Commercial Service Tool

PrecautionDiagnosis system (audio unit)
Diagnosis Description
Self-diagnosis mode can perform the following items.
Versions display
Channel check diagnosis
Key check diagnosis
AV communication diagnosis
VERSIONS DISPLAY FUNCTION
Turn ignition switch ON.
Turn the audio unit off.
While pressing "1" button, turn vol ...
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.CHECK SYMPTOM
Check the malfunction symptoms by performing the following items.
Interview the customer to obtain the malfunction information (conditions
and environment when the malfunction
occurred).
Check the symptom.
2.SELF-DIAGNOS ...
Power supply routing circuit
Wiring Diagram -Battery Power Supply -
Wiring Diagram -Accessory Power Supply -
Wiring Diagram -Ignition Power Supply -
Fuse
If fuse is blown, be sure to eliminate cause of malfunction before
installing new fuse.
U ...