Toyota Tacoma 2015-2018 Service Manual: Lost Communication with Meter (B1324)

Toyota Tacoma 2015-2018 Service Manual / Audio / Video / Audio And Visual System / 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.	DTC Detection Condition	Trouble Area
B1324	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 turned to ACC, 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

PROCEDURE

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

(a) Disconnect the R32 radio and display receiver assembly connector.

(b) Disconnect the C9 combination meter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R32-3 (CNH1) - C9-4 (MSCH)	Always	Below 1 Ω
R32-4 (CNL1) - C9-5 (MSCL)	Always	Below 1 Ω
R32-3 (CNH1) - Body ground	Always	10 kΩ or higher
R32-4 (CNL1) - Body ground	Always	10 kΩ or higher
R32-3 (CNH1) - R32-4 (CNL1)	Always	10 kΩ or higher

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
R32-3 (CNH1) - Body ground	Always	Below 1 V
R32-4 (CNL1) - Body ground	Always	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT COMBINATION METER ASSEMBLY

(a) Remove the combination meter assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (MSCH) - 5 (MSCL)	Always	108 to 132 Ω

Text in Illustration

*a	Component without harness connected (Combination Meter Assembly)

REPLACE COMBINATION METER ASSEMBLY

3.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 (CNH1) - 4 (CNL1)	Always	108 to 132 Ω

Text in Illustration

*a	Component without harness connected (Radio and Display Receiver Assembly)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

4.	REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly with a new or known good one (See page (b) Clear the DTCs (See page ). ).

(b) Clear the DTCs (See page (c) Recheck for DTCs and check that no DTCs are output. ).

OK:

No DTCs are output.

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

5.	CHECK METER / GAUGE SYSTEM

(a) Turn the ignition switch to ON and wait 30 seconds.

(b) Operate the steering pad switch assembly and check that the audio tab is displayed on the multi-information display in the combination meter assembly and the audio system can be operated normally.

OK:

Audio system returns to normal.

END

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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