Toyota Venza: Speaker Circuit

Toyota Venza Service Manual / Audio / Video / Audio And Visual System / Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.

WIRING DIAGRAM

PROCEDURE

1.	CHECK SPEAKER (OPERATION CHECK)

(a) Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check (See page ).

(b) Perform the operation check above and determine the speaker that is not operating.

Result	Proceed to
Front No. 1 speaker assembly or front No. 2 speaker assembly	A
Rear speaker assembly	B

HINT:

If sound cannot be heard from any speaker, inspect all of them.

GO TO STEP 7

2.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the E4 radio and display receiver assembly connector.

(b) Disconnect the E28 and E29 front No. 2 speaker assembly connectors.

(c) Measure the resistance between each of the front No. 2 speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E4-1 (FR+) - E28-2 (TWR+)	Always	Below 1 Ω
E4-5 (FR-) - E28-4 (TWR-)	Always	Below 1 Ω
E4-2 (FL+) - E29-2 (TWL+)	Always	Below 1 Ω
E4-6 (FL-) - E29-4 (TWL-)	Always	Below 1 Ω

(d) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E4-1 (FR+) - Body ground	Always	10 kΩ or higher
E4-5 (FR-) - Body ground	Always	10 kΩ or higher
E4-2 (FL+) - Body ground	Always	10 kΩ or higher
E4-6 (FL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the E28 and E29 front No. 2 speaker assembly connectors.

(b) Disconnect the H1 and I1 front No. 1 speaker assembly connectors.

(c) Measure the resistance between each of the front No. 1 speaker assemblies and the front No. 2 speaker assemblies to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E28-1 (+) - H1-1	Always	Below 1 Ω
E28-3 (-) - H1-2	Always	Below 1 Ω
E29-1 (+) - I1-1	Always	Below 1 Ω
E29-3 (-) - I1-2	Always	Below 1 Ω

(d) Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E28-1 (+) - Body ground	Always	10 kΩ or higher
E28-3 (-) - Body ground	Always	10 kΩ or higher
E29-1 (+) - Body ground	Always	10 kΩ or higher
E29-3 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove the front No. 2 speaker assembly (See Page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
2 (TWR+) - 4 (TWR-)	Always	10 kΩ or higher
3 (-) - 4 (TWR-)	Always	Below 1 Ω
1 (+) - 2 (TWR+)	Always	Below 1 Ω
2 (TWL+) - 4 (TWL-)	Always	10 kΩ or higher
3 (-) - 4 (TWL-)	Always	Below 1 Ω
1 (+) - 2 (TWL+)	Always	Below 1 Ω

Text in Illustration

for RH

for LH

Component without harness connected

(Front No. 2 Speaker Assembly)

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

5.	REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

(a) Check that the malfunction disappears when a new or known good speaker is installed (See page ).

OK:

Malfunction disappears.

HINT:

Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
Perform the above inspection on both the LH and RH side.

END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

6.	INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove the front No. 1 speaker assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Always	3.2 to 4.8 Ω

Text in Illustration

*a	Component without harness connected (Front No. 1 Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVERASSEMBLY - REAR SPEAKER ASSEMBLY)

(a) Disconnect the E5 radio and display receiver assembly connector.

(b) Disconnect the J4 and K4 rear speaker assembly connectors.

(c) Measure the resistance between each of the rear speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E5-1 (RR+) - J4-1	Always	Below 1 Ω
E5-3 (RR-) - J4-2	Always	Below 1 Ω
E5-2 (RL+) - K4-1	Always	Below 1 Ω
E5-6 (RL-) - K4-2	Always	Below 1 Ω

(d) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E5-1 (RR+) - Body ground	Always	10 kΩ or higher
E5-3 (RR-) - Body ground	Always	10 kΩ or higher
E5-2 (RL+) - Body ground	Always	10 kΩ or higher
E5-6 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly (See Page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Always	3.2 to 4.8 Ω

Text in Illustration

*a	Component without harness connected (Rear Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE REAR SPEAKER ASSEMBLY

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