Circuit Description
The instrument panel cluster (IPC) monitors the Tire Press Reset switch, w/Systems Monitor, or the Driver Information Center (DIC) Reset switch signal circuit, w/DIC. If the IPC detects a ground on either reset switch signal circuit for more than a predetermined amount of time, a malfunction is detected.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | Ignition voltage is 10.5-14.7 |
Conditions for Setting the DTC
The IPC detects a ground on the Tire Press Reset switch signal circuit, or the DIC Reset switch signal circuit for more than 15 continuous seconds.
Action Taken When the DTC Sets
| • | A DTC B2818 is stored in memory. |
| • | The IPC ignores the reset switch signal circuit input. |
Conditions for Clearing the MIL/DTC
| • | A current DTC will clear on the next consecutive malfunction free ignition cycle. |
| • | A history DTC will clear after 100 consecutive malfunction free ignition cycles. |
| • | Using a scan tool |
Diagnostic Aids
The IPC disables the reset switch input when a malfunction is detected making the switch status unknown when viewing the reset switch parameter on the scan tool. If an intermittent malfunction is suspected, cycle the ignition after repositioning wires and connectors to verify correct switch status.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference : Tire Pressure Monitoring System Schematics | ||||
1 | Did you perform the TPM Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool display DTC B2818 as current? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
Does the scan tool display OFF? | -- | Go to Step 6 | Go to Step 4 | |
4 | Test the signal circuit of the reset switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 5 |
5 | Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | -- | Go to Step 7 | -- |
6 | Replace the reset switch. Refer to Driver Information Display Switch Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | -- | Go to Step 7 | -- |
7 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
