DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT DTC
READ VALUE OF INTELLIGENT TESTER
INSPECT ENGINE HOOD COURTESY SWITCH
CHECK HARNESS AND CONNECTOR (ENGINE ROOM R/B NO. 2 - ENGINE HOOD COURTESY SWITCH)
CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND)
THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) - Engine Hood Courtesy Switch Circuit
DESCRIPTION
The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is opened and turns off when the engine hood is closed.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Front controller sends engine hood open/close signal to main body ECU RH through the multiplex communication.
| OK | |
| |
| REPLACE ENGINE ROOM NO. 2 RELAY BLOCK AND JUNCTION BLOCK (FRONT CONTROLLER) |
|
| 3.INSPECT ENGINE HOOD COURTESY SWITCH |
Remove the courtesy switch from the hood lock.
Disconnect the 2G R/B connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Switch Position | Specified Condition |
| 1 - 2 | Free (OFF) | 10 kΩ or higher |
| Pushed (ON) | Below 1 Ω |
| | REPLACE HOOD LOCK ASSEMBLY |
|
|
| 4.CHECK HARNESS AND CONNECTOR (ENGINE ROOM R/B NO. 2 - ENGINE HOOD COURTESY SWITCH) |
Disconnect the 2G R/B connector and B8 switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Specified Condition |
| 2G-3 - B8-2 | Below 1 Ω |
| 2G-3 or B8-2 - Body ground | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Specified Condition |
| B8-1 - Body ground | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
LEXUS IS250, IS220d / GSE20 ALE20
