GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 SRX 🢒 Engine 🢒 Engine Electrical 🢒 DTC C0899

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 C0899: Device Voltage Low

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

B+

C0899

C0899

--

--

Ground

--

C0899

--

--

Circuit/System Description

The electronic brake control module (EBCM) monitors the system voltage level available for ABS operation. A low voltage condition prevents the ABS system from operating properly.

Conditions for Running the DTC

Ignition is ON.

Conditions for Setting the DTC

This fault will be set if the system voltage to EBCM is less than 9 V for 100 msec.

Action Taken When the DTC Sets
    • Antilock Brake System (ABS) and Traction Control System (TCS) are disabled for the duration of the ignition cycle.
    • The ABS and TCS indicators illuminates on the IPC.
    • The DIC displays the Service Stability System message, if equipped.

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

A low voltage DTC in multiple modules indicates a concern in the charging system.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V.
    2. ⇒If the battery voltage is not within the specified range, refer to Charging System Test.
  2. Observe the scan tool EBCM battery positive voltage parameter. The reading should be between 12.6 and 15.5 V.

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminals listed below and ground:
    3. • Terminal E
    • Terminal F
    ⇒If greater than the specified range, test the ground circuits for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminals listed below and ground.
    4. • B+ Terminal A
    • B+ Terminal B
    • IGN Terminal C
    ⇒If the test lamp did not illuminate, test the B+ / Ignition circuits for a short to ground or an open/high resistance.
  4. If the circuit tests normal, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup and programming