DESCRIPTION
The security courtesy switch is installed together with the hood lock. This switch turns off when the engine hood is opened and turns on when the engine hood is closed.
WIRING DIAGRAM
PROCEDURE
1. |
INSPECT HOOD LOCK ASSEMBLY (SECURITY COURTESY SWITCH) |
(a) Remove the hood lock assembly (See page
|
|
(b) Disconnect the A7 security courtesy switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
1 - 2 |
Opened |
Below 1 Ω |
Locked |
10 kΩ or higher |
*1 |
Component without harness connected (Hood Lock Assembly (Security Courtesy Switch)) |
*2 |
Opened |
*3 |
Locked |
NG | ![]() |
REPLACE HOOD LOCK ASSEMBLY (SECURITY COURTESY SWITCH) |
|
2. |
CHECK HARNESS AND CONNECTOR (SECURITY COURTESY SWITCH - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SECURITY COURTESY SWITCH) |
(a) Disconnect the D50 main body ECU (driver side junction block assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D50-16 (HCTY) - A7-1 |
Always |
Below 1 Ω |
D50-16 (HCTY) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Main Body ECU (Driver Side Junction Block Assembly)) |
*2 |
Front view of wire harness connector (to Security Courtesy Switch) |
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Clearance Warning Buzzer Circuit
DESCRIPTION
This circuit consists of the No. 1 clearance warning buzzer and clearance warning
ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzer using
a sound pattern that changes depending on the distance to the obstacle.
WIRI ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
of probability in the "Suspected Area" column of ...
Glossary Of Sae And Toyota Terms
GLOSSARY OF SAE AND TOYOTA TERMS
This glossary lists all SAE-J1930 terms and abbreviations used in this manual
in compliance with SAE recommendations, as well as their TOYOTA equivalents.
SAE
Abbreviation
SAE Term
TOYOTA ...