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DTC C0899

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using the 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 C0899 00: Device Voltage Low - EBCM

DTC C0899 03: Device Voltage Low - Rear Differential Clutch Control Module

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

B+

C0899 00, C0899 03

C0899 00, C0899 03

-

-

Ground

-

C0899 00, C0899 03

-

-

Typical Scan Tool Data

Battery Voltage Signal - EBCM

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions: Ignition ON, Engine OFF.

Parameter Normal Value: 12.60 Volts.

B+

0.00 Volts*

0.00 Volts*

-

*The scan tool will not communicate with the EBCM if the battery voltage is less than 7 volts.

Circuit/System Description

The following control modules monitor the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly.

    • Electronic brake control module (EBCM)
    • Rear differential clutch control module

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

C0899 00

One of the following conditions exists for 0.5 seconds, or 5 seconds if the engine is cranking:

    • The EBCM detects that the battery voltage is less than 9.7 V, and the vehicle speed is greater than 0 km/h.
    • The EBCM detects that the battery voltage is less than 8.45 V, regardless of vehicle speed.

C0899 03

The rear differential clutch control module detects that the system voltage is less than 8 V for 30 seconds.

Action Taken When the DTC Sets

C0899 00

    • The antilock brake system (ABS), traction control system, and vehicle stability enhancement system are disabled.
    • The electronic brake force distribution is disabled, if the battery voltage is less than 8.45 V.
    • The ABS and vehicle dynamics caution indicators turn ON.
    • The BRAKE indicator turns ON, if the battery voltage is less than 8.45 V.
    • The driver information centre displays the ALL WHEEL DRIVE OFF message, if equipped.

C0899 03

    • A driver information centre message and/or a warning may be displayed.
    • Temporarily disables AWD mode.

Conditions for Clearing the DTC

C0899 00

    • The DTC will pass when the condition for setting the DTC is no longer present, and the ignition is cycled.
    • The EBCM clears a history DTC when the DTC does not fail in 100 consecutive ignition cycles.
    • The indicators and driver information centre message turn OFF when the battery voltage is greater than 9.7 V.

C0899 03

The system voltage returns above 8 V for 1 second.

Diagnostic Aids
    • A low voltage DTC in multiple modules indicates a concern in the charging system.
    • The ABS, BRAKE, and vehicle dynamics caution indicators may turn ON without any DTCs set, if the EBCM detects that the battery voltage is less than 9.7 V, and there is no vehicle speed.

Reference Information

Schematic Reference

    •  Antilock Brake System Schematics
    •  Rear Axle Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

    •  ABS Description and Operation
    •  Charging System Description and Operation
    •  Rear Drive Axle 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, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V.
    2. ⇒If not within the specified range, refer to Charging System Test .
  2. Observe the appropriate module scan tool Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 V.

Circuit/System Testing

C0899 00

  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 terminal 16 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground:
    4. • Terminal 1
    • Terminal 32
    ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the EBCM.

C0899 03

  1. Ignition OFF, disconnect the harness connector at the rear differential clutch control module.
  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 terminal 3 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 10 and ground.
    4. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the rear differential clutch control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Electronic Brake Control Module Replacement
    • Control Module References for EBCM replacement, setup and programming
   


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