Circuit Description
The body control module (BCM) monitors the heated seat control module status signal circuit for shorts to voltage.
The circuit starts at the BCM and travels to the instrument panel (I/P) fuse panel where the circuit splits and travels to the heated seat module, the driver and heated seat module, and the front passenger module.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2348 Front Seat Heater Disable Circuit High
Conditions for Running the DTC
| • | The ignition must be in the ON position. |
| • | The Load Shed system must be active. |
| • | This DTC shall not set during BCM programing and configuration changes. |
| • | This DTC shall not set if any communication codes are set. |
| • | This DTC shall not set if codes B1982 or B1983 are set. |
Conditions for Setting the DTC
The voltage of the heated seat control module status signal circuit, at the module, shall be greater than 5 volts for 1/2 second while the output is inactive.
Action Taken When the DTC Sets
The BCM sets a DTC and disables the heated seats until the next ignition cycle.
Conditions for Clearing the DTC
| • | The Load Shed system in not in an active state. |
| • | The ignition has been cycled from Off to Run. |
| • | A history DTC clears after 100 malfunction-free ignition cycles. |
| • | The BCM receives the clear code command from the scan tool. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics in Seats Connector End View Reference: Master Electrical Component List in Wiring Systems | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool indicate that DTC B2348 is current? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Is the voltage measured greater than the specified value? | 5 V | Go to Step 4 | Go to Step 6 |
4 |
Is the voltage measured greater than the specified value? | 5 V | Go to Step 5 | Go to Step 7 |
5 | Test the heated seat control module status signal circuit of the body control module (BCM) for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 8 |
6 | Inspect for poor connections at the harness connector of the heated seat module - driver. 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 12 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the heated seat module - front passenger. 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 12 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the BCM. 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 12 | Go to Step 11 |
9 | Replace the heated seat module - driver. Refer to Front Seat Heater Control Module Replacement in Seats. Did you complete the replacement? | -- | Go to Step 12 | -- |
10 | Replace the heated seat module - front passenger. Refer to Front Seat Heater Control Module Replacement in Seats. Did you complete the replacement? | -- | Go to Step 12 | -- |
11 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 12 | -- |
12 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
