Toyota CH-R Service Manual: 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.

    Click here

PROCEDURE

1.

CHECK SPEAKER (OPERATION CHECK)

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

Click here

(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.

B

GO TO STEP 6

A

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.

(c) Disconnect the F85 and F86 front No. 2 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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

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

Click here

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

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

4.

INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver).

Click here

(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))

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

5.

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK:

Malfunction disappears.

OK

END

NG

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.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

Click here

(b) Inspect the rear speaker assembly.

Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR SPEAKER ASSEMBLY

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