Stereo Component Amplifier Power Source Circuit: Procedure

CONFIRM MODEL

Choose the model to be inspected.

Result

Result	Proceed to
w/ "Bluetooth" Audio System	A
w/o "Bluetooth" Audio System	B

B → See step 4

A: Go to next step

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

Disconnect the L30 stereo component amplifier assembly connector.

Fig 1: Identifying L30 Stereo Component Amplifier Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the L31 stereo component amplifier assembly connector.

Fig 2: Identifying L31 Stereo Component Amplifier Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the L32 stereo component amplifier assembly connector.

Fig 3: Identifying L32 Stereo Component Amplifier Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
L30-6 (GND) - Body ground	Always	Below 1 Ω
L30-7 (GND2) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
L32-1 (+B) - L30-6 (GND)	Power switch off	11 to 14 V
L32-5 (+B2) - L30-6 (GND)	Power switch off	11 to 14 V
L31-12 (ACC) - L30-6 (GND)	Power switch on (ACC)	11 to 14 V

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 3

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

Disconnect the L107 stereo component amplifier assembly connector.

Fig 4: Identifying L107 Stereo Component Amplifier Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
L107-10 (GND) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
L107-5 (+B) - L107-10 (GND)	Power switch off	11 to 14 V
L107-12 (ACC) - L107-10 (GND)	Power switch on (ACC)	11 to 14 V

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

Measure the voltage according to the value(s) in the table below.

Fig 5: Identifying l107 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage

Tester Connection	Condition	Specified Condition
L107-9 (AMP+) - L107-10 (GND)	Power switch on (IG)	11 to 14 V

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

NG → See step 6

OK → See step 3

CHECK HARNESS AND CONNECTOR

Disconnect the L34 navigation receiver assembly connector.

Fig 6: Identifying L34 Navigation Receiver Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Fig 7: Identifying l107 Connector

Standard Resistance

Tester Connection	Condition	Specified Condition
L34-9 (AMP) - L107-9 (AMP+)	Always	Below 1 Ω
L34-9 (AMP) - Body ground	Always	10 kΩ or higher

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Navigation Receiver Assembly)
*2	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 7

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to REMOVAL