Hummer H3. Manual — part 1130

Action Taken When the DTC Sets

The PCM stores DTC P0563 in the PCM memory when the diagnostic runs and fails.

The PCM will record the operating conditions at the time the diagnostic fails. The PCM
stores this information in Failure Records.

The PCM disables most outputs.

The transmission defaults to a predetermined gear.

The torque converter clutch (TCC) operation is inhibited.

The instrument panel cluster (IPC) displays a message.

The malfunction indicator lamp (MIL) will not illuminate.

Conditions for Clearing the DTC

The Conditions for Setting the DTC are no longer present.

A history DTC will clear after 40 malfunction-free ignition cycles.

The PCM receives the clear code command from the scan tool.

DTC P0563

Step

Action

Values

Yes

No

Schematic Reference: Starting and Charging Schematics
Connector End View Reference: Engine Electrical Connector End Views

1

Did you perform the Diagnostic
System Check - Vehicle?

-

Go to Step 2

Go to
Diagnostic
System
Check -
Vehicle

2

1. Turn OFF all the accessories.

2. Measure the battery voltage at

the battery using the DMM.

3. Operate the engine speed

above 2,000 RPM.

Is the battery voltage less than the
specified value?

19 V

Go to Step 4 Go to Step 3

3

Replace the generator. Refer to
Generator Replacement.
Is the action complete?

-

Go to Step 5

-

2007 Hummer H3

2007 ENGINE Engine Electrical - H3

SYMPTOMS - ENGINE ELECTRICAL

Perform Diagnostic System Check - Vehicle 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.

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

Charging System Description and Operation

Electrical Power Management Description and Operation

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 .

Inspect the easily accessible or visible system components for obvious damage or conditions
which could cause the symptom.

4

Replace the powertrain control
module (PCM). Refer to Control
Module References for
replacement, setup and
programming.
Did you compete the replacement?

-

Go to Step 5

-

5

1. Select the DTC option and the

Clear DTC Information option
using the scan tool.

2. Operate the vehicle within the

Conditions for Running the
DTC as specified in the
supporting text, if applicable.

Does the DTC reset?

-

Go to Step 2 System OK

IMPORTANT: The following steps must be completed before using the symptom

tables.

2007 Hummer H3

2007 ENGINE Engine Electrical - H3

Intermittent

Faulty 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 (Non-HP2)

Battery Electrical Drain/Parasitic Load Test

Battery Common Causes of Malfunction

Charging System Test

Charge Indicator Always On

Charge Indicator Inoperative

Generator Noise Diagnosis

Starter Solenoid Does Not Click

Starter Solenoid Clicks, Engine Does Not Crank

Engine Cranks Slowly

Starter Motor Noise Diagnosis

BATTERY INSPECTION/TEST (NON-HP2)

Diagnostic Aids

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

CAUTION: Refer to Battery Disconnect Caution .

IMPORTANT:

The battery test using the J 42000 Battery Tester requires
correct connections to the battery terminals. See Special
Tools. A failure to obtain the correct connections during the
test may result in a failed test on a good battery.

Use the Out of Vehicle test for each battery when testing a
vehicle with dual batteries.

2007 Hummer H3

2007 ENGINE Engine Electrical - H3

If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the
terminal bolt. See 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.

If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the
following steps:

1. Disconnect the negative battery cable.

2. Disconnect the positive battery cable.

3. Install the test adapters on the terminals.

4. Follow the instructions for testing a removed battery.

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:

1. Disconnect the negative battery cable.

2. Disconnect the positive battery cable.

3. Install the tester adapters.

4. Follow the instructions for testing a removed battery.

5. Replace the battery only if the second test shows a REPLACE BATTERY or BAD

CELL-REPLACE result.

Use the test code from the second test for any warranty purposes.

Use the correct terminal adapters.

Do not use any common bolts or a combination of bolts, of nuts and of washers as adapters
when testing the battery.

IMPORTANT: Always write the test code displayed by the tester on the

repair order for any warranty purposes. The number is a
unique code that describes the test data for a particular
battery at a particular time. The test code may
occasionally repeat when you retest the same battery.
More often, each test will result in a different code. Use
the test code from the second or Out of Vehicle test.

2007 Hummer H3

2007 ENGINE Engine Electrical - H3