Inspection Procedure
- PERFORM ACTIVE TEST (SECURITY HORN)
- Select the ACTIVE TEST, use the hand-held tester to generate a control command, and then check that the security horn sounds.
Theft warning ECU assy:
DIAGNOSTIC TABLEItem Test Details Diagnostic Note SECURITY HORN Security horn ON/OFF - OK: Security horn operates normally.
- NG: Go to step 2
- REPLACE THEFT WARNING ECU ASSY
- Select the ACTIVE TEST, use the hand-held tester to generate a control command, and then check that the security horn sounds.
- INSPECT SECURITY HORN ASSY
- Remove the security horn.
- Check operation of the horn.
OK:
MEASUREMENT SPECIFIED CONDITIONMeasurement Condition Specified Condition Battery positive (+) --> Terminal 1
Battery negative (-) --> Horn bracketHorn sounds
- NG: REPLACE SECURITY HORN ASSY
- OK: Go to next step.
- CHECK WIRE HARNESS (THEFT WARNING ECU ASSY - SECURITY HORN ASSY)
- Disconnect the T7 ECU connector.
- Disconnect the T1 horn connector.
- Check the resistance of the wire harness side connectors.
Standard:
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition 17-22 (SH-) - T1-1 Below 1 ohms 17-22 (SH-) or T1-1 - Body ground 10 k ohms or higher
- NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
- OK: REPLACE THEFT WARNING ECU ASSY