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Pinpoint Test C: The Speedometer Is Inoperative

  1. C1 PERFORM THE INSTRUMENT PANEL CLUSTER (IPC) SELF-TEST 
    • Ignition ON.
    • Using a scan tool, perform the IPC  self-test.
    • Check for recorded Diagnostic Trouble Codes (DTCs) from the IPC  self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    1. Yes  : REFER to DTC CHART: IPC .
    2. No  : GO to C2 
  2. C2 PERFORM THE BODY CONTROL MODULE (BCM) SELF-TEST 
    • Using a scan tool, perform the BCM  self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    1. Yes  : REFER to: BODY CONTROL MODULE (BCM) .
    2. No  : GO to C3 
  3. C3 PERFORM THE GATEWAY MODULE (GWM) SELF-TEST 
    • Using a scan tool, perform the GWM  self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    1. Yes  : REFER to: COMMUNICATIONS NETWORK .
    2. No  : GO to C4 
  4. C4 PERFORM THE SPEEDOMETER ACTIVE COMMAND USING A SCAN TOOL 
    • Enter the following diagnostic mode on the scan tool: IPC  DataLogger.
    • Select the IPC  speedometer (SPDOMETER) Parameter Identification (PID).
    • Command the speedometer on and off while monitoring the speedometer.

    Does the speed begin at 0 km/h (0 mph) move to 193 km/h (120 mph) and return to 0 km/h (0 mph)? 

    1. Yes  : DIAGNOSE all ABS  module Diagnostic Trouble Codes (DTCs).

      REFER to: ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .

    2. No  : INSTALL a new IPC  .

      REFER to: Instrument Panel Cluster (IPC) .

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