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

Toyota Tacoma (2015-2018) Service Manual / Navigation / Multi Info Display / Navigation System / Lost Communication with Meter (B1324)

DESCRIPTION

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

DTC No.	DTC Detection Condition	Trouble Area
B1324	After the navigation receiver assembly receives a registration information signal, which is sent by the combination meter assembly when the ignition switch is ACC, 1 or more times, the navigation receiver assembly cannot receive the signal for 30 seconds or more.	Combination meter assembly Navigation receiver assembly Harness or connector

WIRING DIAGRAM

PROCEDURE

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

(a) Disconnect the N26 navigation receiver assembly connector.

(b) Disconnect the C9 combination meter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
N26-3 (CNH1) - C9-4 (MSCH)	Always	Below 1 Ω
N26-4 (CNL1) - C9-5 (MSCL)	Always	Below 1 Ω
N26-3 (CNH1) - Body ground	Always	10 kΩ or higher
N26-4 (CNL1) - Body ground	Always	10 kΩ or higher
N26-3 (CNH1) - N26-4 (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
N26-3 (CNH1) - Body ground	Always	Below 1 V
N26-4 (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 NAVIGATION RECEIVER ASSEMBLY

(a) Remove the navigation 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 (Navigation Receiver Assembly)

REPLACE NAVIGATION 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 NAVIGATION 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 NAVIGATION RECEIVER ASSEMBLY

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