DESCRIPTION
The engine hood courtesy switch is built into the hood lock assembly. This switch turns on when the engine hood is closed and turns off when the engine hood is opened.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Before replacing the main body ECU (multiplex network body ECU), 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
READ VALUE USING GTS (HOOD COURTESY SW)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
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 |
---|---|---|---|---|
Hood Courtesy SW | Engine hood courtesy switch | OFF or ON | OFF: Engine hood closed ON: Engine hood open |
- |
Tester Display |
---|
Hood Courtesy SW |
OK |
---|
The GTS display changes correctly in response to the engine hood courtesy switch (hood lock assembly) status. |
Result | |||
---|---|---|---|
|
OK |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |
NG |
INSPECT ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)
Remove the hood lock assembly.
Inspect the engine hood courtesy switch (hood lock assembly).
Result | |||
---|---|---|---|
|
NG |
REPLACE ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) Click here |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - BODY GROUND)
Disconnect the K52 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 |