Toyota CH-R Service Manual: Lost Communication with Meter (B1324)

Toyota CH-R Service Manual / Audio / Video / Audio And Visual System(for Radio And Display Type) / Lost Communication with Meter (B1324)

DESCRIPTION

This DTC is stored when a communication error occurs between the radio and display receiver assembly and combination meter assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1324	Lost Communication with Meter	After the radio and display receiver assembly receives a registration information signal, which is sent by the combination meter assembly when the ignition switch is ON, 1 or more times, the radio and display receiver assembly does not receive the signal for 30 seconds or more	Combination meter assembly Radio and display receiver assembly Harness or connector

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 Audio and Visual 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 is stored.
- The radio and display receiver assembly or navigation ECU may not operate normally.

PROCEDURE

1.	CHECK DTC (METER / GAUGE SYSTEM)

(a) Clear the DTCs.

Body Electrical > Combination Meter > Trouble Codes

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

Body Electrical > Combination Meter > Clear DTCs

OK:

No DTCs are output.

GO TO METER / GAUGE SYSTEM

2.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)

(a) Disconnect the F131 radio and display receiver assembly connector.

(b) Disconnect the F4 combination meter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F131-5 (CNH1) - F4-36 (MSCH)	Always	Below 1 Ω
F131-6 (CNL1) - F4-37 (MSCL)	Always	Below 1 Ω
F131-5 (CNH1) - Body ground	Always	10 kΩ or higher
F131-6 (CNL1) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly.

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(b) Clear the DTCs.

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Body Electrical > Combination Meter > Trouble Codes

Body Electrical > Combination Meter > Clear DTCs

OK:

No DTCs are output.

END

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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Toyota CH-R Service Manual: Lost Communication with Meter (B1324)

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