Lexus ES manuals

Lexus ES: Operation Panel Disconnected (B15D9)

DESCRIPTION

The air conditioning control assembly and multi-display assembly are connected by an AVC-LAN communication line. When an AVC-LAN communication error occurs between the multi-display assembly and air conditioning control assembly, these DTCs will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15D9

Operation Panel Disconnected

A device that is listed in the AVC-LAN connected device record of the master unit is missing.

  • Air conditioning control assembly power source circuit
  • AVC-LAN circuit
  • Air conditioning control assembly
  • Multi-display assembly
  • Harness or connector

HINT:

The radio receiver assembly is the master unit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

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

PROCEDURE

1.

CHECK DTC

(a) If DTC B15D6 is output, perform troubleshooting for DTC B15D6 first.

Result

Proceed to

DTC B15D6 is not output.

A

DTC B15D6 is output.

B

B

GO TO DTC B15D6

A

2.

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Check for optional components.

(1) Check that optional components (including associated wiring) which generate radio waves are not installed.

Result

Proceed to

Optional components (including associated wiring) are installed.

A

Optional components (including associated wiring) are not installed.

B

HINT:

  • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
  • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.
B

GO TO STEP 5

A

3.

REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Remove optional components (including associated wiring).

NOTICE:

Do not remove optional components or associated wiring without the permission of the customer.

NEXT

4.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (COMMUNICATION MALFUNCTION DUE TO NOISE)

NG

5.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY POWER SOURCE)

(a) Disconnect the G23 air conditioning control assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G23-4 (E) - 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

G23-16 (+B) - Body ground

Power switch off

11 to 14 V

G23-7 (ACC) - Body ground

Power switch on (ACC)

11 to 14 V

G23-8 (IG+) - Body ground

Power switch on (IG)

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

(a) Disconnect the G23 air conditioning control assembly connector.

(b) Disconnect the G22 multi-display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G23-1 (TX1+) - G22-6 (TX1+)

Always

Below 1 Ω

G23-2 (TX1-) - G22-18 (TX1-)

Always

Below 1 Ω

G23-1 (TX1+) or G22-6 (TX1+) - Body ground

Always

10 kΩ or higher

G23-2 (TX1-) or G22-18 (TX1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Replace the air conditioning control assembly with a new or known good one.

Click here

(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(c) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END

NG

REPLACE MULTI-DISPLAY ASSEMBLY

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