C1734

C1734 BCM





Description
The BCM reads the tire pressure signal received by the tire pressure receiver, and controls the low tire pressure warning lamp and the buzzer operations. It also has a judgment function to detect a system malfunction.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
2. Perform BCM (AIR PRESSURE MONITOR) self-diagnosis.

CAUTION:
Perform within 15 minutes after stop the vehicle.
Is DTC "C1734" detected?
YES - Perform trouble diagnosis. Refer to C1734.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK BCM POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect BCM harness connector.
3. Check voltage between BCM harness connector terminals and ground.





Is the power supply normal?
YES - GO TO 2.
NO - Check the following. If any items are damaged, repair or replace damage parts.
- 40A fusible link [No. I located in the fuse block]. Refer to Fuse, Fusible Link and Relay Box.
- 10A fuse [No. 10 located in the fuse block (J/B)]. Refer to Fuse Block - Junction Box (J/B).
- Harness for short or open between battery and BCM harness connector M118 terminal 1.
- Harness for short or open between battery and BCM harness connector M119 terminal 11.
- Check the Battery voltage.
2.CHECK BCM GROUND
Check the continuity between BCM harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN BCM AND TIRE PRESSURE RECEIVER
1. Disconnect tire pressure receiver harness connector.
2. Check the continuity between BCM harness connector and tire pressure receiver harness connector.





3. Check the continuity between BCM harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace damaged parts.
4.CHECK BCM
Check the BCM input/output signal. Refer to Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 5.
5.CHECK BCM HARNESS CONNECTOR
Check the BCM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - Replace BCM. Refer to Exploded View.
NO - Check for looseness or damage at the harness connector pins of the low tire pressure warning control unit. Repair or replace if necessary.




Special Repair Requirement
1.CHECK TIRE PRESSURE
Check all tires for tire pressures. Refer to [1][2]Specifications.
Does all tire pressure data meet the specification?
YES - GO TO 2.
NO - Inspect or repair the tires or wheels and adjust the tire pressure to the specification.
2.PERFORM ID REGISTRATION
Perform ID registration. Refer to Special Repair Requirement.
- END