B1193

Fault symptom
The horn does not work
The LED flashes during the delay period

Conditions
Open-circuit registers diagnostic trouble code

Action
1 Check fuse 23
2 Check to see if the horn works
Connect the scan tool.
Select "ACTIVATE".
Select "HORN".
Select "ON".
If the horn functions correctly, proceed to point 6.
If not, proceed to point 3.

3 Check the voltage supply to the horn
Disconnect the horn.
Connect the test lamp in the two 1 pin horn connectors.
Repeat scan tool command as point 2.
When "ON" is selected, the test lamp should light.
If the test lamp lights, change the horn.
If not, proceed to point 4.






4 Check the horn + 30 supply
Connect the test lamp between the 1 pin horn connector with the red lead and a safe grounding point.
The test lamp should light.
If the test lamp does not light, conduct a continuity test and take action on the cable assembly between the connector, pin 1 and fuse 23.
If the test lamp lights, proceed to point 5.

5 Check the horn grounding
Control module, pin 11 grounds the horn when it is activated.
Conduct a continuity test on the cable assembly between the 1 pin horn connector, with the black lead and the control module, pin 11. The resistance should be < 1 Ohm.
If the resistance is incorrect, take action on the cable assembly.
If the resistance is correct, proceed to point 6.

6 Check if a diagnostic trouble code is registered
Erase the diagnostic trouble code, test drive the car and check to see if the diagnostic trouble code is re-registered.
If the diagnostic trouble code is registered, proceed to "Before Control Module Replacement".
If the diagnostic trouble code is not registered, the action taken is correct or the fault is of intermittent type.