Hummer H3. Manual — part 1306

Callouts For Fig. 3

HYDRAULIC BRAKE CONNECTOR END VIEWS

Brake Fluid Level Switch

Fig. 4: Brake Fluid Level Switch Connector End Views
Courtesy of GENERAL MOTORS CORP.

Brake Fluid Level Switch Connector Parts Information

Callout

Component Name

1

Inflatable Restraint Vehicle Rollover Sensor (ASF)

2

Yaw Rate/Lateral and Longitudinal Accelerometer Sensor (JL4)

3

Brake Fluid Reservoir

4

Electronic Brake Control Module (EBCM) C2

5

Electronic Brake Control Module (EBCM)

6

Electronic Brake Control Module (EBCM) C1

7

Brake Fluid Level Switch

Connector Part Information

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Brake Fluid Level Switch Connector Terminal Identification

Park Brake Switch

Fig. 5: Park Brake Switch Connector End Views

OEM: 4F5288

Service: 15201888

Description: 2-Way F 2.3 II Series, Sealed (GY)

Terminal Part Information

Terminal/Tray: 8100-0460/6

Core/Insulation Crimp: E/1

Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Pin

Wire Color

Circuit No.

Function

1

BK

850

Ground

2

PK

849

Brake Fluid Level Sensor Signal

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Courtesy of GENERAL MOTORS CORP.

Park Brake Switch Connector Parts Information

Park Brake Switch Connector Terminal Identification

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DIAGNOSTIC STARTING POINT - HYDRAULIC BRAKES

Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the
Description and Operation information will help you determine the correct symptom diagnostic
procedure when a malfunction exists. Reviewing the Description and Operation information will
also help you determine if the condition described by the customer is normal operation. Refer to
Symptoms - Hydraulic Brakes in order to identify the correct procedure for diagnosing the
system and where the procedure is located.

DTC C0130

Diagnostic Instructions

Connector Part Information

OEM: 8911256

Service: 12102561

Description: 1-Way F 56 Series (WH)

Terminal Part Information

Terminal/Tray: 12124515/1

Core/Insulation Crimp: See Terminal Kit

Release Tool/Test Probe: 12094430/J-35616-42 (RD)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1134

Park Brake Switch Signal

DTC

Description

DTC C0130

** DESCRIPTION NOT COLLECTED **

DTC C0267

**DESCRIPTION NOT COLLECTED **

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0130

Low Brake Fluid Circuit Open

Diagnostic Fault Information

DTC C0130

Circuit/System Description

The electronic brake control module (EBCM) monitors the brake fluid level switch via the brake
fluid level sensor signal circuit. With the switch closed, the signal circuit is pulled to ground
indicating low fluid level. When low fluid level is seen, the EBCM will send a serial data
message to the IPC illuminating the red brake warning indicator. The body control module
(BCM) monitors the park brake switch via the park brake switch signal circuit. With the park
brake applied, the switch is closed and the signal circuit is grounded. The BCM will then send a
serial data message to the IPC requesting the red brake warning indicator be illuminated.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM detects an open in the low brake fluid circuit.

Action Taken When the DTC Sets

The EBCM disables the traction control system (TCS)/dynamic rear proportion
(DRP)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

The Brake Warning indicator turns ON.

Circuit

Short to

Ground

Open/High

Resistance

Short to
Voltage

Signal

Performance

Low Brake Fluid Signal Circuit

C0267

C0130

-

-

Ground

-

C0130

C0130

-

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3