Hummer H3. Manual — part 577

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the
connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the
malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions
and Poor Connections .

Test Description

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

5: Tests if the malfunction is caused by the steering wheel module or by the steering wheel
module coil.

7: Determines which DTCs are present. If DTC B0022 or B0042 is present, test the steering
wheel module for a short between high and low circuits in stage 1 or stage 2. If DTC B0024
or B0043 is present, test the steering wheel module high and low circuits for an open and
for high resistance in stage 1 or stage 2. If DTC B0026 or B0044 is present, test the steering
wheel module high and low circuits for an open and for high resistance in stage 1 or stage 2.

DTC B0022, B0024, B0026, B0042, B0043 or B0044

Step

Action

Yes

No

Schematic Reference: SIR Schematics
Connector End View Reference: SIR Connector End Views

1

Did you perform a Diagnostic System
Check - Vehicle?

Go to Step 2

Go to Diagnostic
System Check -
Vehicle

2

1. Turn OFF the ignition.

2. Disconnect the steering wheel module

coil in-line connector. Refer to
Inflatable Restraint Steering Wheel
Module Coil Replacement.

3. Inspect the component and harness

sides of the in-line connector for the
steering wheel module coil for damage
or corrosion that may cause the
malfunction. Refer to Testing for
Intermittent Conditions and Poor
Connections and Connector
Repairs .

Does connector exhibit any signs of damage

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

or corrosion?

Go to Step 3

Go to Step 4

3

1. If the in-line connector for the steering

wheel module coil is damaged, the
steering wheel module coil must be
replaced. Refer to Inflatable
Restraint Steering Wheel Module
Coil Replacement.

2. If the wiring harness side of steering

wheel module coil in-line connector is
damaged, replace the harness side of
the connector. Refer to Connector
Repairs .

Did you complete the repair?

Go to Step 11

-

4

1. Use J 38715-80 Adapter to connect

the J 38715-A to the harness side of
the steering wheel module coil
connector. See Special Tools. Use
BASE OF COLUMN and
PASSENGER INFLATOR
connectors.

2. Turn ON the ignition, with the engine

OFF.

3. Use the scan tool to request SIR DTCs

displayed.

Does the scan tool indicate that DTC
B0022, B0024, B0026, B0042, B0043 or
B0044 are current?

IMPORTANT:

When installing J 38715-A SIR
Driver/Passenger Load Tool for testing
the dual stage steering wheel module,
the correct 4-way load tool adapter
connector must be used. See Special
Tools. Failure to use the correct 4-way
load tool connector will set additional
codes when testing.

Go to Step 6

Go to Step 5

1. Turn OFF the ignition.

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

5

2. Disconnect and remove both the J

38715-A and adapter. See Special
Tools.

3. Connect the steering wheel module

coil in-line connector.

4. Remove the steering wheel module.

Refer to Inflatable Restraint
Steering Wheel Module
Replacement.

5. Use the J 38715-120 adapter to

connect the J 38715-A to the upper
steering wheel module coil connector
on top of the steering column. See
Special Tools. Use STEERING
COLUMN and PASSENGER
INFLATOR connectors.

6. Turn ON the ignition, with the engine

OFF.

7. Use the scan tool to request SIR DTCs

displayed.

Does the scan tool indicate that DTC
B0022, B0024, B0026, B0042, B0043 or
B0044 are current?

Go to Step 9

Go to Step 8

6

1. Turn OFF the ignition.

2. Disconnect and remove both the J

38715-A and adapter. See Special
Tools.

3. Disconnect the inflatable restraint

sensing and diagnostic module (SDM)
connector. Refer to Inflatable
Restraint Sensing and Diagnostic
Module Replacement.

4. Inspect the SDM connector for

damage or corrosion that may cause a
malfunction in the steering wheel
module stage 1 or stage 2 high and/or

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

low circuits. Refer to Testing for
Intermittent Conditions and Poor
Connections and Connector
Repairs .

Did you find and correct the condition?

Go to Step 11

Go to Step 7

7

1. If DTC B0022 or B0042 is present,

test the steering wheel module for a
short between the high and low
circuits in stage 1 or stage 2.

2. If DTC B0024 or B0043 is present,

test the steering wheel module high
and low circuits for a short to ground
and for a short to voltage in stage 1 or
stage 2.

3. If DTC B0026 or B0044 is present,

test the steering wheel module high
and low circuits for an open and for
high resistance in stage 1 or stage 2.

4. If any of the above conditions exist,

refer to Circuit Testing and Wiring
Repairs .

Did you find and correct the condition?

Go to Step 11

Go to Step 10

8

1. Turn OFF the ignition.

2. Replace the steering wheel module.

Refer to Inflatable Restraint
Steering Wheel Module
Replacement.

Did you complete the replacement?

Go to Step 11

-

9

1. Turn OFF the ignition.

2. Replace the steering wheel module

coil. Refer to Inflatable Restraint
Steering Wheel Module Coil
Replacement.

Did you complete the replacement?

Go to Step 11

-

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3