Buick Regal: DTC B097F

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B097F 01

Transmission Tow Mode Indicator Circuit Short to Battery

Diagnostic Fault Information

1. Tour Mode Indicator Malfunction

Circuit/System Description

The Tour Mode Switch and tour mode LED are combined into the S48E Multifunction Switch - Center Console. The body control module (BCM) monitors the status of the Tour Mode Switch. When the tour mode switch is pressed, the BCM will request the Suspension Control Module, Transmission Control Module (TCM) and Engine Control Module (ECM) via serial data to control the vehicle ride characteristic according to the selected mode. The BCM will command the tour mode LED ON to notify the driver of the selected mode.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The BCM detects a short to voltage on the indicator control circuit.

Action Taken When the DTC Sets

DTC B097F 01 is stored in the BCM memory.

Conditions for Clearing the DTC

The BCM no longer detects a malfunction.

Reference Information

Schematic Reference

Electronic Suspension Control Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Description and Operation

Driver Information Center (DIC) Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Observe the tour mode LED while pressing and releasing the Tour Mode Switch. Verify the tour mode LED turns ON and OFF.

• If LED does not turn ON and OFF

Proceed to Circuit/System Testing.

• Go to next step: If LED turns ON and OFF

2. All OK.

Circuit/System Testing

NOTE: Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the X3 harness connector at the K9 Body Control Module and the S48E Multifunction Switch - Center Console. Ignition ON.

2. Test for less than 1 V between the signal circuit terminal 14 and ground.

• If 1 V or greater

Repair the short to voltage in the circuit.

• Go to next step: If less than 1 V

3. Test for infinite resistance between the signal circuit terminal 14 and ground.

• If less than infinite resistance

Repair the short to ground in the circuit.

• Go to next step: If infinite resistance

4. Test for less than 2 Ω in the signal circuit end to end.

• If 2 Ω or greater

Repair the open/high resistance in the circuit.

• Go to next step: If less than 2 Ω

5. Ignition OFF, connect the harness connector X3 at the K9 Body Control Module. Ignition ON.

6. Test for less than 1V between the control circuit terminal 18 and ground.

• If 1 V or greater

1. Ignition OFF, disconnect the harness connector X5 at the K9 Body Control Module.
2. Test for less than 1V between the control circuit and ground.
   • If 1 V or greater, repair the short to voltage in the circuit.
   • If less than 1V, replace the K9 Body Control Module.

• Go to next step: If less than 1 V

7. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground.

• If the test lamp does not illuminate and the circuit fuse is OK

1. Ignition OFF.
2. Test for less than 2 Ω in the B+ circuit end to end.
   • If 2 Ω or greater, repair the open/high resistance in the circuit.
   • If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse.

• If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.
2. Test for infinite resistance between the B+ circuit and ground.
   • If less than infinite resistance, repair the short to ground on the circuit.
   • If infinite resistance, K9 Body Control Module.

• Go to next step: If the test lamp illuminates

8. Connect a test lamp between the control circuit terminal 15 and B+, ignition ON.

9. Verify the test lamp turns ON and OFF when commanding the Tour Switch Indicator Active and Inactive with a scan tool.

• If the test lamp is always ON

1. Ignition OFF, disconnect the X5 harness connector at the K9 Body Control Module, ignition ON.
2. Test for infinite resistance between the control circuit and ground.
   • If less than infinite resistance, repair the short to ground on the circuit.
   • If infinite resistance, replace the K9 Body Control Module

• If the test lamp is always OFF

1. Ignition OFF, disconnect the X5 harness connector at the K9 Body Control Module.
2. Test for less than 2 Ω in the control circuit end to end.
   • If 2 Ω or greater, repair the open/high resistance in the control circuit.
   • If less than 2 Ω, replace the K9 Body Control Module.

• Go to next step: If the test lamp turns ON and OFF

10. Test or replace the S48E Multifunction Switch - Center Console.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• Displays and Gauges Component Replacement Reference
• Control Module References for control module replacement, programming, and setup

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