| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001FOZ0 |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: Security Horn Circuit; 2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ] | ||
|
Security Horn Circuit |
DESCRIPTION
When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
w/ Smart Key System:
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY HORN) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Body Electrical > Main Body > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Security Horn |
Security horn assembly |
ON or OFF |
- |
Body Electrical > Main Body > Active Test
|
Tester Display |
|---|
|
Security Horn |
OK:
The security horn assembly sounds and stops correctly when operated through the Techstream.
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
2. |
INSPECT SECURITY HORN ASSEMBLY |
(a) Remove the security horn assembly.
Click here
![2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ]; THEFT DETERRENT / KEYLESS ENTRY: SECURITY HORN ASSEMBLY: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the security horn assembly.
Click here
| NG |
|
|
|
3. |
INSPECT SECURITY WARNING RELAY (S-HORN) |
|
(a) Remove the security warning relay (S-HORN). |
|
(b) Measure the resistance according to the value(s) in the table below
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Security warning relay (S-HORN) terminal 3 - Security warning relay (S-HORN) terminal 5 |
Auxiliary battery voltage is applied between security warning relay (S-HORN) terminals 2 - 1 |
Below 1 Ω |
|
Security warning relay (S-HORN) terminal 3 - Security warning relay (S-HORN) terminal 5 |
Auxiliary battery voltage is not applied between security warning relay (S-HORN) terminals 2 - 1 |
10 kΩ or higher |
| NG |
|
REPLACE SECURITY WARNING RELAY (S-HORN RELAY) |
|
|
4. |
CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]) |
(a) Remove the main body ECU (multiplex network body ECU).
Click here
(b) Connect the instrument panel junction block assembly connectors.
(c) Remove the security warning relay (S-HORN).
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Security warning relay (S-HORN) terminal 2 - A-29 (SH) |
Always |
Below 1 Ω |
|
Security warning relay (S-HORN) terminal 2 or A-29 (SH) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY WARNING RELAY [S-HORN]) |
|
(a) Remove the security warning relay (S-HORN). |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
Security warning relay (S-HORN) terminal 1 - Body ground |
Ignition switch off |
11 to 14 V |
|
Security warning relay (S-HORN) terminal 5 - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - SECURITY HORN ASSEMBLY) |
(a) Remove the security warning relay (S-HORN).
(b) Disconnect the A16 security horn assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Security warning relay (S-HORN) terminal 3 - A16-1 |
Always |
Below 1 Ω |
|
Security warning relay (S-HORN) terminal 3 or A16-1 - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Remove the security warning relay (S-HORN).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Security warning relay (S-HORN) terminal 2 - 4A-20 |
Always |
Below 1 Ω |
|
Security warning relay (S-HORN) terminal 2 or 4A-20 - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|