Toyota CH-R Service Manual: Speaker Circuit

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / Speaker Circuit

DESCRIPTION

Thus sound cannot be heard from the speakers even if there is no malfunction in the DCM (telematics transceiver) or speakers.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
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PROCEDURE

1.	CHECK SPEAKER (OPERATION CHECK)

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

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

Not Operating Speaker	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 6

2.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the F132 radio and display receiver assembly connector.

(b) Disconnect the I1 and J1 front No. 1 speaker assembly connectors.

(d) Disconnect the F134 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F132-1 (FR+) - F134-2 (SPI+)	Always	Below 1 Ω
F132-6 (FR-) - F134-3 (SPI-)	Always	Below 1 Ω
F134-5 (SPO+) - F85-4 (TWR+)	Always	Below 1 Ω
F134-6 (SPO-) - F85-2 (TWR-)	Always	Below 1 Ω
F132-2 (FL+) - F86-4 (TWL+)	Always	Below 1 Ω
F132-7 (FL-) - F86-2 (TWL-)	Always	Below 1 Ω
I1-1 - F85-3 (+)	Always	Below 1 Ω
I1-2 - F85-1 (-)	Always	Below 1 Ω
J1-1 - F86-3 (+)	Always	Below 1 Ω
J1-2 - F86-1 (-)	Always	Below 1 Ω
F132-1 (FR+) or F134-2 (SPI+) - Body ground	Always	10 kΩ or higher
F132-6 (FR-) or F134-3 (SPI-) - Body ground	Always	10 kΩ or higher
F134-5 (SPO+) or F85-4 (TWR+) - Body ground	Always	10 kΩ or higher
F134-6 (SPO-) or F85-2 (TWR-) - Body ground	Always	10 kΩ or higher
F132-2 (FL+) or F86-4 (TWL+) - Body ground	Always	10 kΩ or higher
F132-7 (FL-) or F86-2 (TWL-) - Body ground	Always	10 kΩ or higher
I1-1 or F85-3 (+) - Body ground	Always	10 kΩ or higher
I1-2 or F85-1 (-) - Body ground	Always	10 kΩ or higher
J1-1 or F86-3 (+) - Body ground	Always	10 kΩ or higher
J1-2 or F86-1 (-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

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

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(b) Inspect the front No. 1 speaker assembly.

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REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

4.	INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
2 (SPI+) - 5 (SPO+)	Always	Below 1 Ω
3 (SPI-) - 6 (SPO-)	Always	Below 1 Ω
2 (SPI+) - 3 (SPI-)	Always	10 kΩ or higher
5 (SPO+) - 6 (SPO-)	Always	10 kΩ or higher
2 (SPI+) or 5 (SPO+) - Body ground	Always	10 kΩ or higher
3 (SPI-) or 6 (SPO-) - Body ground	Always	10 kΩ or higher

*a	Component without harness connected (DCM (Telematics Transceiver))

REPLACE DCM (TELEMATICS TRANSCEIVER)

5.	REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

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

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(b) Inspect the front No. 2 speaker assembly.

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OK:

Malfunction disappears.

END

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)

(a) Disconnect the F132 radio and display receiver assembly connector.

(b) Disconnect the K4 and L4 rear speaker assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F132-4 (RR+) - K4-1	Always	Below 1 Ω
F132-9 (RR-) - K4-2	Always	Below 1 Ω
F132-3 (RL+) - L4-1	Always	Below 1 Ω
F132-8 (RL-) - L4-2	Always	Below 1 Ω
F132-4 (RR+) or K4-1 - Body ground	Always	10 kΩ or higher
F132-9 (RR-) or K4-2 - Body ground	Always	10 kΩ or higher
F132-3 (RL+) or L4-1 - Body ground	Always	10 kΩ or higher
F132-8 (RL-) or L4-2 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

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(b) Inspect the rear speaker assembly.

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PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE REAR SPEAKER ASSEMBLY

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