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DTC Description
 
 
DTC DETECTION LOGIC
DTC No. M.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
B1309-12 AV control unit
(AV control unit)
Diagnosis conditionWhen ignition switch is ON.
Signal (terminal)Amp. ON signal circuit between AV control unit and BOSE amp.
ThresholdShort to power supply circuit
Diagnosis delay time30 seconds or more
 
 
POSSIBLE CAUSE
Amp. ON signal circuit
 
 
FAIL-SAFE
No sound from the speakers
 
 
CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With M.U.T.-III SE
  1. Turn ignition switch ON.
  2. Turn ignition switch OFF and wait for 4 minutes.
  3. Turn ignition switch ON and wait at least 1 minute or more.
  4. Select “Self Diagnostic Result” mode of “MULTI AV” using M.U.T.-III SE.
  5. Check DTC.
Is DTC B1309-12 detected?
Proceed to Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END