Chevrolet Silverado / GMC Sierra. Service manual — part 719

the EBCM memory. Once all the IDs have been learned and vehicle speed is 25 mph, or greater,
the EBCM continuously compares IDs in the GMLAN message to its learned IDs to determine if
all the network modules are present.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM has not undergone the programming procedure.

Action Taken When the DTC Sets

The driver information center (DIC) displays the SERVICE ABS warning message.

Conditions for Clearing the DTC

A current DTC will clear when the EBCM has undergone the setup procedure.

Diagnostic Aids

A newly replaced EBCM will set DTC C0569 on its initial ignition ON cycle.

Reference Information

Scan Tool Reference

Control Module References for Scan Tool Information

Circuit/System Verification

1. Verify that C0569 is not set as current.

If the DTC is set, perform the EBCM setup procedure. Refer to Electronic Brake
Control Module Programming and Setup If the DTC resets, replace the EBCM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming

DTC C0710

2008 Chevrolet Silverado 1500

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

Diagnostic Instructions

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 C0710 00

Steering Position Signal

DTC C0710 5A

Steering Position Signal Plausibility Failure

Diagnostic Fault Information

Circuit/System Description

The steering angle sensor supplies input circuits to the electronic brake control module (EBCM)
from the Phase A and Phase B, the Index Pulse Phase C circuits, and 1 Analog signal circuit for
steering wheel angle. The analog signal is used along with the index pulse to calibrate the steering
angle sensor (SAS). The SAS position is then determined by Phase A and Phase B signals. The 2
input signals Phase A and Phase B are approximately 90 degrees out of phase. Once calibrated,
the EBCM dynamically interprets the relationship between the Phase A and Phase B inputs, and
determines the position of the steering wheel and the direction of the steering wheel rotation.

Conditions for Running the DTC

The ignition is ON.

Ignition voltage is greater than 9 volts.

Conditions for Setting the DTC

Opens, short to ground, or short to voltage

The calculated steering angle from the steering angle sensor does not correlate with the
steering angle calculated from the yaw rate.

Circuit

Short to

Ground

Open/High

Resistance

Short to

Voltage

Signal

Performance

Steering Position Signal Circuit

C0710 00

C0710 00

C0710 00

C0710 5A

2008 Chevrolet Silverado 1500

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

Action Taken When the DTC Sets

The EBCM disables the vehicle stability enhancement system (VSES) for the duration of
the ignition cycle.

The driver information center (DIC) displays the Service Stability System message.

The antilock brake system (ABS) remains functional.

The VSES Caution indicator turns ON.

Conditions for Clearing the DTC

The condition for 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

During diagnosis, park the vehicle on a level surface.

Inspect the vehicle for proper alignment. The car should not pull in either direction while
driving straight on a level surface.

Find out from the customer the conditions under which the DTC was set. This information
will help to duplicate the failure.

The snapshot function on the scan tool can help find an intermittent DTC.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)

Electrical Information Reference

Circuit Testing

2008 Chevrolet Silverado 1500

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

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Scan Tool Reference

Control Module References for Scan Tool Information

Circuit/System Verification

With scan tool installed, clear the DTCs. Turn the steering wheel through its full range and back
to straight ahead to center SAS. Using a scan tool, observe the Steering Wheel Position parameter
changes smoothly while turning steering wheel through the entire range. Correlate zero reading
with wheels in the straight ahead position. Drive the vehicle through a variety of maneuvers
turning to the left, and to the right and straight line at a speed greater than 20 km/h (13 mph).

If the DTC did not set as a current DTC see diagnostic aids.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the SAS.

2. Test for less than 2 ohm of resistance between the low reference circuit terminal 2 and

ground.

If greater than the specified range, test the low reference circuit for an open/high
resistance. If the circuit tests normal, replace the EBCM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and

ground.

If less than the specified range, test the 5-volt reference circuit for a short to ground or
an open/high resistance. If the circuit tests normal, replace the EBCM.

4. Test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and the signal circuit

terminal 6.

If less than the specified range, test the signal circuit for an open/high resistance. If the
circuit tests normal, replace the EBCM.

5. Ignition OFF, reconnect the SAS.

6. Disconnect the EBCM harness connector.

7. Test for infinite resistance between the signal circuit pin 6 and ground.

If less than the specified range, test the signal circuit for a short to ground.

8. Disconnect the SAS.

2008 Chevrolet Silverado 1500

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