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.

Click here

(b) Inspect the rear speaker assembly.

Click here

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE REAR SPEAKER ASSEMBLY

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