Hummer H3. Manual — part 12

STARTER SOLENOID DOES NOT CLICK

Starter Solenoid Does Not Click

Are any electrical connections pulling on the
generator or are any hoses, etc. resting on the
generator?

Go to Step 7

Go to Step 8

7

1. Reroute the electrical connections to

relieve the tension.

2. Reroute the hoses, etc. away from the

generator.

3. Start the engine.

Has the noise decreased or stopped?

System OK

Go to Step 8

8

Inspect the drive belt for proper tension. Refer
to Drive Belt Tensioner Diagnosis for the 3.5L
engine.
Is the drive belt loose?

Go to Step 9

Go to Step 10

9

1. Replace the drive belt tensioner. Refer to

Drive Belt Tensioner Replacement for
the 3.5L engine.

2. Start the engine.

Has the noise decreased or stopped?

System OK

Go to Step 11

10

Compare the vehicle with a known good vehicle.
Do both vehicles make the same noise?

System OK

Go to Step 11

11

Replace the generator. Refer to Generator
Replacement.Has the noise decreased or
stopped?

IMPORTANT:

If no definite generator problems were found, be
sure that all other possible sources of objectionable
noise are eliminated before replacing the generator.
Replacing the generator may not change the noise
level if the noise is a normal characteristic of the
generator or the generator mounting.

Go to Step 12

-

12

Operate the system in order to verify the repair.
Did you correct the condition?

System OK

Go to Step 2

2006 Hummer H3

2006 ENGINE Engine Electrical - H3

Step

Action

Yes

No

Schematic Reference: Starting and Charging Schematics

1

Did you perform the Diagnostic System Check
- Vehicle?

Go to Step 2

Go to Diagnostic

System Check -

Vehicle in

Vehicle DTC

Information

2

Turn the ignition switch to the START position.
Does the engine crank?

Go to Testing

for Intermittent

Conditions and

Poor

Connections in

Wiring Systems

Go to Step 3

3

Is the security indicator flashing?

Go to Diagnostic

System Check -

Vehicle in

Vehicle DTC

Information

Go to Step 4

4

1. Install a scan tool.

2. Turn ON the ignition, with the engine

OFF.

3. With a scan tool, observe the Crank

parameter in the powertrain control
module (PCM) data list.

4. Turn the ignition switch to the START

position.

Does the scan tool display Yes?

Go to Step 5

Go to Step 13

5

1. Turn ON the ignition, with the engine

OFF.

2. With a scan tool, observe the Starter

Relay Command parameter in the PCM
data list.

3. Turn the ignition switch to the START

position.

Does the scan tool display Yes?

Go to Step 6

Go to Step 13

2006 Hummer H3

2006 ENGINE Engine Electrical - H3

6

1. Turn ON the ignition, with the engine

OFF.

2. Verify that the transmission is in Park or

Neutral.

3. With a scan tool, observe the Current

Gear parameter in the PCM data list.

Does the scan tool display Park or Neutral?

Go to Step 7

Go to Range

Selector

Displays

Incorrect Range

in Automatic

Transaxle - 4L60-

E

7

Turn the ignition switch to the START position.
Do you hear the STARTER relay click?

Go to Step 10

Go to Step 8

8

1. Turn OFF the ignition.

2. Disconnect the STARTER relay.

3. Turn ON the ignition, with the engine

OFF.

4. Connect a test lamp between the battery

positive voltage circuit of the STARTER
relay coil and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 21

9

1. Connect a test lamp between the battery

positive voltage circuit of the STARTER
relay coil and the control circuit of the
STARTER relay.

2. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 17

Go to Step 15

10

1. Turn OFF the ignition.

2. Disconnect the STARTER relay.

3. Connect a test lamp between the battery

positive voltage circuit of the STARTER
relay switch and a good ground.

Does the test lamp illuminate?

Go to Step 11

Go to Step 22

11

Connect a 30-amp fused jumper between the
battery positive voltage circuit of the
STARTER relay switch and the starter solenoid
crank voltage circuit.

2006 Hummer H3

2006 ENGINE Engine Electrical - H3

Does the engine crank?

Go to Step 17

Go to Step 12

12

Does the fuse in the jumper open?

Go to Step 23

Go to Step 14

13

1. Turn OFF the ignition.

2. Disconnect the PCM harness connector.

3. Connect a test lamp between the crank

voltage circuit of the PCM and a good
ground.

4. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 20

Go to Step 16

14

Test the starter solenoid crank voltage circuit
for a high resistance or open. Refer to Circuit
Testing and Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to Step 28

Go to Step 18

15

Test the control circuit of the STARTER relay
for an open or short to battery voltage. Refer to
Circuit Testing and Wiring Repairs in
Wiring Systems.
Did you find and correct the condition?

Go to Step 28

Go to Step 20

16

Test the crank voltage circuit of the PCM for a
high resistance or open. Refer to Circuit
Testing and Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to Step 28

Go to Step 19

17

Inspect for poor connections at the STARTER
relay. Refer to Testing for Intermittent
Conditions and Poor Connections
andConnector Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 28

Go to Step 24

18

Inspect for poor connections at the starter
solenoid. Refer to Testing for Intermittent
Conditions and Poor Connections
andConnector Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 28

Go to Step 25

Inspect for poor connections at the ignition
switch. Refer to Testing for Intermittent

2006 Hummer H3

2006 ENGINE Engine Electrical - H3