C1751

C1750, C1751, C1752, C1753 RECEIVER





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION
With CONSULT-III
1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.
2. Stop the vehicle.
3. Perform self-diagnosis for "AIR PRESSURE MONITOR".
Is DTC "C1750", "C1751", "C1752", or "C1753" detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK TIRE PRESSURE RECEIVER INPUT SIGNAL
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.










Is the inspection result normal?
YES - Check connector for loose connection and then perform "DTC CONFIRMATION PROCEDURE"
(self-diagnosis) again. SEE DTC Logic.
NO - GO TO 2.
2.CHECK TIRE PRESSURE RECEIVER POWER SUPPLY CIRCUIT
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.
3.CHECK TIRE PRESSURE RECEIVER GROUND CIRCUIT
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.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace the malfunctioning harness or connector.
4.CHECK FOR CHANGE TO THE TIRE PRESSURE RECEIVER INSTALLATION POSITION (EXAMPLE:
FRONT LH RECEIVER OK/NG JUDGMENT)

NOTE:
Example: Front LH tire pressure receiver OK/NG judgment when DTC "C1750" is detected.
With CONSULT-III
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. SEE 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. C1754.