Chevrolet Silverado / GMC Sierra. Service manual — part 704

DIAGNOSTIC STARTING POINT - ANTILOCK BRAKE SYSTEM

DTC C0196

C0196 00: Yaw Rate Circuit

C0196 5A: Yaw Rate Circuit Plausibility Failure

DTC C0201

C0201 00: Antilock Brake System (ABS) Enable Relay

Contact Circuit

C0201 04: Antilock Brake System (ABS) Enable Relay

Contact Circuit Open

C0201 0E: Antilock Brake System (ABS) Enable Relay

Contact Circuit Resistance Below Threshold

DTC C0242

C0242 00: Engine Control Module (ECM) Indicated TCS

Malfunction

P0856: Engine Control Module (ECM) Indicated TCS

Malfunction

DTC C0245

C0245 00: Wheel Speed Sensor Frequency Error

C0245 5A: Wheel Speed Sensor Plausibility Failure

DTC C0252

C0252 00: VSES Sensor Uncorrelated

DTC C0253

C0253 00: Centering Error

DTC C0299

C0299 00: Brake Booster Sensor Performance

C0299 5A: Brake Booster Sensor Plausibility Failure

C0299 31: Brake Booster General Checksum Failure

DTC C0455

C0455 00: Front Steering Position Sensor Circuit

DTC C0550

C0550 00: Electronic Control Unit (ECU) Performance
C0550 01: Electronic Control Unit (ECU) Performance
C0550 02: Electronic Control Unit (ECU) Performance
C0550 03: Electronic Control Unit (ECU) Performance
C0550 04: Electronic Control Unit (ECU) Performance

DTC C0561

C0561 71: System Disabled Information Stored Invalid Serial

Data Received

C0561 72: System Disabled Information Stored Alive Counter

Incorrect or not Updated

C0561 74: System Disabled Information Stored Value of

Signal Protection Calculation Incorrect

DTC C0569

C0569 00: System Configuration Error

DTC C0710

C0710 00: Steering Position Signal

C0710 5A: Steering Position Signal Plausibility Failure

DTC C0774

C0774 00: Low Tire Pressure System Performance

DTC C1100 or C1101

C1100 00: Brake Booster Vacuum Sensor Performance

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

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

The identification of the control modules which command the system

The ability of the control modules to communicate through the serial data circuit

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.

HYDRAULIC BRAKE BOOSTER CALIBRATION

Hydraulic Brake Booster Calibration

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

For vehicles under 8600 GVWR, the EBCM calibrates itself to the Brake Booster Vacuum
Sensor to learn specific engine vacuum and braking characteristics of the vehicle.

If the "Power Brake Booster" activates excessively or if excessive effort of the brake pedal is
consistently required, HBB calibration may be needed. To perform the HBB calibration, perform
the following steps:

1. Transmission in Park, engine running.

2. With scan tool connected to the vehicle, check for any DTCs. If there are any DTCs current,

diagnose and correct DTCs before proceeding.

3. Apply throttle pedal to attain 3000 RPM

4. Release throttle pedal.

5. Apply and hold brake pedal firmly for approximately 1 second, release brake pedal.

Perform this step 3 times. The entire sequence of steps 3 through 5 (consisting of one
throttle apply and three brake pedal applies) should take place within 7 seconds.

6. With the scan tool, navigate to the "data display" for the EBCM and observe the "HBB

Calibration Status" parameter. It should display "complete/success" If not, repeat HBB
Calibration.

DTC C0035 OR C0040 (WITH JL4)

Diagnostic Instructions

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

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 Descriptors

DTC C0035 00

Left Front Wheel Speed Sensor Circuit

DTC C0035 5A

Left Front Wheel Speed Sensor Circuit Plausibility Failure

DTC C0040 00

Right Front Wheel Speed Sensor Circuit

DTC C0040 5A

Right Front Wheel Speed Sensor Circuit Plausibility Failure

Diagnostic Fault Information

Circuit/System Description

The wheel speed sensor receives ignition voltage from the electronic brake control module
(EBCM) and provides a DC square wave signal back to the module. As the wheel spins, the
EBCM uses the frequency of the square wave signal to calculate the wheel speed.

Conditions for Running the DTC

Circuit

Short to

Ground

Open/High

Resistance

Short to

Voltage

Signal

Performance

Left Front Sensor Signal Circuit

C0035 00

C0035 00

C0035 00

C0035 5A

Left Front Sensor 12 volt
Reference Circuit

C0035 00

C0035 00

-

C0035 5A

Right Front Sensor Signal
Circuit

C0040 00

C0040 00

C0040 00

C0040 5A

Right Front Sensor 12 volt
Reference Circuit

C0040 00

C0040 00

-

C0040 5A

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

C0035 00 or C0040 00

The ignition is ON.

Ignition voltage is greater than 9.5 volts.

C0035 5A or C0040 5A

The ignition is ON.

Ignition voltage is greater than 9.5 volts.

The brake pedal is not pressed.

A DTC is not set for the other wheel speed circuit on the same axle.

Conditions for Setting the DTC

An erratic signal output of the wheel speed sensor is detected.

A short to ground, open/high resistance is detected on the wheel speed sensor signal circuit.

A short to voltage, short to ground or an open/high resistance is detected on the low
reference circuit.

A missing wheel speed sensor signal

Action Taken When the DTC Sets

The amber ABS indicator turns ON.

The Traction Control indicator turns ON.

The driver information center (DIC) displays warning message.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The EBCM automatically clears the history DTC when a current DTC is not detected in 100
consecutive drive cycles.

Diagnostic Aids

Inspect the back of the wheel bearing on the encoder surface for metal debris that could
cause an erratic reading with the sensor. Do not use a magnet to clean the debris, or damage
to the encoder ring may occur.

If 2 or more wheel speed sensors are inoperative diagnose each wheel speed sensor
individually.

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado