1.CHECK POWER SUPPLY OF TIRE PRESSURE WARNING CHECK SWITCH

1. Turn the ignition switch ON.
   ■ CAUTION ■
   Never start the engine.
2. Check the voltage between the tire pressure warning check switch connector and the ground.

Tire pressure warning check switch | — | Voltage
Connector | Terminal
M23 | 1 | Ground | 7.6 - 14.6 V

Is the output voltage normal?
YES>>Repair or replace the circuit in the low tire pressure warning control unit. Or, replace the low tire pressure warning control unit.
NO>>GO TO 2.
2.CHECK TIRE PRESSURE WARNING CHECK SWITCH CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the low tire pressure warning control unit harness connector.
3. Check the continuity between the terminals of the low tire pressure warning control unit harness connector and the tire pressure warning check switch connector.

   Low tire pressure warning control unit | Tire pressure warning check switch | Continuity
   Connector | Terminal | Connector | Terminal
   M14 | 12 | M23 | 1 | Existed

4. Check the continuity between the low tire pressure warning control unit harness connector and the ground.

   Low tire pressure warning control unit | — | Continuity
   Connector | Terminal
   M14 | 12 | Ground | Not existed

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace error-detected parts.
3.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT
Check the input/output signals of the low tire pressure warning control unit. Refer to Reference Value (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>Replace the low tire pressure warning control unit.
NO>>GO TO 4.
4.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT HARNESS CONNECTOR
Check for looseness or damage at the harness connector pins of the low tire pressure warning control unit.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Repair or replace error-detected parts.