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Speedometer and/or Odometer Inaccurate or Inoperative

Speedometer and/or Odometer Inaccurate or Inoperative

Step Action Value(s) Yes No
Schematic Reference: Instrument Cluster Schematics 
1 Did you perform the Vehicle Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Raise the vehicles drive wheels. Refer to Lifting and Jacking the Vehicle .
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter in the engine control module (ECM) Engine Data 1 data list or powertrain control module (PCM) Engine Data list.
Does the Vehicle Speed Sensor parameter match the speedometer display?		 - Go to Step 3  Go to Step 4 
3 Does the odometer operate properly? - Go to Testing for Intermittent Conditions and Poor Connections Go to Step 12 
4
  1. Turn the ignition OFF.
  2. Disconnect the radio.
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter in the ECM/PCM Engine Data 1 data list.
Does the Vehicle Speed Sensor parameter match the speedometer display?		 - Go to Step 8  Go to Step 5 
5
  1. Turn the ignition OFF.
  2. Disconnect the ECM/PCM connector C2.
  3. Turn the ignition ON.
  4. Measure the voltage between the vehicle speed signal circuit and a good ground.
Does the voltage measure greater than the specified value?		 9.0 V Go to Step 7  Go to Step 6 
6 Test the vehicle speed signal circuit for the following between the instrument panel cluster (IPC) and the ECM/PCM.
  • An open
  • A high resistance
  • A short to ground

Refer to Circuit Testing and to Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 9 
7 Test the vehicle speed signal circuit for a short to voltage between the IPC and the ECM/PCM. Refer to Circuit Testing and to Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 10 
8 Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 11 
9 Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 12 
10 Inspect for poor connections at the harness connector of the ECM/PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 13 
11 Replace the radio. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 14  -
12 Replace the IPC. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 14  -
13 Replace the ECM/PCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 14  -
14 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 2 
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