charging system are in proper working order. Refer to «Battery Charging»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) and «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
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.
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/avalanche/ii-2006-2013/remont/communication-devices/#data-communication-system__body-control-system-description-and-operation) for the system or modules description and operation.
Remote keyless entry (RKE) will wake up due to an outside input. Refer to «Keyless Entry System Description and Operation (Without Accessory 2 Way Remote)»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions__keyless-entry-system-description-and-operation) or «Keyless Entry System Description and Operation (With Accessory 2 Way Remote)»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions__keyless-entry-system-description-and-operation) for the system description and operation.
The battery run down time will vary depending on cold cranking amperage (CCA) and reserve capacity (RC). If the CCA and RC are higher, then the battery run down time would be longer. If the CCA and RC are lower, then the battery run down time would be shorter. The graph below indicates roughly how many days a 690 CCA battery with at 110 min. RC (60.5 AH) 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 rating and temperature will affect the results.

Current Drain	Days
25 mA	30.5
50 mA	16.5
75 mA	11
100 mA	8.25
250 mA	3.3
500 mA	1.65
750 mA	1
1 A	0.8
2 A	0.4

Load Test

WARNING

Refer to Battery Disconnect Warning .

CAUTION

Do not turn the parasitic draw test switch to the OFF position with the engine running. Damage will occur to the vehicle's electrical system.

CAUTION

The test switch must be in the ON position when removing the fuses in order to maintain continuity in the electrical system. This avoids damaging the digital multimeter due to accidental overloading, such as a door being opened to change a fuse.

Note. The switch knob on the J 38758 is marked ON and OFF. See Special Tools . When the switch knob is in the ON position, the circuit is closed and electrical current will pass through the switch. When the switch knob is in the OFF position, the circuit is open and electrical current will not pass through the switch.

Disconnect the battery negative cable from the battery negative terminal. Refer to «Battery Negative Cable Disconnection and Connection»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Install the male end of the J 38758 to the battery ground terminal. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Turn the J 38758 knob to the OFF position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Install the battery negative cable to the female end of the J 38758 . See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Turn the J 38758 knob to the ON position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Road test the vehicle and activate ALL of the accessories, including the radio and air conditioning. This may take up to 30 minutes.
Park the vehicle. Turn the ignition switch to the OFF position and remove the ignition switch key.
Connect a 10A fused jumper wire to the test switch tool terminals.
Turn the J 38758 knob to the OFF position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . The current now flows through the jumper wire.
Wait 1 minute. If the fuse blows, install an inductive ammeter and go to step 19.
Remove the fused jumper wire.
Set a digital multimeter to the 10A scale.
Connect the digital multimeter to the test switch tool terminals.
Turn the J 38758 knob to the OFF position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . The current flows now through the digital multimeter.
Wait 1 minute. Check and record the current reading. When there is a current reading of 2A or less, turn the J 38758 knob to the ON position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . The electrical current will now pass through the switch. Then switch the digital multimeter down to the 2A scale for a more accurate reading when the J 38758 knob is turned OFF. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Turn the J 38758 knob to the OFF position. See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . Wait 15 minutes for most vehicles.
Check and record the current reading.
Note the battery reserve capacity, amp hour rating. Refer to «Battery Usage»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__battery-usage) . Divide the reserve capacity by 4, amp hour rating by 2.4. Compare this to the multimeter milliampere reading taken in the previous step. The parasitic current drain should not exceed this number. Example: If a battery has a reserve capacity of 100 minutes, (60 A/H) the current drain should not exceed 25 mA.
If excessive current drain is not found at this time and there are no other apparent causes, complete the following: Using the MIN/MAX function of the digital multimeter, monitor the parasitic drain overnight or during the day. This will determine if something has been activated during that time frame. CAUTION: The test switch must be in the ON position when removing the fuses in order to maintain continuity in the electrical system. This avoids damaging the digital multimeter due to accidental overloading, such as a door being opened to change a fuse. NOTE: Removing fuses, relays, and connectors to determine the failure area may wake up modules. You must wait for these modules to go to sleep or use the sleep function on the scan tool. When the vehicle has an unacceptable amount of parasitic current drain, remove each fuse one at a time until the current drain falls to an acceptable level. This will indicate which circuit is causing the drain. Refer to «Power Distribution Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction) to diagnose exactly which part of the suspect circuit is causing the parasitic drain. In some cases a non-fused circuit or component, such as a relay, is the cause of excessive parasitic current drain. Repeat the parasitic current drain test procedure after any repair has been completed to make sure that the parasitic current drain is at an acceptable level. When the cause of the excessive current drain has been located and repaired, remove the J 38758 . See «Special Tools»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Connect the battery negative cable to the battery negative terminal.

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

A vehicle accessory was left on overnight.
The driving speeds have been slow with frequent stops with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
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/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis) .

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. As long as the green eye is visible in the hydrometer, 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 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 a battery state of charge while storing the vehicle for more than 30 days, disconnect the battery ground to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

Maintain a high state of charge.
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.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Engine ON, 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.

If the charge indicator is not on the IPC and a charging system message is not displayed on the DIC, refer to «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) .
If the charge indicator is ON on the IPC or a charging system message is displayed on the DIC, refer to Circuit/System Testing.

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/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-trouble-code-dtc-list) .
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/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Connect a carbon pile tester to the battery.
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.
Adjust the carbon pile tester to the specified load test output value, refer to «Generator Usage»(/chevrolet/avalanche/ii-2006-2013/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

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__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.

Start the engine. Verify the noise can be heard. Compare the concern to a similar vehicle.
Perform a charging system test. Verify that the generator is charging properly. Refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
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.
Ignition OFF, remove the engine drive belts. Refer to «Drive Belt Replacement - Accessory»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-2-of-5) and «Air Conditioning Compressor Belt Replacement (V8)»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-2-of-5) .
Verify the generator, A/C compressor, water pump pulley, power steering pump, idler pulley, and tensioner pulleys spin freely. If any of the pulleys do not spin freely, replace the affected component.
Start the engine, with the drive belts removed. Verify that the noise goes away. Operate the engine for no longer than 30 seconds. If the noise is still present, the generator is not the cause of the noise.
Loosen all generator mounting bolts and ensure the generator is properly aligned. Tighten the mounting bolts to specification, refer to «Generator Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Generator Replacement

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Underhood Fuse Block B+	1	1
STRTR Fuse 60 or 64		1
Park Neutral Signal	2	1	1
Starter Relay Coil Control	1	1	3
Starter Solenoid Crank Voltage	1	1	3
Underhood Fuse Block Ground		1
No crank Cranks in any gear Cranks all the time

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 STRTR 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 S X2 and engaging the starter solenoid.

A misadjusted PNP switch (M30, M70) or shift control/range selector lever cable may result in a starter solenoid does not click condition.

Schematic Reference

«Starting and Charging Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Automatic Transmission Controls Schematics»(ref-339161-S02857727752009090300000) for the 4L60E (M30) and 4L70E (M70) transmissions
«Automatic Transmission Controls Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/automatic-trans/#automatic-transmission-6l80-introduction) for the 6L80E (MYC) and 6L90E (MYD) transmissions
«Starting and Charging Schematics»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool ECM PNP Switch parameter while shifting the transmission through each range. The reading should change between Park/Neutral and In Gear. If not the specified value, refer to PNP Switch Malfunction.
Command the Starter Relay ON with the scan tool, or turn the ignition switch to the START position. The starter solenoid should click and the engine should crank. If the solenoid does not click, refer to STRTR Relay Malfunction. If the solenoid clicks but the engine does not crank, refer to «Starter Solenoid Clicks, Engine Does Not Crank»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .

PNP Switch Malfunction (M30 4L60E, M70 4L70E)

Inspect the range selector lever cable for proper adjustment. Refer to «Range Selector Lever Cable Adjustment»(ref-339163-S17809150292009090300000) .
Inspect the park/neutral position switch for proper adjustment. Refer to «Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement»(ref-339163-S04269997382009090300000) .
Ignition OFF. Disconnect the harness connector from the park/neutral switch.
Ignition OFF, test for less than 5 ohms between the ground circuit terminal 7 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that the scan tool PNP Switch parameter is In Gear. If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the ECM.
Install a 3 A fused jumper wire between the ground circuit terminal 7 and the signal circuit terminal 3. Verify that the scan tool PNP Switch parameter is Park/Neutral. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
If all circuits test normal, test or replace the park/neutral position switch.

PNP Switch Malfunction (MYC 6L80E, MYD 6L90E)

Inspect the range selector lever cable for proper adjustment. Refer to «Range Selector Lever Cable Adjustment»(ref-339163-S17809150292009090300000) .
Ignition OFF. Disconnect the 16-way harness connector from the transmission.
Ignition ON. Measure voltage on the park/neutral signal circuit terminal 3 with a DMM. Verify that there is greater than 10 V on the park/neutral signal circuit. If there is less than 10 V on the park/neutral signal circuit, test the circuit for an open or a short to ground. If OK, replace the ECM.
Ignition OFF, reconnect the 16-way harness connector to the transmission.
Remove the automatic transmission fluid pan. Refer to «Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
Disconnect the manual shift shaft position switch connector at the control solenoid valve assembly. Refer to «Manual Shift Shaft Position Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
Ignition ON, verify that the scan tool PNP Switch parameter displays In Gear. If not the specified value, replace the ECM.
Connect a 3 A 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 display Park/Neutral when the terminal is connected to ground. If not the specified value, replace the ECM.
If all components test normal, test or replace the manual shift shaft position switch.

STRTR Relay Malfunction

Ignition OFF, disconnect the STRTR relay.
Ignition ON, transmission in Park/Neutral. Verify that a test lamp illuminates between the relay coil ground circuit terminal and B+. If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
Probe the STRTR Relay switch B+ circuit terminal with a test lamp that is connected to ground. Verify that the test lamp illuminates. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the STRTR fuse is open, test the relay controlled output circuit for a short to ground.
Connect a test lamp between the relay coil ground circuit terminal and the relay coil control circuit terminal.
Ignition ON, transmission in Park/Neutral. Command the Starter Relay ON and OFF with a scan tool, or 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 and open/high resistance. If the circuit tests normal, replace the ECM.
Connect the START relay.
Install a test lamp between the starter terminal S X2 and ground.
Ignition ON, transmission in Park/Neutral, command the Starter Relay ON with a scan tool, or turn the ignition switch to the START position. The test lamp should illuminate. If the test lamp does not illuminate, test the relay controlled output circuit for an open/high resistance. If the circuit tests normal, test or replace the STRTR relay.
If all circuits test normal, test or replace the starter.

PNP Switch Test (M30 4L60E, M70 4L70E)

Ignition OFF, disconnect the harness connector at the PNP switch.
With the PNP switch in the following positions, test for infinite resistance between the ground terminal 7 and the signal terminal 3. R OD D 2 1 If not the specified value, replace the PNP switch.
With the PNP switch in the following positions, test for less than 2 ohms between the ground terminal 7 and the signal terminal 3. P N If greater than the specified range, replace the PNP switch.

Relay Test

Ignition OFF, disconnect the STRTR relay.
Test for 60-180 ohms between terminals 85 and 86. If not within the specified range, replace the relay.
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.
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.

«Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement»(ref-339163-S04269997382009090300000) for the 4L60E (M30) and 4L70E (M70) transmissions
«Control Valve Body Assembly Removal»(/chevrolet/avalanche/ii-2006-2013/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for shift shaft position switch replacement (MYC 6L80E, MYD 6L90E)
«Control Valve Body Assembly Disassemble»(/chevrolet/avalanche/ii-2006-2013/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for shift shaft position switch replacement (MYC 6L80E, MYD 6L90E)
«Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup and programming.

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__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 STRTR relay. When this occurs, battery voltage is supplied through the STRTR relay to the X2-S terminal of the starter solenoid. The starter solenoid energizes, and supplies battery voltage to the starter from the X1-B terminal to crank the engine.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
«Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

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

If the starter solenoid does not click, refer to «Starter Solenoid Does Not Click»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .

If the engine cranks slowly, refer to «Engine Cranks Slowly»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__engine-cranks-slowly) .

Verify that the battery is sufficiently charged and that the battery cables are clean and tight. Refer to «Charging System Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . If the battery is not sufficiently charged, refer to «Battery Charging»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) . If the battery cables are not clean and tight, refer to «Fastener Tightening Specifications»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system__fastener-tightening-specifications) .
Using a DMM, measure voltage between the positive battery terminal and X1 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 positive battery cable.
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 negative battery cable.
Remove the drive belts. Refer to «Drive Belt Replacement - Accessory»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-2-of-5) and «Air Conditioning Compressor Belt Replacement (V8)»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-2-of-5) .
Attempt to start the engine, with the drive belts removed. If the engine cranks, inspect the engine accessories and belt drive system for mechanical binding.
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 «Engine Will Not Crank - Crankshaft Will Not Rotate»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-1-of-5__engine-will-not-crank-crankshaft) .
If all circuits test normal, replace the starter motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Battery Charging»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Positive Cable Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Battery Negative Cable Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)
«Starter Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system)

Engine Cranks Slowly

Perform the following checks

Battery-Battery Inspection/Test. Refer to «Battery Inspection/Test»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
Wiring-Inspect the wiring for damage. Inspect all connections to the starter motor, solenoid, battery, and all ground connections. Refer to «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing) , «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs) , «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor) and «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs) .
Engine-Make sure the engine is not seized. Refer to «Symptoms - Engine Mechanical»(/chevrolet/avalanche/ii-2006-2013/remont/mechanical/#engine-mechanical-48l-53l-60l-or-62l-1-of-5) .

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 .

Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__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