Toyota Corolla Cross: Horn System
Parts Location
PARTS LOCATION
ILLUSTRATION
|
*1 | LOW PITCHED HORN ASSEMBLY |
*2 | NO. 1 ENGINE ROOM RELAY BLOCK ASSEMBLY - HORN FUSE - HORN RELAY ASSEMBLY |
ILLUSTRATION
|
*1 | SPIRAL CABLE SUB-ASSEMBLY |
*2 | HORN BUTTON ASSEMBLY |
|
*3 | POWER DISTRIBUTION BOX ASSEMBLY |
*4 | MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
*5 | DLC3 |
- | - |
System Diagram
SYSTEM DIAGRAM
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- When replacing the power distribution box assembly, the system may not operate normally if the same part number is not used.
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1
- for HEV Model:
Click here
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- for Gasoline Model:
Click here
- *1: w/ Smart Key System
- for HEV Model:
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 the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Horn System|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Horn does not sound | HORN fuse |
- |
| HORN relay assembly |
| |
|
Horn button assembly |
| |
|
Spiral cable sub-assembly |
| |
|
Power distribution box assembly |
| |
|
Harness or connector |
- | |
|
Horn sounds all the time |
HORN relay assembly |
|
|
Horn button assembly |
| |
|
Spiral cable sub-assembly |
| |
|
Power distribution box assembly |
| |
|
Main body ECU (Multiplex network body ECU) |
| |
|
Harness or connector |
- |
Data List / Active Test
DATA LIST / ACTIVE TEST
ACTIVE TEST
HINT:
Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Vehicle Horn | Vehicle horn |
OFF or ON | - |
READ NEXT:
Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE
1. INSPECT HORN RELAY ASSEMBLY (a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below.
Standard
SEE MORE:
RSA (Road Sign Assist)
The RSA system detects
specific road signs using
the front camera and/or navigation
system (when speed
limit information is available)
and warns the driver
via displays and buzzers.
WARNING
■For safe use
Driving safely is solely the
responsibility of the driver. Pay
careful attention to the su
Inspection
INSPECTION PROCEDURE 1. INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Driver Side)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection Condition
Specified Condition
O49-3(+) - O49-2(-)
Driver side seat
