Lexus ES: Power Trunk Lid does not Operate Using Cabin Switch
DESCRIPTION
The trunk and fuel switch assembly (luggage compartment door opening switch) signal is sent to the luggage closer motor assembly.
If the power trunk lid does not operate using the trunk and fuel (luggage compartment door opening switch), a trunk and fuel (luggage compartment door opening switch) circuit malfunction is a possible cause.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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The power trunk lid system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Trunk/BDoor Open SW | Trunk and fuel switch assembly (luggage compartment door opening switch) signal | OFF or ON | OFF: Trunk and fuel switch assembly (luggage compartment door opening switch) off ON: Trunk and fuel switch assembly (luggage compartment door opening switch) on | - |
| Tester Display |
|---|
| Trunk/BDoor Open SW |
OK:
The Data List item changes according to the operation of the trunk and fuel switch assembly (luggage compartment door opening switch).
| OK | .gif) | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
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| 2. | INSPECT TRUNK AND FUEL SWITCH ASSEMBLY (LUGGAGE COMPARTMENT DOOR OPENING SWITCH) |
(a) Remove the trunk and fuel switch assembly (luggage compartment door opening switch).
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(b) Inspect the trunk and fuel switch assembly (luggage compartment door opening switch).
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| NG | | REPLACE TRUNK AND FUEL SWITCH ASSEMBLY (LUGGAGE COMPARTMENT DOOR OPENING SWITCH) |
|
| 3. | CHECK HARNESS AND CONNECTOR (TRUNK AND FUEL SWITCH ASSEMBLY (LUGGAGE COMPARTMENT DOOR OPENING SWITCH) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) |
(a) Disconnect the G38 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G30-4 (B) - G38-4 (TSW) | Always | Below 1 Ω |
| G30-3 (L) - Body ground | Always | Below 1 Ω |
| G30-4 (B) or G38-4 (TSW) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line Main Body ECU (Multiplex Network Body ECU) Outer Mirror Control ECU Assembly
IG signal
ACC signal
Outer mirror switch assembly signal
Mirror position request signal (memory and reactivation function)
Mirror
