DESCRIPTION
The main body ECU (multiplex network body ECU) receives switch signals from the luggage compartment door opening switch assembly and operates the luggage compartment door lock assembly to open the luggage compartment door.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
The luggage compartment door opener 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.
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly)*, refer to Service Bulletin.
*: w/ Smart Entry and Start System
The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*
*: w/ Door Control Battery
PROCEDURE
CHECK POWER DOOR LOCK CONTROL SYSTEM
Check power door lock control system operation.
| OK |
|---|
| Power door lock control system is normal. |
| Result | |||
|---|---|---|---|
|
| NG |
|
GO TO POWER DOOR LOCK CONTROL SYSTEM Click here |
| OK |
|
CHECK WIRELESS DOOR LOCK CONTROL SYSTEM
Check wireless door lock control system operation.
w/ Smart Entry and Start System: Click here
w/o Smart Entry and Start System: Click here
| OK |
|---|
| Wireless door lock control system is normal. |
| Result | ||||||||
|---|---|---|---|---|---|---|---|---|
|
| B |
|
GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Entry and Start System) Click here |
| C |
|
GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Entry and Start System) Click here |
| A |
|
PERFORM ACTIVE TEST USING GTS (Trunk and Back-Door Open)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Main Body / Active Test.
Perform the Active Test according to the display on the GTS.
| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Trunk and Back-Door Open | Operate luggage compartment door lock assembly latch release | OFF or ON | - |
| Tester Display |
|---|
| Trunk and Back-Door Open |
| OK |
|---|
| Luggage compartment door lock assembly latch release motor operates normally. |
| Result | |||
|---|---|---|---|
|
| NG |
|
INSPECT LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY Click here |
| OK |
|
READ VALUE USING GTS (Trunk/BDoor Open SW, Luggage Courtesy SW)
Enter the following menus: Body Electrical / Main Body / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Trunk/BDoor Open SW | Luggage compartment door opening switch signal | OFF or ON | OFF: Luggage compartment door opening switch off ON: Luggage compartment door opening switch on |
- |
| Luggage Courtesy SW | Luggage compartment door courtesy light switch signal | OFF or ON | OFF: Luggage compartment door courtesy light switch off ON: Luggage compartment door courtesy light switch on |
- |
| Tester Display |
|---|
| Trunk/BDoor Open SW |
| Luggage Courtesy SW |
| OK |
|---|
| The GTS display changes correctly in response to the ON/OFF operation of the luggage compartment door opening switch or luggage compartment door courtesy light switch. |
| Result | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| A |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |
| C |
|
INSPECT LUGGAGE COMPARTMENT DOOR OPENING SWITCH ASSEMBLY Click here |
| D |
|
GO TO LIGHTING SYSTEM Click here |
| B |
|
READ VALUE USING GTS (Tr/B-Door Unlock SW)
Enter the following menus: Body Electrical / Entry&Start / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tr/B-Door Unlock SW | Luggage electrical key switch | OFF or ON | OFF: Luggage electrical key switch not pressed ON: Luggage electrical key switch pressed |
When this item is abnormal, there is a malfunction in the luggage electrical key switch or related parts. |
| OK |
|---|
| The GTS display changes correctly in response to the operation of the luggage electrical key switch. |
| Result | |||
|---|---|---|---|
|
| OK |
|
END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE) |
| NG |
|
GO TO SMART ENTRY AND START SYSTEM (for Entry Function) Click here |
INSPECT LUGGAGE COMPARTMENT DOOR OPENING SWITCH ASSEMBLY
Remove the luggage compartment door opening switch assembly.
Inspect the luggage compartment door opening switch assembly.
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE LUGGAGE COMPARTMENT DOOR OPENING SWITCH ASSEMBLY Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - LUGGAGE COMPARTMENT DOOR OPENING SWITCH ASSEMBLY AND BODY GROUND)
Disconnect the K53 main body ECU (multiplex network body ECU) connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY
Remove the luggage compartment door lock assembly.
Inspect the luggage compartment door lock assembly.
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)
Disconnect the 3D instrument panel junction block assembly connector.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| Result | |||
|---|---|---|---|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| OK |
|
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
Temporarily replace the instrument panel junction block assembly with a new or known good one.
Check that the luggage door opener system is normal.
| Result | |||
|---|---|---|---|
|
| OK |
|
END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE) |
| NG |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |