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:
Engine Coolant Pump No Signal (P26CA31)
DESCRIPTION Refer to DTC P26CA12. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Note
P26CA31 Engine Coolant Pump No Signal
The speed of the engine water pump calculated from the WPI signal is less than 10 rpm (open or short in th
Power Source Mode does not Change to ON (READY)
DESCRIPTION When the electrical key transmitter sub-assembly is in the cabin and the power switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift position is in P and the brake pedal is depressed, the hybrid
