Toyota Tundra Service Manual: 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 Code

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 ACC, 1 or more times, the radio and display receiver assembly cannot 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:

When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE

1.

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

(a) Disconnect the J140 radio and display receiver assembly connector.

(b) Disconnect the J28 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J140-3 (CNH1) - J28-18 (MSCH)

Always

Below 1 Ω

J140-4 (CNL1) - J28-19 (MSCL)

Always

Below 1 Ω

J140-3 (CNH1) - Body ground

Always

10 kΩ or higher

J140-4 (CNL1) - Body ground

Always

10 kΩ or higher

J140-3 (CNH1) - J140-4 (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

J140-3 (CNH1) - Body ground

Always

Below 1 V

J140-4 (CNL1) - Body ground

Always

Below 1 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

18 (MSCH) - 19 (MSCL)

Always

108 to 132 Ω

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly.

for Column Shift Type: See page

for Floor Shift Type: 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

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

A

4.

CHECK COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly.

See page

(b) Clear the DTCs.

See page

(c) Check for DTCs.

See page

OK:

No DTCs are output.

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

A

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    AV Signal Stoppage (Low Battery Voltage) (B158F)

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