1.CHECK RECEIVER INPUT SIGNAL

1. Turn the ignition switch ON.
   ■ CAUTION ■
   Never start the engine.
2. Use an oscilloscope and check the input signal waveform between the low tire pressure warning control unit harness connector terminals and the ground.

Connector | Terminal | — | Condition | Standard
M14 | 22 | Ground | Standby stats |
21
20
19

Connector | Terminal | — | Condition | Standard
M14 | 22 | Ground | When transmitter signal is received |
21
20
19

Is the inspection result normal?
YES>>INSPECTION END
NO>>GO TO 2.
2.CHECK TIRE PRESSURE RECEIVER POWER SUPPLY CIRCUIT

1. Disconnect the tire pressure receiver harness connector.
2. Check the voltage between the tire pressure receiver harness connector and ground.

   Tire pressure receiver | — | Voltage
   Connector | Terminal
   E16 (Front LH) | 1 | Ground | 7 - 16 V
   E44 (Front RH)
   B58 (Rear LH)
   B246 (Rear RH)

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace the malfunctioning harness or connector.
3.CHECK TIRE PRESSURE RECEIVER GROUND CIRCUIT

1. Disconnect the low tire pressure warning control unit harness connector.
2. Check the continuity between the low tire pressure warning control unit harness connector and tire pressure receiver harness connector.

   Low tire pressure warning control unit | Tire pressure receiver | Continuity
   Connector | Terminal | Connector | Terminal
   M14 | 26 | E16 (Front LH) | 4 | Existed
   25 | E44 (Front RH)
   24 | B58 (Rear LH)
   23 | B246 (Rear RH)

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace the malfunctioning harness or connector.
4.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT CIRCUIT
Check the low tire pressure warning control unit circuit. Refer to Diagnosis Procedure (GT-R certified NISSAN dealer).
Is the low tire pressure warning control unit circuit normal?
YES>>Replace the tire pressure receiver.
NO>>Repair or replace error-detected parts.