CAN

TPMS BRANCH LINE CIRCUIT

Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Disconnect the battery cable from the negative terminal.
3.Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
-Low tire pressure warning control unit
-CAN gateway (With ICC)
Is the inspection result normal?
YES (With ICC)-GO TO 2.
YES (Without ICC)-GO TO 3.
NO- Repair the terminal and connector.

2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the connector of CAN gateway.
2.Check the continuity between the CAN gateway harness connector terminals.





Is the inspection result normal?
YES- GO TO 3.
NO- Check the harness and repair the root cause (CAN communication circuit 2 side). Malfunction Area Chart.

3. CHECK HARNESS FOR OPEN CIRCUIT

1.Connect the connector of CAN gateway. (With ICC)
2.Disconnect the connector of low tire pressure warning control unit.
3.Check the resistance between the low tire pressure warning control unit harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 4.
NO- Repair the low tire pressure warning control unit branch line.

4. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the low tire pressure warning control unit. Power Supply And Ground Circuit.
Is the inspection result normal?
YES (Present error)-Replace the low tire pressure warning control unit. Exploded View.
YES (Past error)-Error was detected in the low tire pressure warning control unit branch line.
NO- Repair the power supply and the ground circuit.