Diagnosis Procedure

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

Low tire pressure warning control unit		--	Value (Approx.)
Connector	Terminal
M43	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC. Approx. 4.5 V
	4
	5
	6

Low tire pressure warning control unit		--	Value (Approx.)
Connector	Terminal
M43	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC. Approx. 4.5 V
	4
	5
	6

Is the inspection result normal?

YES

Check connector for loose connection and then perform "DTC CONFIRMATION PROCEDURE" (self-diagnosis) again. Refer to DTC Logic .

NO

GO TO 2.

1. Disconnect the tire pressure receiver harness connector.
2. Turn the ignition switch ON.
   CAUTION: Never start the engine.
3. Check the voltage between tire pressure receiver harness connector and ground.

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace the malfunctioning harness or connector.

1. Turn the ignition switch OFF.
2. Disconnect low tire pressure warning control unit harness connector and tire pressure receiver harness connector.
3. Check the continuity between 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
   M43	26	E58 (Front LH)	4	Existed
   	25	E28 (Front RH)
   	24	B13 (Rear LH)
   	23	B213 (Rear RH)

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace the malfunctioning harness or connector.

With CONSULT

1. Exchange the positions of the front LH tire pressure receiver and the front RH tire pressure receiver.
2. Perform "DTC CONFIRMATION PROCEDURE" (self-diagnosis) again. Refer to DTC Logic .

Is DTC "C1751" detected?

YES

Replace the exchanged front RH tire pressure receiver.

NO

Check the low tire pressure warning control unit circuit. Refer to Diagnosis Procedure .