Horn Switch Stuck - Without EVIC

B2339 - Horn Switch Stuck - Without EVIC

For a complete wiring diagram, refer to.

• When Monitored: Continuously.

• Set Condition: When the cluster senses the horn switch input for over 30 seconds, this code will set.






Test Step 1 - Test For Intermittent Condition

• With the scan tool, record and erase DTCs.

• Operate the horn switch several times.

• Cycle the ignition from on to off 3 times.

• Turn the ignition ON.

• With the scan tool, read DTCs.

Does the scan tool display B2339 - Horn Switch Stuck - Without EVIC?

Yes

• Go to Test Step 2 => [ Test Step 2 - Horn Switch Shorted ]

No

• The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior

Test Step 2 - Horn Switch Shorted


To avoid personal injury or death, turn the ignition OFF, disconnect the battery and wait two minutes before proceeding.

• Disconnect the horn switch connector.

• With the scan tool, erase DTCs.

• Cycle the ignition from on to off 3 times.

• Turn the ignition ON.

• With the scan tool, read DTCs.

Does the scan tool display Horn Switch Stuck?

Yes

• Go to Test Step 3 => [ Test Step 3 - Steering Control Module Shorted ]

No

• Replace the horn switch.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior

Test Step 3 - Steering Control Module Shorted






• Disconnect the steering control module C2 connector.

• With the scan tool, erase DTCs.

• Cycle the ignition from on to off 3 times.

• Turn the ignition ON.

• With the scan tool, read DTCs.

Does the scan tool display Horn Switch Stuck?

Yes

• Go to Test Step 4 => [ Test Step 4 - Horn Switch Sense Shorted to Radio Control MUX Return ]

No

• Inspect the steering control module horn switch pigtail harness for a shorted condition, if OK replace the steering control module.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior

Test Step 4 - Horn Switch Sense Shorted to Radio Control MUX Return






• Turn the ignition OFF.

• Disconnect the cluster C2 and C3 connector.

• Measure the resistance between horn switch sense and the radio control MUX return circuit.

Is the resistance below 1000.0 ohms?

Yes

• Repair the horn switch sense circuit for a short to radio control MUX return circuit.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior

No

• Go to Test Step 5 => [ Test Step 5 - Horn Switch Sense Shorted to Ground ]

Test Step 5 - Horn Switch Sense Shorted to Ground






• Measure the horn switch sense circuit to ground.

Is the resistance below 1000.0 ohms?

Yes

• Repair the horn switch sense circuit for a short to ground.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior

No

• Replace the cluster.

• Perform Body Verification Test. Refer to => Non
- DTC Based Diagnostics. Body Interior