U0186-LOST COMMUNICATION WITH AUDIO AMPLIFIER

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
Continuously when the ignition is on.

The battery voltage is between 10 and 16 volts.

Ignition Off Draw (IOD) fused installed.

Totally Integrated Power Module (TIPM) is configured correctly.
Set Condition:
Bus messages not received from the Audio Amplifier for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
AMPLIFIER POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
AMPLIFIER
MODULE THAT SET THIS DTC

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding.

1.	Turn the ignition on.

2.	With the scan tool, read the active DTCs.

Is this DTC active?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) and perform the U0186-Lost Communication with Audio Amplifier diagnostic procedure.

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.