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. |
|
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 | .gif) | GO TO DTC B15D6 |
|
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| 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 |
|
| 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.
|
| 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 CodesOK:
No DTCs are output.
| OK | | END (COMMUNICATION MALFUNCTION DUE TO NOISE) |
|
| 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 | Always | 11 to 14 V |
| G23-7 (ACC) - Body ground | Engine switch on (ACC) | 11 to 14 V |
| G23-8 (IG+) - Body ground | Engine switch on (IG) | 11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 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 |
|
| 7. | CHECK AIR CONDITIONING CONTROL ASSEMBLY |
(a) Replace the air conditioning control assembly with a new or known good one.
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(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 CodesOK:
No DTCs are output.
| OK | | END |
| NG | | REPLACE MULTI-DISPLAY ASSEMBLY |
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