Removal and installation
Diagnosis and repair workflowAudio system
System Diagram
System Description
AUDIO SYSTEM
The audio system consists of the following components
Audio unit
Display unit
Bluetooth control unit
Window antenna
BOSE speaker amp.
Steering wheel audio control switches
Front door speakers
Tweeters
Center speaker
Rear door ...
TCM branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and
loose connection (unit side and connector
side).
TCM
Harness connector F1
Harness con ...
B260A ignition relay
Description
BCM turns ON the following relays to ignition power supply to each ECU when
the ignition switch is turned
ON.
Ignition relay-1 (inside IPDM E/R)
Ignition relay-2 (inside fuse block (J/B))
Front blower motor relay
BCM checks any ignition relay ON request for consistency wi ...