u1192 lost communication with lower switch bank

OBD2 Code: U1192

Description: Lost Communication with Lower Switch Bank

Definition: This code indicates that the vehicle’s control module has lost communication with the lower switch bank, which may include switches for functions such as windows, mirrors, or other auxiliary controls. The issue could be due to wiring problems, a faulty switch bank, or a malfunctioning control module.

U1192 – Lost Communication with Lower Switch Bank
– Severity: Moderate

Common Causes

U1192 – Lost Communication with Lower Switch Bank

Common Causes:

• Faulty lower switch bank module
• Wiring or connection issues between the lower switch bank module and the vehicle’s main computer
• Interference from other electronic devices causing communication disruption
• Software or programming issues within the lower switch bank module

 

Common Misdiagnosis

Lost Communication with Lower Switch Bank – Common Misdiagnosis: Faulty switch bank assumed to be a wiring issue or defective control module.

 

Common Diagnostic Steps

Lost Communication with Lower Switch Bank

• Check for any other stored codes that might indicate a related issue.
• Inspect the wiring and connectors between the lower switch bank and the control module for damage or corrosion.
• Test the power and ground circuits to ensure they are functioning properly.
• Use a scan tool to check for communication on the network bus where the lower switch bank is connected.
• If possible, perform a continuity test on the communication lines between modules.
• Verify that all software updates have been applied to relevant control modules.
• If no issues are found, consider replacing the lower switch bank or associated control module as a last resort after confirming it is faulty.