Battery, Charging System and Starting System Cadillac SRX I

Fastener Tightening Specifications

Fastener Tightening Specifications

Battery Usage

Battery Usage

Generator Usage

Generator Usage

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Engine Electrical Connector End Views

Generator Connector Part Information 1928403137 2-Way F Bosch (BK) Pin Wire Color Circuit No. Function 1 OG 225 Generator Turn On Signal 2 GY 23 Generator Field Duty Cycle Signal

Starter (LY7) Connector Part Information 12089916 1-Way F Metri-Pack 280 Series Sealed (GY) Pin Wire Color Circuit No. Function A PU 6 Starter Solenoid Crank Voltage

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Engine Electrical

Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Scan Tool Output Controls

Scan Tool Data List

Amplifier (AMP)

Dash Integration Module (DIM)

Digital Radio Receiver (DRR)

Drivers Door Switch

Drivers Door Module

Engine Control Module (ECM)

Instrument Panel Cluster (IPC)

Left Rear Door Module

Memory Seat Module (MSM)

Right Rear Door Module

Rear Integration Module (RIM)

Rear Seat Module

Vehicle Theft Deterrent (VTD)

Passenger Door Module

Sensing Diagnostic Module (SDM)

Transmission Control Module (TCM)

Circuit Description

The dash integration module (DIM) has an internal voltage sensor with a dedicated circuit that checks the battery positive voltage and battery negative circuit voltage to determine if it is between 9.0-15.9 volts.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B1327 Device Power Circuit Low

Conditions for Running the DTC

This DTC shall run only if the DIM has power, ground and the ignition is not in START mode. This DTC shall execute regardless of the battery voltage, except when the DTC B1390 is set current.

Conditions for Setting the DTC

1. This DTC shall be set as current when the voltage falls below 9.0 volts for 1,200 milliseconds.
2. When the vehicle exits START the DIM shall delay checking the voltage for 2 seconds.

Action Taken When the DTC Sets

A message shall be sent out on the class 2 lines to notify all other modules of low battery voltage.

Conditions for Clearing the MIL/DTC

In order to clear the DTC from a current status the voltage shall be greater than 9.54 volts for 1,200 milliseconds.

DTC B1327

The dash integration module (DIM) has an internal voltage sensor with a dedicated circuit that checks the battery positive voltage and battery negative circuit voltage to determine if it is between 9-15.9 volts.

This diagnostic procedure supports the following DTC

DTC B1328 Device Power Circuit High

This DTC shall run only if the DIM has power, ground and the ignition is not in START mode. This DTC shall execute regardless of the battery voltage, except when the DTC B1390 is set current.

This DTC shall be set as current when the voltage is greater than 15.5 volts for 1,200 milliseconds.

A message shall be sent out on the class 2 lines to notify all other modules of high battery voltage.

In order to clear the DTC from a current status the voltage shall be less than 16 volts for 1,200 milliseconds.

Diagnostic Aids

DTC B1328 may set if the vehicle is connected to a battery charger on fast or boost charge.

DTC B1328

The voltage level is monitored by the dash integration module (DIM) and is sent as a class 2 data message to the instrument panel cluster (IPC). If the DIM loses power the IPC will default to the last voltage level.

This diagnostic procedure supports the following DTC

DTC B1513 Charging System Volts Low

1. The key is in the ON position.
2. The engine is running.
3. DTC B1327 is not current.

This DTC will be set as current when the voltage falls below 10.5 volts for 30 seconds and the engine is running.

The charging system indicator message will be set in the driver information center (DIC) W/U50 only.

The DTC clears as a current status when the voltage is greater than 10.5 volts for 30 seconds with the engine running.

DTC B1513

The voltage level is monitored by the dash integration module (DIM) and is sent as a class 2 data message to the instrument panel cluster (IPC). If the DIM loses power the IPC will default to the last voltage level.

This diagnostic procedure supports the following DTC

DTC B1514 Charging System Volts High

1. The key is in the ON position.
2. The engine is running.

This DTC will be set as current when the voltage is greater than 16.2 volts for 30 seconds with the engine running.

The charging system telltale and driver warning message will be set in the driver information center (DIC).

The DTC clears as a current status when the voltage falls below 16.2 volts for 30 seconds with the engine running.

DTC B1514

The engine control module (ECM) monitors the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect data input can occur when the voltage is out of range. The ECM monitors the system voltage over an extended length of time. If the ECM detects a system voltage outside an expected range for the calibrated length of time, DTC P0560 will set.

This diagnostic procedure supports the following DTC

DTC P0560 System Voltage

1. System voltage is below 9 volts or above 16 volts.
2. Engine speed is above 650 RPM.

The ECM detects a system voltage out of range for 30 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will command a message to be displayed.
3. The ECM will store conditions which were present when the DTC set as Failure Records data only.

Conditions for Clearing the DTC

1. The ECM will command the message OFF after one trip in which the diagnostic test has been run and passed.
2. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
3. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0560

The engine control module (ECM) checks the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect input can occur when the voltage is out of range. The ECM monitors the system voltage over an extended length of time. If the ECM detects an excessively low system voltage, DTC P0562 will set.

This diagnostic procedure supports the following DTC

DTC P0562 System Voltage Low

1. Engine speed above 1,500 RPM
2. System voltage between 9.5-18 volts

The ECM detects a system voltage below 10 volts for 5 seconds.

1. The ECM will command a message to be displayed.
2. The ECM will not illuminate the malfunction indicator lamp (MIL).
3. The ECM will store conditions which were present when the DTC set as Fail Records data only.

1. The ECM will command the message OFF after one trip in which the diagnostic test has been run and passed.
2. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
3. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0562

The engine control module (ECM) checks the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect input can occur when the voltage is out of range. The ECM monitors the system voltage over an extended length of time. If the ECM detects an excessively high system voltage, DTC P0563 will set.

This diagnostic procedure supports the following DTC

DTC P0563 System Voltage High

1. Engine speed above 1,500 RPM
2. System voltage between 9.5-18 volts

The ECM detects a system voltage above 16 volts for less than 1 second.

1. The ECM will command a message to be displayed.
2. The ECM will not illuminate the malfunction indicator lamp (MIL).
3. The ECM will store conditions which were present when the DTC set as Fail Records data only.

1. The ECM will command the message OFF after one trip in which the diagnostic test has been run and passed.
2. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
3. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0563

The engine control module (ECM) supplies a ground path for the starter relay when start enable has been requested. The ECM monitors this circuit for conditions that are incorrect for the commanded state. If the ECM detects an improper circuit condition, starter relay DTC P0615 will set.

This diagnostic procedure supports the following DTC

DTC P0615 Starter Relay Control Circuit

System voltage is between 9 and 16 volts.

1. The ECM detects an improper voltage level on the control circuit that controls the starter relay.
2. The condition exists for at least 2 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.

1. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

Ignition system DTCs set with the ignition switch in the START position if the starter relay or the starter is inoperative. When the ECM enables starter operation, the ECM also initiates the diagnostic test routines for DTCs P0335, P0340, and P0385. If a condition exists which prevents the engine from cranking, the ECM will not receive signal input from the CKP and CMP sensors, and the DTCs will set.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may assist in diagnosing the condition. The information may help determine how often the condition that set the DTC occurs.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Listen for an audible click when the Starter relay operates. Turn the ignition switch back and forth from the ON to START positions. Repeat this as necessary.
2. 3: Tests for voltage at the coil side of the Starter relay. The STARTER RLY fuse supplies power to the coil side of the Starter relay.
3. 4: Verifies that the ECM is providing ground to the Starter relay.
4. 5: Tests if ground is constantly being applied to the Starter relay.

DTC P0615

The engine control module (ECM) supplies a ground path for the starter relay when start enable has been requested. The ECM monitors this circuit for conditions that are incorrect for the commanded state. If the ECM detects an improper circuit condition, starter relay DTC P0616 will set.

This diagnostic procedure supports the following DTC

DTC P0616 Starter Relay Control Circuit Low Voltage

1. System voltage is between 8-16 volts.
2. The engine is running.

1. The ECM detects an improper voltage level on the output circuit that controls the starter relay.
2. The condition exists for at least 2 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.

1. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0616

The engine control module (ECM) supplies a ground path for the starter relay when start enable has been requested. The ECM monitors this circuit for conditions that are incorrect for the commanded state. If the ECM detects an improper circuit condition, starter relay DTC P0617 will set.

This diagnostic procedure supports the following DTC

DTC P0617 Starter Relay Control Circuit High Voltage

1. System voltage is between 8-16 volts.
2. The engine is running.

1. The ECM detects an improper voltage level on the output circuit that controls the starter relay.
2. The condition exists for at least 2 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.

1. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0617

The engine control module (ECM) uses the generator field duty cycle signal circuit to monitor the duty cycle of the generator and fault indication. The generator field duty cycle signal circuit connects to the high side of the field winding in the generator. A pulse width modulated (PWM) high side driver in the voltage regulator turns the field winding 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 state of the generator field duty cycle signal circuit. When the engine is running, the ECM should detect a duty cycle that varies up to 100 percent. The ECM monitors the PWM signal using a key ON test and a RUN test. During the tests, if the ECM detects an out of range PWM signal, a DTC will set. When the DTC sets, the ECM will send a class 2 serial data message to the instrument panel cluster (IPC) and driver information center (DIC) to illuminate the charge indicator or display a charging message.

This diagnostic procedure supports the following DTC

DTC P0625 Generator F-Terminal Circuit Low Voltage

1. No generator, crankshaft position (CKP) sensors, or camshaft position (CMP) sensor DTCs are set.
2. The engine is less than 3,000 RPM.
3. The generator has not been commanded OFF by the ECM or scan tool.

The ECM detects a PWM signal less than 5 percent for at least 15 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.
3. The ECM will send a class 2 serial data message to the IPC and DIC to illuminate the charge indicator or display a charging message.

1. The conditions for setting DTC P0625 are not present.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0625

The engine control module (ECM) uses the generator field duty cycle signal circuit to monitor the duty cycle of the generator and fault indication. The generator field duty cycle signal circuit connects to the high side of the field winding in the generator. A pulse width modulated (PWM) high side driver in the voltage regulator turns the field winding 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 state of the generator field duty cycle signal circuit. When the key in the ON position, with the engine OFF, the ECM should detect a duty cycle that is 0 percent.

The ECM monitors the PWM signal using a key ON test and a RUN test. During the tests, if the ECM detects an out of range PWM signal, a DTC will set.

This diagnostic procedure supports the following DTC

DTC P0626 Generator F-Terminal Circuit High Voltage

1. No generator, crankshaft position (CKP) sensors, or camshaft position (CMP) sensor DTCs are set.
2. The engine is not running.
3. The key is in the ON position.

The ECM detects a PWM signal greater than 5 percent for at least 15 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.
3. The ECM will send a class 2 serial data message to the instrument panel cluster (IPC) and driver information center (DIC) to illuminate the charge indicator or display a charging message.

1. The conditions for setting DTC P0626 are not present.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P0626

The engine control module (ECM) uses the generator turn-on signal circuit to control the voltage output of the generator. When a different voltage is desired, the ECM will change the pulse width modulation (PWM) signal to the voltage regulator via the generator turn-on signal circuit. This causes the voltage regulator to the voltage output of the generator. The ECM has fault detection circuitry which monitors the state of the generator turn-on signal circuit. If the fault detection circuit senses a voltage other than what is expected, this DTC will set. The voltage regulator also contains fault detection circuitry. If the regulator detects a problem, the regulator will ground the generator turn-on signal circuit, pulling the voltage low. This also causes the ECM to set the DTC.

This diagnostic procedure supports the following DTC

DTC P1668 Generator L-Terminal Control Circuit

Key ON Test

1. The key is in the ON position for 5 seconds.
2. The engine is OFF.

Engine Run Test

1. The engine is running.
2. The engine speed is less than 3,000 RPM.

Key ON Test

1. The ECM detects a high signal voltage on the generator turn on signal circuit for at least 5 seconds.
2. The engine must be started.

During the RUN test, the ECM detects a low signal voltage on the generator turn on signal circuit for at least 5 seconds.

1. The ECM sends a class 2 message to the instrument panel cluster (IPC) to illuminate the charge indicator and/or turn on a message.
2. The ECM will not illuminate the malfunction indicator lamp (MIL).
3. The ECM will store the conditions present when the DTC set as Fail Records data only.

1. The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P1668

The engine control module (ECM) uses the generator turn on signal 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. When the ECM turns ON the high side driver, the voltage regulator turns ON the field circuit. When the ECM turns OFF the high side driver, the voltage regulator turns OFF the field circuit.

The ECM monitors the state of the generator turn on signal circuit. With the engine running, the ECM should detect a high generator turn on signal circuit.

This diagnostic procedure supports the following DTC

DTC P2500 Generator L-Terminal Circuit Low Voltage

1. No generator, crankshaft position (CKP) sensors, or camshaft position (CMP) sensor DTCs are set.
2. The engine is running.
3. The generator has not been commanded OFF by the ECM or scan tool.

The ECM detects a low signal voltage on the generator turn on signal circuit for at least 15 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.
3. The ECM will send a class 2 serial data message to the instrument panel cluster (IPC) and driver information center (DIC) to illuminate the charge indicator or display a charging message.

1. The Conditions for Setting DTC P2500 are not present.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P2500

The engine control module (ECM) uses the generator turn on signal 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. When the ECM turns ON the high side driver, the voltage regulator turns ON the field circuit. When the ECM turns OFF the high side driver, the voltage regulator turns OFF the field circuit.

The ECM monitors the state of the generator turn on signal circuit. The ECM should detect a low generator turn on signal circuit voltage when the key is ON and the engine is OFF, or when the charging system malfunctions. If the ECM detects a high generator turn on signal circuit voltage, DTC P2501 will set.

This diagnostic procedure supports the following DTC

DTC P2501 Generator L-Terminal Circuit High Voltage

1. No generator, crankshaft position (CKP) sensors, or camshaft positions (CMP) sensor DTCs are set.
2. The ignition is in the ON position.
3. The engine is not running.

The ECM detects a high signal voltage on the generator turn on signal circuit for at least 5 seconds.

1. The ECM will not illuminate the malfunction indicator lamp (MIL).
2. The ECM will store the conditions present when the DTC set as Fail Records data only.
3. The ECM will send a class 2 serial data message to the instrument panel cluster (IPC) and driver information center (DIC) to illuminate the charge indicator or display a charging message.

1. The Conditions for Setting DTC P2501 are not present.
2. The DTC can be cleared by using the scan tool Clear DTC Information function.

DTC P2501

Symptoms - Engine Electrical

1. Perform «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system descriptions and operations in order to familiarize yourself with the system functions. Refer to one of the following system operations: «Battery Description and Operation»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) «Starting System Description and Operation»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__starting-system-description-and-operation) «Charging System Description and Operation»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Refer to «Checking Aftermarket Accessories»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

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

1. «Battery Inspection/Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)
2. «Battery Electrical Drain/Parasitic Load Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)
3. «Battery Common Causes of Failure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__battery-common-causes-of-failure)
4. «Charging System Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__charging-system-test)
5. «Charge Indicator Always On»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)
6. «Charge Indicator Inoperative»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__charge-indicator-inoperative)
7. «Generator Noise Diagnosis»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)
8. «Starter Solenoid Does Not Click»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__starter-solenoid-does-not-click)
9. «Starter Solenoid Clicks, Engine Does Not Crank»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__starter-solenoid-clicks-engine-does-not)
10. «Engine Cranks Slowly»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__engine-cranks-slowly)
11. «Starter Motor Noise Diagnosis»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system)

Tools Required

J 42000 Battery Tester. See Special Tools .

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

1. If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal bolt. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . This may cut through any coating or through any oxidation that may be present on the bolt. Even new bolts contain a protective coating that may insulate or cause a resistance in the test circuit.
2. If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the test adapters on the terminals. Follow the instructions for an Out-of-Vehicle test.
3. If the tester displays a REPLACE BATTERY or BAD CELL-REPLACE 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. Install the tester adapters. Follow the instructions for an Out-of-Vehicle test. Replace the battery only if the Out-of-Vehicle test shows a REPLACE BATTERY or BAD CELL-REPLACE result. This prevents battery replacements that are due only to faulty battery cable connections.
4. Use the correct terminal adapters. Do not use any common bolts or a combination of bolts, nuts, and or washers as adapters when testing the battery. Use the test adapters that are provided with the J 42000 or P/N 12303040 terminal adapters. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . If the adapters that are provided with the J 42000 require replacement, use P/N 12303040. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . Any other adapter may not contact the correct areas of the battery terminal, causing a resistance that may result in an invalid battery test result.

Battery Inspection/Test

J 42000 Battery Tester. See Special Tools .

1. For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
2. The charging area should be well ventilated.
3. Do not charge a battery that appears to be frozen. Allow the battery to warm to room temperature and test it using the J 42000 before charging. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .

Battery State of Charge

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

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

Battery Charging

Use the SOC information as follows

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

Charging Time Required

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

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

Charging Procedure

Note. Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the PCM or other electronic components.

Note. Refer to Fastener Notice in Cautions and Notices.

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

1. Turn OFF the charger.
2. Ensure that all of the battery terminal connections are clean and tight.
3. Connect the charger positive lead to the battery positive terminal on the battery or the remote jumper stud underhood.
4. Connect the negative charger lead to a solid engine ground or to a ground stud in the engine compartment that is connected directly to the battery negative terminal, but away from the battery. If the negative battery cable is disconnected and a terminal adapter is being used, connect directly to the adapter.
5. Turn ON the charger and set to the highest setting for normal charging.
6. Inspect the battery every half hour after starting the battery charger. Charge the battery until the taper-rate charger indicates that the battery is fully charged. Estimate the battery temperature by feeling the side of the battery. If it feels hot to the touch or its temperature is over 45°C (125°F), discontinue charging and allow the battery to cool before resuming charging.
7. After charging, test the battery. Refer to «Battery Inspection/Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

J 38758 Parasitic Draw Test Switch. See Special Tools .

1. Be sure to rule out any possible obvious influences, such as customer error or aftermarket equipment.
2. 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»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Verify that the battery and charging system are in proper working order. Refer to «Battery Charging»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) and «Charging System Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__charging-system-test) .
4. A battery discharging for no apparent reason while the vehicle is parked can be caused by an intermittent draw, such as a module waking up, or a continuous draw, such as a dome light or stuck relay.
5. Some systems and modules such as OnStar®, and regulated voltage control (RVC), if equipped, are designed to wake-up, perform a task, and go back asleep at regular intervals. Refer to «Body Control System Description and Operation»(/cadillac/srx/i-2003-2009/remont/communication-devices/#computerintegrating-systems__body-control-system-description-and-operation) in Computer/Intergrating Systems for the system or modules description and operation.
6. Remote keyless entry (RKE) will wake up due to an outside input. Refer to «Keyless Entry System Description and Operation»(/cadillac/srx/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system) in Keyless Entry.
7. 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.

Battery Electrical Drain/Parasitic Load Test

Note. 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.

Note. 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.

1. Disconnect the battery negative cable from the battery negative terminal.
2. Install the male end of the J 38758 to the battery ground terminal. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
3. Turn the J 38758 knob to the OFF position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
4. Install the battery negative cable to the female end of the J 38758 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
5. Turn the J 38758 knob to the ON position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
6. Road test the vehicle and activate ALL of the accessories, including the radio and air conditioning. This may take up to 30 minutes.
7. Park the vehicle. Turn the ignition switch to the OFF position and remove the ignition switch key.
8. Connect a 10A fused jumper wire to the test switch tool terminals.
9. Turn the J 38758 knob to the OFF position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . The current now flows through the jumper wire.
10. Wait 1 minute. If the fuse blows, install an inductive ammeter and go to step 20.
11. Remove the fused jumper wire.
12. Set a digital multimeter to the 10A scale.
13. Connect the digital multimeter to the test switch tool terminals.
14. Turn the J 38758 knob to the OFF position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . The current flows now through the digital multimeter.
15. Wait 1 minute. Check and record the current reading. When there is a current reading on 2A or less, turn the J 38758 knob to the ON position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . 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»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
16. Turn the J 38758 knob to the OFF position. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) . Wait 15 minutes for most vehicles.
17. Check and record the current reading.
18. Note the battery reserve capacity, amp hour rating. Refer to «Battery Usage»(/cadillac/srx/i-2003-2009/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.
19. If excessive current drain is not found at this time and there are no other apparent causes, complete the following
20. 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.
21. 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»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing) in Wiring Systems 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.
22. 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.
23. When the cause of the excessive current drain has been located and repaired, remove the J 38758 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system__special-tools) .
24. Connect the battery negative cable to the battery negative terminal.

Battery Common Causes of Failure

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

1. A vehicle accessory was left on overnight.
2. The driving speeds have been slow with frequent stops, stop-and-go driving, with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
3. The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
4. Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
5. The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
6. There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to «General Electrical Diagnosis Procedures»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing) in Wiring Systems.

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

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

1. Ensure that the green dot is visible in the built-in hydrometer.
2. Disconnect the battery ground cable to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

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

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

Jump Starting in Case of Emergency

Note. This vehicle has a 12 volt, negative ground electrical system. Make sure the vehicle or equipment being used to jump start the engine is also 12 volt, negative ground. Use of any other type of system will damage the vehicle's electrical components.

1. Position the vehicle with the booster battery so that the jumper cables will reach. Do not let the 2 vehicles touch. Make sure that the jumper cables do not have loose ends, or missing insulation.
2. Place an automatic transmission in PARK. If equipped with a manual transmission, place in NEUTRAL and block the wheels.
3. Turn OFF all electrical loads on both vehicles that are not needed.
4. Turn OFF the ignition on both vehicles.
5. Connect the red positive (+) cable to the battery positive (+) terminal (2) of the vehicle with the discharged battery. Use a remote positive (+) terminal if the vehicle has one.
6. Connect the red positive (+) cable to the positive (+) terminal (1) of the booster battery. Use a remote positive (+) terminal if the vehicle has one.
7. Connect the black negative (-) cable to the negative (-) terminal (3) of the booster battery.
8. The final connection is made to a heavy, unpainted metal engine part (4) of the vehicle with the discharged battery. This final attachment must be at least 46 cm (18 in) away from the dead battery.
9. Start the engine of the vehicle that is providing the boost.
10. Crank the engine of the vehicle with the discharged battery.
11. The black negative (-) cable must be first disconnected from the vehicle that was boosted (4).
12. Disconnect the black negative (-) cable from the negative (-) terminal (3) of the booster battery.
13. Disconnect the red positive (+) cable from the positive (+) terminal (1) of the booster battery.
14. Disconnect the red positive (+) cable from the remote positive (+) terminal (2) of the vehicle with the discharged battery.

Charging System Test

Charging System Test

The driver information center (DIC) may display a "Charging System Failure" message. This message being displayed is the result of a class 2 message being sent by the engine control module (ECM), instrument panel module (IPM), dash integration module (DIM), or the instrument panel cluster (IPC) to the DIC. Each module has a different criteria for requesting the message to be displayed. Refer to Charging System Description and Operation .

Charge Indicator Always On

Charge Indicator Inoperative

Charge Indicator Inoperative

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.

Generator Noise Diagnosis

Starter Solenoid Does Not Click

Starter Solenoid Does Not Click

Starter Solenoid Clicks, Engine Does Not Crank

Starter Solenoid Clicks, Engine Does Not Crank

Engine Cranks Slowly

Inspect the following items

1. Battery - Perform the Battery Inspection/Test. Refer to «Battery Inspection/Test»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Wiring - Inspect the wiring for damage. Inspect all connections to the starter motor, the solenoid, the battery, and all ground connections. Refer to «Circuit Testing»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing) , «Wiring Repairs»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs) , «Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor) , and «Connector Repairs»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs) in Wiring Systems.
3. Engine - Verify that the engine is not seized.

If the battery, the wiring, and the engine are functioning properly, and the engine continues to crank slowly, replace the starter motor. Refer to Starter Motor Replacement (LY7) or Starter Motor Replacement (LH2) .

Inspect the flywheel ring gear for damage or unusual wear.

The number below refers to the step number on the diagnostic table.

1. 5: A starter motor that remains engaged after engine start up can be cause by a starter relay that hangs up or a low current short to B+ on the starter solenoid crank voltage circuit. Verify the integrity of the starter solenoid crank voltage circuit before replacing the starter motor.

Starter Motor Noise Diagnosis

Removal Procedure

1. Turn OFF all the lamps and accessories.
2. Turn the ignition OFF.
3. Disconnect the battery negative cable (2) from the battery.

Installation Procedure

1. Connect the battery negative (2) cable to the battery. Tighten: Tighten the bolt to 17 N.m (13 lb ft).
2. Power sunroof calibration: Turn the ignition switch to the RUN position. Turn the power sunroof switch to the closed position. After the sunroof fully closes and the motor stops, press and hold in the switch for 3 seconds. Turn the power sunroof switch to the tilt position. After the sunroof reaches the tilt position and the motor stops, press and hold in the switch for 3 seconds. Turn the power sunroof switch to the full open position. After the sunroof is fully open and the motor stops, press and hold in the switch for 3 seconds. Turn the power sunroof switch to the closed position. After the sunroof fully closes and the motor stops, press and hold in the switch for 3 seconds.
3. Power windows calibration: Repeat these steps for each window. Turn the ignition switch to the RUN position. Press the power window switch to the down position. After the window is in the full down position, press and hold the switch in the down position for 3 seconds. Press the power window switch to the up position. After the window is in the full up position, press and hold the switch in the up position for 3 seconds.
4. Heat and A/C control head calibration: Turn the ignition switch to the RUN position. Simultaneously press the AUTO and OFF buttons, located on the heat and A/C control head, for at least 5 seconds. After initiation, the stepper motors will cycle from one stop to the other. You may hear the motors cycling while calibrating.
5. Relearn the tire pressure sensor system, if necessary. Refer to «Tire Pressure Sensor Learn»(/cadillac/srx/i-2003-2009/remont/warning-system/#tire-pressure-monitoring-system) in Tire Pressure Monitoring.

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the bolt (1) securing the battery negative cable to the side rail.
3. Disconnect the body harness connector (3) from the battery negative cable.
4. Remove the stud securing the battery negative cable to the engine block.
5. Lower the vehicle.
6. Remove the battery negative cable from the engine.

1. Position the battery negative cable to the engine.
2. Install the battery negative cable to engine stud. Tighten: Tighten the stud to 50 N.m (37 lb ft).
3. Install the bolt (1) securing the battery negative cable to the side rail. Tighten: Tighten the bolt to 36 N.m (27 lb ft).
4. Connect the body harness connector (3) to the battery negative cable.
5. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
3. Disconnect the cable retaining clip from the stud on the shock tower.
4. Remove the bolt securing the battery negative cable to the shock tower.
5. Disconnect the instrument panel harness connector from the battery negative cable.
6. Disconnect the cable retaining clips from the engine bracket.
7. Remove the bolt securing the battery negative cable to the engine block.
8. Remove the battery negative cable.

1. Position the battery negative cable to the engine.
2. Install the bolt securing the battery negative cable to the engine block. Tighten: Tighten the bolt to 25 N.m (18 lb ft).
3. Connect the cable retaining clips to the engine bracket.
4. Connect the instrument panel harness connector to the battery negative cable.
5. Install the bolt securing the battery negative cable to the shock tower. Tighten: Tighten the bolt to 10 N.m (89 lb in).
6. Connect the cable retaining clip to the stud on the shock tower.
7. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
8. Connect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the battery positive cable from the battery.
3. Depress the tabs in order to remove the cover from the electrical center.
4. Remove the nut (1) securing the battery positive cable (2) to the electrical center.
5. Reposition the protective boot from the generator output BAT terminal for access.
6. Remove the generator output BAT terminal nut (3) and disconnect the battery positive lead (2) from the generator.
7. Remove the starter terminal nut (1) and disconnect the battery positive cable (2) from the starter.
8. Lower the vehicle.
9. Remove the battery positive cable from the engine.

1. Position the battery positive cable to the engine.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Connect the battery positive cable (2) to the starter and install the starter terminal nut (1). Tighten: Tighten the nut to 10 N.m (89 lb in).
4. Connect the battery positive lead (2) to the generator and install the generator BAT terminal nut (3). Tighten: Tighten the nut to 13 N.m (115 lb in).
5. Install the protective boot to the generator output BAT terminal.
6. Lower the vehicle.
7. Install the nut (1) securing the battery positive cable (2) to the underhood fuse block. Tighten: Tighten the nut to 15 N.m (11 lb ft).
8. Install the electrical center cover.
9. Connect the battery positive cable to the battery. Tighten: Tighten the battery cable to 17 N.m (13 lb ft).
10. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Always use replacement cables that are of the same type, diameter and length of the cables that you are replacing.
2. Always route the replacement cable the same way as the original cable.

1. Disconnect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the battery positive cable (1) from the battery.
3. Remove the wiring harness from the retaining features on the underhood fuse block cover.
4. Depress the tabs in order to remove the underhood fuse block cover from the underhood fuse block.
5. Remove the nut (1) securing the battery positive cable (2) to the underhood fuse block.
6. Disconnect the cable retaining clip from the stud.
7. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
8. Remove the positive battery cable (2) from the starter motor.
9. Remove the positive battery cable from the retaining features on the engine wiring harness bracket.
10. Remove the positive battery cable from the vehicle.

1. Position the battery positive cable to the engine.
2. Install the positive battery cable to the retaining features on the engine wiring harness bracket.
3. Connect the battery positive cable (2) to the starter and install the starter terminal nut. Tighten: Tighten the nut to 10 N.m (89 lb in).
4. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
5. Connect the cable retaining clip to the stud.
6. Install battery positive cable (2) and nut (1) to the underhood fuse block. Tighten: Tighten the nut to 15 N.m (11 lb ft).
7. Install the underhood fuse block cover to the underhood fuse block.
8. Install the wiring harness to the retaining features on the underhood fuse block cover.
9. Connect the battery positive cable (1) to the battery. Tighten: Tighten the battery cable to 17 N.m (13 lb ft).
10. Connect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the battery positive cable (1) from the battery.
3. Remove the battery heat shield. Refer to «Battery Heat Shield Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Remove the battery retainer bolt and battery retainer.
5. Remove the battery from the vehicle.

1. Install the battery into the vehicle.
2. Install the battery retainer and bolt. Tighten: Tighten the bolt to 18 N.m (13 lb ft).
3. Install the battery heat shield. Refer to «Battery Heat Shield Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Connect the battery positive cable (1) to the battery. Tighten: Tighten the battery cable bolt to 17 N.m (13 lb ft).
5. Connect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the battery from the vehicle. Refer to «Battery Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the bolts from the battery tray.
3. Remove the battery tray from the vehicle.

1. Install the battery tray into the vehicle.
2. Install the battery tray bolts. Tighten: Tighten the battery tray bolts to 6 N.m (53 lb in).
3. Install the battery into the vehicle. Refer to «Battery Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Disconnect the battery positive cable (1) from the battery.
3. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Depress the locking tabs (1) on the side of the battery heat shield.
5. Remove the battery heat shield from the battery.

1. Position the battery heat shield downward over the battery.
2. Ensure that the heat shield locking tabs (1) are engaged.
3. Install the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Connect the battery positive cable (1) to the battery. Tighten: Tighten the battery positive cable to 17 N.m (13 lb ft).
5. Connect the battery negative cable (2). Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
2. Remove the bolts securing the left side ground strap to the cam cover and the engine block.
3. Remove the left side ground strap from the engine.
4. Remove the bolts securing the right side ground strap to the cam cover and the engine block.
5. Remove the right side ground strap from the cylinder head.

1. Install the right side ground strap into the vehicle.
2. Install the right side ground strap to cam cover bolt. Tighten: Tighten the ground strap to cam cover bolt to 10 N.m (89 lb in).
3. Install the right side ground strap to cylinder head bolt. Tighten: Tighten the ground strap to cylinder head bolt to 25 N.m (18 lb ft).
4. Install the left side ground strap into the vehicle.
5. Install the left side ground strap to cam cover bolt. Tighten: Tighten the ground strap to cam cover bolt to 10 N.m (89 lb in).
6. Install the left side ground strap to cylinder head bolt. Tighten: Tighten the ground strap to cylinder head bolt to 25 N.m (18 lb ft).
7. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).

1. Turn the ignition OFF.
2. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Remove the starter solenoid electrical connector from the starter.
4. Remove the starter terminal nut (1) and the battery positive cable (2) from the starter.
5. Remove the starter motor bolts.
6. Remove the starter motor.

1. Install the starter motor.
2. Install the starter motor bolts Tighten: Tighten the bolts to 50 N.m (37 lb ft).
3. Install the battery positive cable (2) to the starter and install the starter terminal nut (1). Tighten: Tighten the nut to 10 N.m (89 lb in).
4. Install the electrical connector to the starter solenoid.

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
3. Disconnect the battery positive cable (2) from the starter.
4. Disconnect the wire (4) from the S terminal on the starter.
5. Remove the starter motor bolts.
6. Remove the starter motor from the engine.

1. Install the starter motor to the engine.
2. Install the starter motor bolts. Tighten: Tighten the bolts to 30 N.m (22 lb ft).
3. Connect the wire (4) and nut to the S terminal on the starter. Tighten: Tighten the nut to 4 N.m (35 lb in).
4. Connect the battery positive cable (4) and nut to the starter terminal. Tighten: Tighten the nut to 10 N.m (89 lb in).
5. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
6. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Turn the ignition OFF.
2. Remove the generator. Refer to «Generator Replacement (LY7)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 AWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 RWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Remove the coolant inlet pipe lower bolt from the generator bracket.
4. Remove the belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) .
5. Remove the generator bracket bolts.
6. Remove the generator bracket.

1. Install the generator bracket.
2. Install the generator bracket bolts. Tighten: Tighten the bolts in the sequence shown. Tighten the bolts (1, 2) to 50 N.m (37 lb ft). Tighten the bolt (3) to 23 N.m (17 lb ft).
3. Install the belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) .
4. Install the coolant inlet pipe lower bolt from the generator bracket.
5. Install the generator. Refer to «Generator Replacement (LY7)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 AWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 RWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the generator. Refer to «Generator Replacement (LY7)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 AWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 RWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Mechanical - 4.6L (LH2).
3. Remove the generator drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
4. Remove the right side engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
5. Remove the generator bracket bolts.
6. Remove the generator bracket from the engine.

1. Install the generator bracket to the engine.
2. Install the generator bracket bolts. Tighten: Tighten the bolts in the sequence shown to 50 N.m (37 lb ft).
3. Install the right side engine mount bracket. Refer to «Engine Mount Bracket Replacement - Right (w/RWD)»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) or «Engine Mount Bracket Replacement - Right (w/AWD)»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
4. Install the generator drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
5. Install the generator. Refer to «Generator Replacement (LY7)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 AWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) or «Generator Replacement (LH2 RWD)»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Mechanical - 4.6L (LH2).
6. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the drive belt from the generator. Refer to «Drive Belt Replacement - Generator and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L (LY7).
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
4. Disconnect the electrical connector (1) from the generator.
5. Reposition the protective boot from the generator output BAT terminal for access.
6. Remove the generator output BAT terminal nut (3) and disconnect the battery positive lead (2) from the generator.
7. Remove the generator lower bolts.
8. Lower the vehicle.
9. Remove the generator upper bolt.
10. Remove the generator from the engine.

1. Install the generator to the engine.
2. Install the generator upper bolt.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
4. Install the generator lower bolts. Tighten: Tighten the bolts to 50 N.m (37 lb ft).
5. Install the battery positive lead (2) and the generator BAT terminal nut (3) to the generator. Tighten: Tighten the nut to 13 N.m (115 lb in).
6. Install the BAT terminal boot.
7. Connect the electrical connector (1) to the generator.
8. Lower the vehicle.
9. Install the drive belt to the generator. Refer to «Drive Belt Replacement - Generator and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L (LY7).
10. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
3. Remove the upper generator mounting bolts (1, 3).
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
5. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
6. Remove the front wheels. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
7. Remove the right side wheelhouse liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Remove the right and left side stabilizer shaft links at the lower control arm. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/srx/i-2003-2009/remont/suspension-front/#front-suspension-system) in Front Suspension.
9. Rotate the stabilizer shaft downward to gain access to the generator and to create a removal envelop for generator removal.
10. Perform the remainder of the removal process through the wheelhouse opening.
11. Cut the tie strap securing the wiring harness to the generator.
12. Remove the lower generator mounting bolt.
13. Lift the generator off of the mounting bracket in order to gain access to the connector and the generator output BAT terminal nut.
14. Disconnect the wire harness electrical connector from the generator.
15. Reposition the protective boot from the generator output battery terminal for access.
16. Remove the generator output battery terminal nut and disconnect the battery positive lead from the generator.
17. Remove the generator from the vehicle.

1. Position the generator near the installed position.
2. Connect the battery positive lead to the generator and install the generator output battery terminal nut. Tighten: Tighten the nut to 10 N.m (89 lb in).
3. Press the protective boot on to the generator output BAT terminal.
4. Connect the wiring harness connector to the generator.
5. Position the generator to the generator bracket on the engine.
6. Install the lower generator mounting bolt, but do not tighten at this time.
7. Lower the vehicle.
8. Install the upper generator mounting bolts. Tighten: Tighten the bolts in the sequence shown to 50 N.m (37 lb ft).
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
10. Install a new tie strap to secure the wiring harness to the generator.
11. Install the right and left side stabilizer shaft links to the lower control arm. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/srx/i-2003-2009/remont/suspension-front/#front-suspension-system) in Front Suspension.
12. Install the right side wheelhouse liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
13. Install the front wheels. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
14. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
15. Lower the vehicle.
16. Install the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
17. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
3. Remove the upper generator mounting bolts (1, 3).
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
5. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
6. Cut the tie strap securing the wiring harness to the generator.
7. Remove the lower generator mounting bolt.
8. Lift the generator off of the mounting bracket in order to gain access to the connector and the generator output BAT terminal nut.
9. Disconnect the wire harness electrical connector from the generator.
10. Reposition the protective boot from the generator output battery terminal for access.
11. Remove the generator output battery terminal nut and disconnect the battery positive lead from the generator.
12. Remove the generator from the vehicle.

1. Position the generator near the installed position.
2. Connect the battery positive lead to the generator and install the generator output battery terminal nut. Tighten: Tighten the nut to 10 N.m (89 lb in).
3. Press the protective boot on to the generator output BAT terminal.
4. Connect the wiring harness connector to the generator.
5. Position the generator to the generator bracket on the engine.
6. Install the lower generator mounting bolt, but do not tighten at this time.
7. Lower the vehicle.
8. Install the upper generator mounting bolts. Tighten: Tighten the bolts in the sequence shown to 50 N.m (37 lb ft).
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
10. Install a new tie strap to secure the wiring harness to the generator.
11. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
12. Lower the vehicle.
13. Install the generator drive belt. Refer to «Drive Belt Replacement - Generator»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L (LH2).
14. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

Scheme 6

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

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

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

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

The battery has 3 functions as a major source of energy

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

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

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

Scheme 7

Battery Ratings

A battery may have 3 ratings

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

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

Amp Hour

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

Reserve Capacity

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

Cold Cranking Amperage

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

Generator

The generator features the following major components

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

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

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

Regulated Voltage Control (RVC)

This vehicle comes equipped with GEN II RVC. RVC is used to more accurately control the amount of voltage put into the battery based upon the battery state of charge (SOC) and battery temperature.

The main components of the RVC system is a new voltage regulator, dash integration module (DIM), and the engine control module (ECM).

1. Voltage regulator - Uses a PWM signal on the generator L-terminal circuit instead of a 5 volt reference signal from the ECM to determine voltage output of the generator.
2. ECM - Controls the PWM signal to the regulator and provides diagnostics for the generator L-terminal and generator F-terminal. It also provides feedback of the generator F-terminal to the DIM for its calculations.
3. DIM - Calculates an estimate of the battery SOC and battery temperature based upon, battery voltage and internal calibrations. When the DIM has determined what voltage the battery should receive, a message is sent to the ECM. This message tells the ECM what percentage to set the PWM signal at.

With RVC in closed loop control of the generator, it can vary the voltage at the battery from 13.4 volts, battery temperature above 70°C (158°F) and battery SOC 95 percent or higher, to 14.9 volts, battery temperature below -30°C (-22°F) and battery SOC 65 percent or lower. If RVC looses control of the generator because of a failure the voltage regulator will default to 13.9 volts at the battery and function as a normal generator.

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

When the engine is running, The ECM sends a PWM signal to the voltage regulator. The generator's voltage regulator then controls the current to the rotor according to the PWM signal received, thereby controlling the output voltage. The rotor current is proportional to the electrical pulse width supplied by the regulator. The PWM signal may vary between 12 percent and 88 percent. The lower the PWM signal percentage the lower the generator voltage output will be. Below 12 percent and above 88 percent the voltage regulator defaults to 13.9 volts. This generator is self starting and does not require voltage on the L-terminal circuit to initiate battery charging. This also means that the generator cannot be commanded OFF with the scan tool. When the voltage regulator detects a charging system problem, it grounds the generator L-terminal circuit to signal the ECM that a problem exists. The ECM also monitors the generator field duty cycle signal circuit for failures.

Charging System Indicators

The IPC illuminates the charge indicator when the following occurs

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

BATTERY NOT CHARGING - 7

The radio displays the BATTERY NOT CHARGING - 7 message in the DIC when the ECM detects a malfunction with the generator output. The IPC receives a class 2 message from the ECM requesting illumination.

BATTERY SAVER ACTIVE - 27

The radio displays the BATTERY SAVER ACTIVE - 27 message in the DIC when the dash integration module (DIM) reduces or disables the performance of some vehicle systems in order to reduce the load on the charging system. The radio receives a class 2 message from the DIM requesting illumination.

BATTERY VOLTAGE HIGH - 8

The radio displays the BATTERY VOLTAGE HIGH - 8 message in the DIC when the IPC determines that the system voltage is greater than 16 volts. The IPC receives a class 2 message from the dash integration module (DIM) indicating the system voltage.

BATTERY VOLTAGE LOW - 6

The radio displays the BATTERY VOLTAGE LOW - 6 message in the DIC when the IPC determines that the system voltage is less than 11 volts. The IPC receives a class 2 message from the dash integration module (DIM) indicating the system voltage.

SERVICE CHARGING SYS - 102

The radio displays the SERVICE CHARGING SYS - 102 message in the DIC when the ECM detects a malfunction with the generator output. The IPC receives a class 2 message from the ECM requesting illumination.

Starting System Description and Operation

The PG-260M and PG-260L are non-repairable starter motors. They have pole pieces that are arranged around the armature. Both solenoid windings are energized. The pull-in winding circuit is completed to the ground through the starter motor. The windings work together magnetically to pull and hold in the plunger. The plunger moves the shift lever. This action causes the starter drive assembly to rotate on the armature shaft spline as it engages with the flywheel ring gear on the engine. Moving at the same time, the plunger also closes the solenoid switch contacts in the starter solenoid. Full battery voltage is applied directly to the starter motor and it cranks the engine.

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

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

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

Moving the ignition switch to the CRANK position sends a 12 V signal to the ECM Ignition Crank Sense. The ECM verifies that the transmission is in the PARK or NEUTRAL position. The ECM then grounds the control circuit of the STARTER relay. When the STARTER relay is energized it allows voltage to the starter solenoid S terminal.

Electrical Power Management

Electrical power management (EPM) is used to monitor and control the charging system and alert the driver of possible problems within the charging system. The EPM system makes the most efficient use of the generator output, improves the battery state-of-charge (SOC), refer to Battery Description and Operation , extends battery life, and manages system electrical loads. EPM has also been know as "load management" or "load-shed" in the past.

EPM performs the following 3 functions

1. Monitors battery voltage and estimates battery SOC
2. Takes corrective actions by boosting idle speed, reducing system electrical loads, and/or adjusting the generator regulated voltage control (RVC).
3. Perform diagnostics and informs the driver of charging system malfunctions

The EPM algorithm is run any time the dash integration module (DIM) is awake, which includes engine running, key on, accessory mode, and retained accessory power (RAP). During this time the DIM continuously estimates the battery SOC based on battery voltage, estimated net amp hours, refer to Battery Description and Operation , battery capacity, initial SOC, and estimated battery temperature. Estimated battery temperature is a calculation based on key off time, engine run time, and the temperature reading provided by the engine control modules (ECM) air intake temperature or HVACs outside air temperature.

When the EPM algorithm is running, the DIM calculates the net charge rate on the electrical system by making constant voltage measurements. It uses the measurements to calculate the charge rate in amp/hours. If the DIM detects a negative charge rate, equal to a discharge from the battery, EPM can request up to 3 levels of idle boost from the ECM, when the vehicle is in park or neutral, as well as up to 2 levels of load shedding for a total of 5 levels of corrective action to maintain proper vehicle electrical system operation.

The DIM sends a serial data request to the PCM/ECM to increase the idle speed. The PCM/ECM then adjusts the idle speed by using a special program and idle speed ramp calculations in order to prevent driveability and safety concerns. The idle speed boost and cancel function will vary from vehicle to vehicle and from one moment to another on the same vehicle. This happens because the PCM/ECM responds to changes in the inputs from the sensors used to control the powertrain. In order to maintain Idle quality the ECM may not enter idle boost for up to 120 seconds, unless there is a manual change in throttle position. There is no set time limit for the idle decrease when the criteria has been met to exit idle boost, unless there is a manual change in throttle position.

Each EPM function, either idle boost or load-shed, is discrete. No 2 functions are active at the same time. However, the set flags may be set at the same time. Idle boost is activated in incremental steps, idle boost 1 must be active before idle boost 2 can be active. The criteria used by the DIM to regulate EPM are outlined below

Load Shed System Description and Operation

During each load management function, the DIM checks the battery temperature, battery voltage and amp-hour calculations and determines if the DIM should implement a different power management function.

The highest loads on the electrical system are the resistance load of heating elements. The DIM controls the heating elements in the outside rear view mirrors, the rear window and the heated seats, either directly or by sending messages to any module controlling power to these devices.

The second highest load on the electrical system are the blowers used in the HVAC system. The DIM will send messages to the HVAC system controller that will result in reducing the blower operation on vehicles equipped with automatic HVAC systems.

Load-Shed

This vehicle uses the following load-shed actions

Load Shed System Description and Operation

Special Tools

Special Tools Illustration Tool Number/Description J 38758 Parasitic Draw Test Switch J 42000 Battery Tester

Scheme 8

Scheme 9

See also:
• Diagnostic System Check - Vehicle
• Power and Grounding Connector End Views
• Computer/Integrating Systems Connector End Views
• Testing for Intermittent Conditions and Poor Connections
• Connector Repairs
• Control Module References
• Engine Controls Schematics
• Engine Control Module (ECM) Connector End Views
• Circuit Testing
• Wiring Repairs
• Engine Controls Schematics
• Engine Control Module (ECM) Connector End Views
• Checking Aftermarket Accessories
• BATTERY DISCONNECT CAUTION
• Fastener Notice
• Body Control System Description and Operation
• Keyless Entry System Description and Operation
• Power Distribution Schematics
• Drive Belt Replacement - Generator and Water Pump
• Drive Belt Replacement - Generator
• Drive Belt Tensioner Diagnosis
• Drive Belt Tensioner Diagnosis
• Master Electrical Component List
• Ignition Switch Replacement
• Symptoms - Engine Mechanical
• Symptoms - Engine Mechanical
• Engine Flywheel Replacement
• Engine Flywheel Replacement
• Tire Pressure Sensor Learn
• Lifting and Jacking the Vehicle
• Air Inlet Grille Panel Replacement
• Tire and Wheel Removal and Installation
• Stabilizer Shaft Link Replacement
• DTC B1327
• Charging System Test
• Starter Solenoid Does Not Click
• Starting System Description and Operation
• Battery Common Causes of Failure
• Charge Indicator Inoperative
• Starter Solenoid Clicks, Engine Does Not Crank
• Engine Cranks Slowly
• Special Tools
• Battery Usage
• Generator Usage