Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026XMV
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): B1324; Lost Communication with Meter; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

DTC

B1324

Lost Communication with Meter

DESCRIPTION

These DTCs are stored when communication between the radio and display receiver assembly and combination meter assembly is not possible.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1324

Lost Communication with Meter

CAN reception error
  • Local bus communication line
  • Combination meter assembly power source circuit
  • Combination meter assembly
  • Radio and display receiver assembly
  • Harness or connector

HINT:

The radio and display receiver assembly is the master unit.

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.
  • 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.
  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK DTC

(a) Check for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

Result

Proceed to

DTC B1324 is not output

A

DTC B1324 is output

B
A

USE SIMULATION METHOD TO CHECK

B

2.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY POWER SOURCE)

(a) Disconnect the I4 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I4-23 (ES) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I4-22 (B) - Body ground

Always

11 to 14 V

I4-38 (IG+) - Body ground

Ignition switch ON

11 to 14 V

Result

Proceed to

OK (w/ Headup Display System)

A

OK (w/o Headup Display System)

B

NG

C
B

GO TO STEP 7

C

REPAIR OR REPLACE HARNESS OR CONNECTOR
A

3.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I108 No. 2 junction connector.

(c) Connect the I4 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I108-3 - I108-14

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
NG

GO TO STEP 6

OK

4.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I108 No. 2 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I108-1 - I108-12

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE NO. 2 JUNCTION CONNECTOR
NG

5.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I56 radio and display receiver assembly connector.

(c) Connect the I108 No. 2 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I56-5 (CNH1) - I56-6 (CNL1)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I4 combination meter assembly connector.

(c) Connect the I108 No. 2 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I4-27 (MSCH) - I4-10 (MSCL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK HARNESS AND CONNECTOR

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I4 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I4-27 (MSCH) - I4-10 (MSCL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

8.

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

(a) Disconnect the I56 radio and display receiver assembly connector.

(b) Disconnect the I4 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I56-5 (CNH1) - I4-27 (MSCH)

Always

Below 1 Ω

I56-6 (CNL1) - I4-10 (MSCL)

Always

Below 1 Ω

I56-5 (CNH1) or I4-27 (MSCH) - Body ground

Always

10 kΩ or higher

I56-6 (CNL1) or I4-10 (MSCL) - Body ground

Always

10 kΩ or higher
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR