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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC K Sierra - 4WD 🢒 Suspension 🢒 Real Time Damping (RTD) 🢒 DTC C0000 Vehicle Speed Information Circuit Malfunction

DTC C0000 Vehicle Speed Information Circuit Malfunction W/RTD


Object Number: 590557 Size: LF
Suspension Controls Schematics
Suspension Controls Components
Data Link Connector Schematics

Circuit Description

The suspension control module receives a vehicle speed signal input from the powertrain control module via the vehicle speed signal circuit and also receives vehicle speed data over the serial data class 2 circuit. Once vehicle speed has been detected, the suspension control module compares the two inputs for accuracy.

Conditions for Running the DTC

Continuously after vehicle speed has been detected from one or both inputs.

Conditions for Setting the DTC

Class 2 vehicle speed is greater than 32 kph (20 mph) and the calculated speed input (hard wire) is less than 5 kph (3 mph) contentiously for 10 seconds.

Action Taken When the DTC Sets
    • Disable EVO outputs.
    • DTC C0000 will be stored in memory.

Conditions for Clearing the MIL/DTC
    • The suspension control module detects a vehicle speed signal from the PCM of greater than 20 MPH.
    • A history DTC will clear after not seeing the malfunction for 100 consecutive ignition cycles.
    • Using a scan tool.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Tests whether the condition is module, system, or condition related.

  2. Tests whether the condition has been corrected or identified as specified in the supporting text.

    3.

  3. Test for an open or short in the vehicle speed signal circuit of the suspension control module.

Step

Action

Value(s)

Yes

No

1

Did you perform the RTD Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, monitor the DTC Information for DTC C0000 in the Suspension Control Module.

Does the scan tool indicate that DTC C0000 is current?

--

Go to Step 4

Go to Step 3

3

Since most occurrences of this DTC are caused by a short or open vehicle speed signal circuit to the suspension control module, review the RTD System operation or, with the customer to verify the conditions under which the DTC set.

Did vehicle operation cause this DTC to set?

--

Go to Step  6

Go to Step 4

4

  1. Use the scan tool in order to clear the DTCs.

    2. IMPORTANT: Do not cycle the ignition.

  2. Operate the vehicle within normal operating conditions.

Does the DTC reset?

--

Go to Step 5

System OK

5

Test the vehicle speed signal circuit of the suspension control module for a short to ground, short to voltage and an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

System OK

Go to Step 7

6
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle (road test) within normal operating conditions.

Does the DTC reset?

--

Go to Step 7

System OK

7

Replace the Suspension Control Module. Refer to Electronic Suspension Control Module Replacement .

Did you complete the replacement?

--

System OK

--