Diagnostics Item 12 (6M)

6M1: CHECK SECURITY HORN RELAY.




1. Remove security horn relay. (Near the fuse box).

Terminals [No.1 - No.4]:

2. Check continuity between security horn relay terminals.

CHECK: Does continuity exist?

YES: Go to step 6M2.

NO: Replace security horn relay.

Terminals [No.2 - No.3]:

6M2: CHECK SECURITY HORN RELAY.
Check continuity between security horn relay terminals.

CHECK: Does continuity exist?

YES: Replace security horn relay.

NO: Go to step 6M3.

6M3: CHECK SECURITY HORN RELAY.
1. Connect the battery to security horn relay terminals No.1 and No.4.

Terminals [No.2 - No.3]:

2. Check continuity between security horn relay terminals.

CHECK: Does continuity exist?

YES: Go to step 6M4.

NO: Replace security horn relay.

Connector & Terminal - [(B243) No.1 (+) - Chassis Ground (-)]:

6M4: CHECK POWER SUPPLY FOR SECURITY HORN RELAY.
Measure voltage between security horn relay connector (B243) and chassis ground.

CHECK: Is the voltage more than 10 V?

YES: Go to step 6M5.

NO: Repair wiring harness between security horn relay and battery.

Connector & Terminal - [(B243) No.2 (+) - Chassis Ground (-)]:

6M5: CHECK POWER SUPPLY FOR SECURITY HORN RELAY.
Measure voltage between security horn relay connector (B243) and chassis ground.

CHECK: Is the voltage more than 10 V?

YES: Go to step 6M6.

NO: Repair wiring harness between security horn relay and battery.

6M6: CHECK HARNESS BETWEEN SECURITY HORN RELAY AND SECURITY CONTROL MODULE.
1. Disconnect connector from security control module.

Connector & Terminal - [(B243) No.3 - (B93) No.18]:

2. Measure resistance between security horn relay connector (B243) and security control module connector (B93).

CHECK: Is the resistance less than 10 Ohms?

YES: Go to step 6M7.

NO: Repair wiring harness between security horn relay and security control module.

Connector & Terminal - [(B243) No.4 - (B93) No.16]:

6M7: CHECK HARNESS BETWEEN SECURITY HORN RELAY AND SECURITY CONTROL MODULE.
Measure resistance between security horn relay connector (B243) and security control module connector (B93).

CHECK: Is the resistance less than 10 Ohms?

YES: Go to step 6M8.

NO: Repair wiring harness between security horn relay and security control module.

6M8: CHECK HARNESS BETWEEN SECURITY HORN RELAY AND SECURITY CONTROL MODULE.
1. Disconnect connector from security horn.

Connector & Terminal - [(B204) No.1 - (B93) No.17]:

2. Measure resistance between security horn connector (B204) and security control module connector (B93).

CHECK: Is the resistance less than 10 Ohms?

YES: Go to step 6M9.

NO: Repair wiring harness between security horn and security control module.

6M9: CHECK SECURITY HORN.
1. Remove security horn.




2. Connect battery to security horn and check sound of security horn.

CHECK: Does the security horn sound?

YES: Replace security control module.

NO: Repair security horn.