1.CHECK HAZARD SWITCH SIGNAL INPUT With operating the hazard switch, check the voltage between the BCM harness connector and the ground.

Terminals | Condition | Voltage (Approx.)
(+) | (−)
BCM | Ground | Hazard switch
Connector | Terminal
M122 | 110 | While pressing the switch | 0 V
While not pressing the switch |

Is the measurement value normal?
YES>>Replace the BCM.
NO>>GO TO 2.
2.CHECK HAZARD SWITCH SIGNAL OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the set-up switch connector and BCM connector.
3. Check continuity between the set-up switch harness connector and the BCM harness connector.

   Set-up switch | BCM | Continuity
   Connector | Terminal | Connector | Terminal
   M73 | 13 | M122 | 110 | Existed

Does continuity exist?
YES>>GO TO 3.
NO>>Repair the harnesses or connectors.
3.CHECK HAZARD SWITCH SIGNAL SHORT CIRCUIT
Check continuity between the set-up switch harness connector and the ground.

Set-up switch | Ground | Continuity
Connector | Terminal
M73 | 13 | Not existed

Does continuity exist?
YES>>Repair the harnesses or connectors.
NO>>GO TO 4.
4.CHECK HAZARD SWITCH GROUND OPEN CIRCUIT
Check continuity between the set-up switch harness connector and the ground.

Set-up switch | Ground | Continuity
Connector | Terminal
M73 | 17 | Existed

Does continuity exist?
YES>>Replace the hazard switch (set-up switch).
NO>>Repair the harnesses or connectors.