Diagnostic Procedure: Horn Alarm Signal

Step 1 - 4:

M : DIAGNOSTICS PROCEDURE FOR HORN ALARM SIGNAL

1. CHECK HORN ALARM OUTPUT SIGNAL FOR SECURITY CONTROL MODULE.




1. Remove security control module without disconnecting connector.
2. Measure voltage between security control module connector and body.

Connector & terminal / Specified voltage:
(B93) No 13 - Body / 10 V, or more

3. Set security system in armed state.
4. Open the door without ignition key to operate the security system (alarm state).
5. Measure voltage between security control module and body during alarm state.

Connector & terminal / Specified voltage:
(B93) No.13 - Body / repeats 1 V, max. (0.2 sec.) and 10 V, or more (0.6 sec.) intervals

2. CHECK POWER SUPPLY FOR HORN RELAY.




1. Check fuse No.12.
2. Remove horn relay without disconnecting connector.
3. Measure voltage between horn relay connector and body.

Connector & terminal / Specified voltage:
(B49) No.2 - Body / 10 V, or more

3. CHECK CONTINUITY OF HORN RELAY.




1. Remove horn relay.
2. Check continuity between terminals No.1 and No.2 of horn relay.

4. CHECK HARNESS CONNECTOR BETWEEN HORN RELAY AND SECURITY CONTROL MODULE.




1. Disconnect connectors of horn relay and security control module.
2. Measure resistance of harness connector between horn relay and security control module.

Connector & terminal / Specified resistance:
(B49) No.1 - (B93) No 13 / 10 Ohm, max.

5. CHECK HORN RELAY.
Refer to horn relay for inspection.