LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2004 >> XLR >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Inaccurate or Inoperative

Speedometer and/or Odometer Inaccurate or Inoperative

Speedometer and/or Odometer Inaccurate or Inoperative

Step Action Value(s) Yes No
Schematic Reference: 
1 Did you perform the IPC Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter in the ECM Engine Data 1 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 in Wiring Systems Go to Step 18 
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 Engine Data 1 data list.
Does the Vehicle Speed Sensor parameter match the speedometer display?		 - Go to Step 10  Go to Step 5 
5
  1. Turn the ignition OFF.
  2. Disconnect the head up display (HUD).
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter.
Does the Vehicle Speed Sensor parameter match the speedometer display?		 - Go to Step 11  Go to Step 6 
6
  1. Turn the ignition OFF.
  2. Disconnect the rear object alarm detection module.
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor parameter in the Engine Data 1 data list.
Does the Vehicle Speed Sensor parameter match the speedometer display?		 - Go to Step 12  Go to Step 7 
7
  1. Turn the ignition OFF.
  2. Disconnect the ECM connector C1.
  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 9  Go to Step 8 
8 Test the vehicle speed signal circuit for an open, for a high resistance, or for a short to ground between the IPC and the ECM. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 13 
9 Test the vehicle speed signal circuit for a short to voltage between the IPC and the ECM. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 14 
10 Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 15 
11 Inspect for poor connections at the harness connector of the HUD. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 16 
12 Inspect for poor connections at the harness connector of the rear object alarm detection module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 17 
13 Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 18 
14 Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 20  Go to Step 19 
15 Replace the radio. Refer to Radio Replacement in Entertainment.
Did you complete the replacement?		 - Go to Step 20  -
16 Replace the HUD Refer to Head Up Display Replacement 
Did you complete the replacement?		 - Go to Step 20  -
17 Replace the rear object alarm detection module. Refer to Object Alarm Module Replacement in Rear Parking Assist.
Did you complete the replacement?		 - Go to Step 20  -
18 Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement .
Did you complete the replacement?		 - Go to Step 20  -
19
IMPORTANT: Program the replacement ECM.
Replace the ECM. Refer to Engine Control Module (ECM) Replacement in Engine Controls.Did you complete the replacement?		 - Go to Step 20  -
20 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 2 
scientia non olet · About LEMON Manuals