DESCRIPTION
When the theft deterrent system is in the alarm sounding state, the main body ECU outputs a signal repeatedly at 0.4 second intervals, causing the horn(s) to sound.
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HORN OPERATION |
(a) Press the horn switch and check if the horn(s) sound.
OK:
Horn(s) operate normally.
NG | ![]() |
GO TO HORN SYSTEM |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (VEHICLE HORN) |
(a) Operate the Techstream according to the steps on the display and select Active
Test (See page ).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Vehicle Horn |
Vehicle horn(s) |
ON/OFF |
- |
OK:
Horn(s) operate normally.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
3. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - MAIN BODY ECU) |
(a) Disconnect the 1C relay connector.
(b) Remove the main body ECU (See page ).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1C-7 - A-28 (HORN) |
Always |
Below 1 Ω |
1C-7 or A-28 (HORN) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Torque Converter Clutch And Drive Plate
Inspection
INSPECTION
PROCEDURE
1. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY
(a) Inspect the 1-way clutch.
(1) Install SST to the inner race of the 1-way clutch.
SST: 09350-32014
09351-32020
(2) Press on the serrations of the starter with a finger a ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedures to troubleshoot the key reminder warning
system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...