Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ATVR
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 - 08/2019]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for Gasoline Model): B1324,B1325; Lost Communication with Meter; 2019 MY Avalon [04/2018 - 08/2019]

DTC

B1324

Lost Communication with Meter

DTC

B1325

Lost Communication with HUD

DESCRIPTION

These DTCs are stored when communication between the radio and display receiver assembly and combination meter assembly or headup display (meter mirror sub-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 power source circuit
  • Combination meter assembly
  • Radio and display receiver assembly
  • Harness or connector
  • No. 25 junction connector

B1325

Lost Communication with HUD

CAN reception error
  • Local bus communication line
  • Headup display (meter mirror sub-assembly) power source circuit
  • Headup display (meter mirror sub-assembly)
  • Radio and display receiver assembly
  • Harness or connector
  • No. 25 junction 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 Navigation 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 and B1325 are not output

A

DTC B1324 and B1325 are output

B

DTC B1324 is output

C

DTC B1325 is output

D
A

USE SIMULATION METHOD TO CHECK

C

GO TO STEP 11

D

GO TO STEP 16

B

2.

CHECK LOCAL BUS

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-9 - G93-20

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

Result

Proceed to

OK

A

NG (Below 54 Ω)

B

NG (70 Ω or higher)

C
A

USE SIMULATION METHOD TO CHECK

C

GO TO STEP 9

B

3.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-9 - G93-20

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
NG

GO TO STEP 8

OK

4.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-10 - G93-21

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
NG

GO TO STEP 7

OK

5.

CHECK HARNESS AND CONNECTOR (HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-11 - G93-22

Cable disconnected from negative (-) battery terminal

200 Ω or higher
OK

REPLACE NO. 25 JUNCTION CONNECTOR
NG

6.

CHECK HARNESS AND CONNECTOR (HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the H1 headup display (meter mirror sub-assembly) connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-14 (TX+) - H1-15 (TX-)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω
OK

REPLACE HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G16 combination meter assembly connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G16-36 (TX+) - G16-37 (TX-)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G2 radio and display receiver assembly connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-5 (CNH1) - G2-6 (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

9.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G2 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-5 (CNH1) - G2-6 (CNL1)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

10.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

(c) Connect the G2 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-9 - G93-20

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE NO. 25 JUNCTION CONNECTOR
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY POWER SOURCE)

(a) Disconnect the G16 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G16-21 (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

G16-40 (B) - Body ground

Always

11 to 14 V

G16-39 (IG+) - Body ground

Engine switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

(c) Connect the G16 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-10 - G93-21

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
NG

GO TO STEP 15

OK

13.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-9 - G93-20

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE NO. 25 JUNCTION CONNECTOR
NG

14.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G2 radio and display receiver assembly connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-5 (CNH1) - G2-6 (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

15.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G16 combination meter assembly connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G16-36 (TX+) - G16-37 (TX-)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.

CHECK HARNESS AND CONNECTOR (HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) POWER SOURCE)

(a) Disconnect the H1 headup display (meter mirror sub-assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-4 (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

H1-2 (B) - Body ground

Always

11 to 14 V

H1-1 (IG) - Body ground

Engine switch on (IG)

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

17.

CHECK HARNESS AND CONNECTOR (HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

(c) Connect the H1 headup display (meter mirror sub-assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-11 - G93-22

Cable disconnected from negative (-) battery terminal

200 Ω or higher
NG

GO TO STEP 20

OK

18.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G93-9 - G93-20

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE NO. 25 JUNCTION CONNECTOR
NG

19.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the G2 radio and display receiver assembly connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-5 (CNH1) - G2-6 (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

20.

CHECK HARNESS AND CONNECTOR (HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) - NO. 25 JUNCTION CONNECTOR)

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

(b) Disconnect the H1 headup display (meter mirror sub-assembly) connector.

(c) Connect the G93 No. 25 junction connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-14 (TX+) - H1-15 (TX-)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω
OK

REPLACE HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR