Diagnostics Item 1 (6B)

6B1 SELECT HORN SIGNAL OPERATION.
keep both LOCK/ARM and UNLOCK/DISARM buttons pressed for more than 1.5 seconds.

CHECK: Does the horn chirp one time?

YES: Go to step 6B2.

NO: Replace keyless entry control module.

6B2: CHECK HORN SIGNAL OUTPUT SIGNAL.
1. Disconnect connector from keyless entry control module.

Connector & Terminal - [(B176) No.12 (+) - Chassis Ground (-)]:

2. Measure voltage between keyless entry control module connector (B176. and chassis ground.

CHECK: Is the voltage more than 10 V?

YES: Go to step 6B3.

NO: Go to step 6B6.

6B3: CHECK HORN RELAY.
1. Remove horn relay from main fuse box.

Terminals [No.1 - No.2]:

2. Check continuity between horn relay terminals.

CHECK: Does continuity exist?

YES: Replace horn relay.

NO: Go to step 6B4.

Terminals [No.3 - No.4]:

6B4: CHECK HORN RELAY.
Check continuity between horn relay terminals.

CHECK: Does continuity exist?

YES: Go to step 6B5.

NO: Replace horn relay.

6B5: CHECK HORN RELAY.
1. Connect the battery to horn relay terminals No. 3 and No.4.

Terminals [No.1 - No.2]:

2. Check continuity between horn relay terminals.

CHECK: Does continuity exist?

YES: Repair wiring harness of horn circuit.

NO: Replace horn relay.

6B6: CHECK FUSE.
Remove and visually check the fuse No.6 (in main fuse box).

CHECK: Is the fuse No.6 brown?

YES: Replace fuse (15 A).

NO: Go to step 6B7.

6B7: CHECK POWER SUPPLY FOR HORN RELAY.
1. Install horn relay to main fuse box.

Connector & Terminal - [(F37) No.4 (+) - Chassis Ground (-)]:

2. Measure voltage between main fuse box connector (F37. and chassis ground.

CHECK: Is the voltage more than 10 V?

YES: Go to step 6B8.

NO: Repair wiring harness between main fuse box and battery.

6B8: CHECK RESISTANCE BETWEEN HORN RELAY AND KEYLESS ENTRY CONTROL MODULE.
1. Disconnect connector from main fuse box and keyless entry control module.

Connector & Terminal - [(B176) No.12 - (F37) No.4]:

2. Measure resistance between keyless entry control module connector (B176. and main fuse box connector (F37.

CHECK: Is the resistance less than 10 Ohms?

YES: Replace keyless entry control module.

NO: Repair wiring harness between main fuse box and keyless entry control module.