DTC B1A89:42 [CONNECTIVITY MASTER UNIT]

id0902n7106000

Description

Tuner and amp unit (TAU) internal malfunction

Detection condition

•  The connectivity master unit (CMU) detects an DAB module malfunction in the tuner and amp unit (TAU) with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

•  Tuner and amp unit (TAU) malfunction

―  DAB module malfunction

System wiring diagram

Not applicable

Description	Tuner and amp unit (TAU) internal malfunction
Detection condition	• The connectivity master unit (CMU) detects an DAB module malfunction in the tuner and amp unit (TAU) with the ignition switched ON (engine off or on).
Fail-safe	Not applicable
Possible cause	• Tuner and amp unit (TAU) malfunction ― DAB module malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY IF MALFUNCTIONING LOCATION IS TUNER AND AMP UNIT (TAU) DEPENDING ON REPEATABILITY • Clear the DTC for the connectivity master unit (CMU) using the M-MDS. (See CLEARING DTC [CONNECTIVITY MASTER UNIT].) • Switch the ignition ON (engine off or on) and wait for 7 s or more. • Retrieve the connectivity master unit (CMU) DTCs using the M-MDS. (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].) • Is the same DTC displayed?	Yes	Replace the tuner and amp unit (TAU), then go to the next step. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.)
1		No	Go to the next step.
2	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CONNECTIVITY MASTER UNIT].)
2		No	DTC troubleshooting completed.