Circuit Description
The instrument panel cluster (IPC) receives vehicle speed information from the powertrain control module (PCM). The IPC receives a 4000 pulse-per mile vehicle speed sensor (VSS) input over a dedicated input from the PCM. The PCM is responsible for processing the VSS data and sending it to the IPC. The IPC monitors the VSS output information sent from the PCM for an out of range condition.
Conditions for Setting the DTC
| • | The IPC detects that the vehicle speed is over 322 km/h (200 mph). |
| • | The above condition must be present for 1 second. |
Action Taken When the DTC Sets
| • | The IPC stores DTC B0516. |
| • | The IPC displays vehicle speed at 322 km/h (200 mph). |
Conditions for Clearing the DTC
| • | The IPC detects that the vehicle speed is less than 322 km/h (200 mph). |
| • | A history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | The code is cleared using on-board diagnostics. |
| • | The IPC receives a clear code command from the scan tool. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction to occur: |
| - | The PCM is unable to process the correct vehicle speed data sent from the VSS. |
| - | Intermittent or erratic VSS operation. |
| • | Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | ||||
1 | Did you perform the IPC Diagnostic System Check? | -- | Go to Step 2 | |
| -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | |
3 | Test the VSS circuit for an open, short to voltage, or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 6 | Go to Step 4 |
4 | 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 6 | Go to Step 5 |
5 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
