Audio Video. Dtc 74-40 Short In Speaker Circuit

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200

Audio Video. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)

INSPECT REAR SPEAKER SET

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)

DTC 74-40 Short in Speaker Circuit

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
74-40	Short is detected in the speaker output circuit.	Harness or connector Speaker Stereo component amplifier assembly

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).
Dtc
74-40 Short In Speaker Circuit

INSPECTION PROCEDURE

HINT:

After the inspection is completed, clear the DTCs.

1.CHECK DTC

Disconnect the F3 and F52 amplifier connectors.

Clear the DTCs.

Check if DTC 74-40 is output.
OK:
DTC 74-40 is not output.

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (Click here)

OK

2.CHECK DTC

Reconnect the F52 amplifier connector.

Clear the DTCs.

Check if DTC 74-40 is output.
OK:
DTC 74-40 is not output.

Go to step 6

OK

3.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)

Disconnect the F3 amplifier connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F3-8 (CTR+) - Body ground	Always	10 kΩ or higher
F3-7 (CTR-) - Body ground	Always	10 kΩ or higher
F3-1 (WFL+) - Body ground	Always	10 kΩ or higher
F3-5 (WFL-) - Body ground	Always	10 kΩ or higher
F3-2 (WFR+) - Body ground	Always	10 kΩ or higher
F3-6 (WFR-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Disconnect the I10 and I1 speaker connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
Always
3 Ω
Text in Illustration
*1
Component without harness connected
(Front No. 1 Speaker)

Text in Illustration
*1	Component without harness connected (Front No. 1 Speaker)

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (Click here)

OK

5.INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

Disconnect the F6 speaker connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
Always
6 Ω
Text in Illustration
*1
Component without harness connected
(Front No. 4 Speaker)

Text in Illustration
*1	Component without harness connected (Front No. 4 Speaker)

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY (Click here)

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (Click here)

6.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)

Disconnect the F52 amplifier connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F52-8 (FL-) - Body ground	Always	10 kΩ or higher
F52-3 (FL+) - Body ground	Always	10 kΩ or higher
F52-9 (FR-) - Body ground	Always	10 kΩ or higher
F52-10 (FR+) - Body ground	Always	10 kΩ or higher
F52-5 (RR+) - Body ground	Always	10 kΩ or higher
F52-12 (RR-) - Body ground	Always	10 kΩ or higher
F52-4 (RL+) - Body ground	Always	10 kΩ or higher
F52-11 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.INSPECT REAR SPEAKER SET

Disconnect the J17 and J15 speaker connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
Always
4 Ω
Text in Illustration
*1
Component without harness connected
(Rear Speaker Set)

Text in Illustration
*1	Component without harness connected (Rear Speaker Set)

REPLACE REAR SPEAKER SET (Click here)

OK

Go to step 9

8.INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

Disconnect the F8 and F7 speaker connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
Always
Below 1 Ω
3 - 4
Always
Below 1 Ω
2 - 4
Always
4 Ω
Text in Illustration
*1
Component without harness connected
(Front No. 2 Speaker)

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY (Click here)

OK

Go to step 10

9.INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

Disconnect the F14 and F13 speaker connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
Always
4 Ω
Text in Illustration
*1
Component without harness connected
(Front No. 3 Speaker)

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY (Click here)

OK

10.CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)

Disconnect the F8, F7, F14 and F13 speaker connectors.

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

Standard Resistance:
for LH:
Tester Connection
Condition
Specified Condition
F8-2 (TWL+) - F14-1
Always
Below 1 Ω
F8-4 (TWL-) - F14-2
F8-2 (TWL+) - Body ground
Always
10 kΩ or higher
F8-4 (TWL-) - Body ground
for RH:
Tester Connection
Condition
Specified Condition
F7-2 (TWR+) - F13-1
Always
Below 1 Ω
F7-4 (TWR-) - F13-2
F7-2 (TWR+) - Body ground
Always
10 kΩ or higher
F7-4 (TWR-) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (Click here)