Toyota CH-R Service Manual: 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, DCM (telematics transceiver)*1 or speakers.

  • *: w/ Manual (SOS) Switch

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream (w/ Manual (SOS) Switch).

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 (w/ Manual (SOS) Switch)

A

Front No. 1 speaker assembly or front No. 2 speaker assembly (w/o Manual (SOS) Switch)

B

Rear speaker assembly

C

HINT:

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

B

GO TO STEP 7

C

GO TO STEP 10

A

2.

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

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

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

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

(d) 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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

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

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

(b) Disconnect the F85 and F86 front No. 2 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

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

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

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

F134-2 (SPI+) - F134-5 (SPO+)

Always

Below 1 Ω

F134-3 (SPI-) - F134-6 (SPO-)

Always

Below 1 Ω

F134-2 (SPI+) - F134-3 (SPI-)

Always

10 kΩ or higher

F134-5 (SPO+) - F134-6 (SPO-)

Always

10 kΩ or higher

F134-2 (SPI+) or F134-5 (SPO+) - Body ground

Always

10 kΩ or higher

F134-3 (SPI-) or F134-6 (SPO-) - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(DCM (Telematics Transceiver))

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

5.

INSPECT 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

(c) Check that the malfunction disappears when a new or known good front No. 2 speaker assembly is installed.

OK:

Malfunction disappears.

OK

END

NG

6.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

7.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F132-1 (FR+) - F85-4 (TWR+)

Always

Below 1 Ω

F132-6 (FR-) - 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 F85-4 (TWR+) - Body ground

Always

10 kΩ or higher

F132-6 (FR-) 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

8.

INSPECT 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

(c) Check that the malfunction disappears when a new or known good front No. 2 speaker assembly is installed.

OK:

Malfunction disappears.

OK

END

NG

9.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

10.

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 L4 and K4 rear speaker assembly connectors.

(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

11.

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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