Toyota CH-R Service Manual: Speaker Output Short (B15C3)

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / Speaker Output Short (B15C3)

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B15C3	Speaker Output Short	A short is detected in the speaker output circuit	Harness or connector Speaker DCM (telematics transceiver)

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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When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND)

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

(b) Disconnect the F86 front No. 2 speaker assembly connector.

(d) Disconnect the K4 and L4 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
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
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
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

2.	CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY RH OR DCM (TELEMATICS TRANSCEIVER) - BODY GROUND)

(a) Disconnect the F85 front No. 2 speaker assembly RH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F85-4 (TWR+) or F134-5 (SPO+) - Body ground	Always	10 kΩ or higher
F85-2 (TWR-) or F134-6 (SPO-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	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)

4.	CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND)

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F85-3 (+) or I1-1 - Body ground	Always	10 kΩ or higher
F85-1 (-) or I1-2 - Body ground	Always	10 kΩ or higher
F86-3 (+) or J1-1 - Body ground	Always	10 kΩ or higher
F86-1 (-) or J1-2 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	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

6.	INSPECT 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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Body Electrical > Navigation System > Clear DTCs

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

END

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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REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE REAR SPEAKER ASSEMBLY

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Toyota CH-R Service Manual: Speaker Output Short (B15C3)

Sending Malfunction (Navigation to APGS) (U0073,U0100,U0129,U0140,U0155,U0164,U0198)

Telematics Transceiver Disconnected (B15DB)

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