Schematic Reference: Instrument Cluster Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Install a scan tool.
2. Raise the vehicle 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

Does the odometer operate properly?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 15

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 9

Go to Step 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 10

Go to Step 6

1. Turn the ignition OFF.
2. Disconnect the engine control module (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 V

Go to Step 8

Go to Step 7

Test the vehicle speed signal circuit for an open, high resistance, or a short to ground between the instrument panel cluster (IPC) and the ECM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 11

Test the vehicle speed signal circuit for a short to voltage between the IPC and the ECM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 12

Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 13

Inspect for poor connections at the harness connector of the HUD. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 14

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 15

Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 16

Replace the radio. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 17

--

Replace the HUD. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 17

--

Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 17

--

Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 17

--

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2