B2720

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

Turn ignition switch OFF, and wait for 10 seconds or more.
- GO TO 2.

2. DETECT DTC

CONSULT SELF-DIAGNOSIS
1.Turn ignition switch ON.
2.Perform "SONAR" self-diagnosis.
Is DTC "B2720" detected?
YES ("CORNER SENSOR [RL] SHORT-BAT" is detected.)-Refer to "SHORT-BAT : Diagnosis Procedure" .
YES ("CORNER SENSOR [RL] OPEN/SHORT-GND" is detected.)-Refer to "OPEN/SHORT-GND : Diagnosis Procedure" .
YES ("CORNER SENSOR [RL] SENSOR" is detected.)-Refer to "SENSOR : Diagnosis Procedure" .
YES ("CORNER SENSOR [RL] CONFIG ERROR" is detected.)-Refer to "CONFIG ERROR : Diagnosis Procedure" .
NO- INSPECTION END


SHORT-BAT : Diagnosis Procedure


1. CHECK REAR CORNER SENSOR LH SIGNAL CIRCUIT (SHORT CIRCUIT TO POWER SUPPLY) 1

1.Turn ignition switch OFF.
2.Disconnect sonar control unit connector and rear corner sensor LH connector.
3.Turn ignition switch ON.
4.Check voltage between sonar control unit connector and ground.





Is the check result normal?
YES- GO TO 2.
NO- Repair the harnesses or connectors (short circuit to power supply harness).

2. CHECK REAR CORNER SENSOR LH SIGNAL CIRCUIT (SHORT CIRCUIT TO POWER SUPPLY) 2

Check continuity between sonar control unit connector and rear corner sensor LH connector.





Is the check result normal?
YES- Replace rear corner sensor LH. Refer to "Removal and Installation" Service and Repair.
NO- Repair the harnesses or connectors (short circuit to power supply harness).


OPEN/SHORT-GND : Diagnosis Procedure


1. CHECK REAR CORNER SENSOR LH SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect sonar control unit connector and rear corner sensor LH connector.
3.Check continuity between sonar control unit connector and rear corner sensor LH connector.





4.Check for continuity between sonar control unit and ground.





Is the check result normal?
YES- GO TO 2.
NO- Repair the harnesses or connectors.

2. CHECK REAR CORNER SENSOR LH GROUND CIRCUIT.

Check continuity between sonar control unit connector and rear corner sensor LH connector.





Is the check result normal?
YES- Replace rear corner sensor LH. Refer to "Removal and Installation" Service and Repair.
NO- Repair the harnesses or connectors.


SENSOR : Diagnosis Procedure


1. PERFORM CONFIRMATION PROCEDURES

1.Perform DTC confirmation procedure. Refer to "DTC Logic" .
2.Perform self-diagnosis. Check whether or not DTC "B2720 CORNER SENSOR [RL] SENSOR" is detected.
Is DTC "B2720 CORNER SENSOR [RL] SENSOR" detected?
YES- Replace rear corner sensor LH. Refer to "Removal and Installation" Service and Repair.
NO- Malfunction may be detected temporarily. Wait for constant malfunction if malfunction symptom is not confirmed.


CONFIG ERROR : Diagnosis Procedure


1. PERFORM CONFIGURATION OF SONAR CONTROL UNIT

1.Perform configuration of sonar control unit. Refer to "CONFIGURATION (SONAR CONTROL UNIT) : Special Repair Requirement" Configuration (Sonar Control Unit).
2.Perform DTC confirmation procedure.Refer to "DTC Logic" .
Is DTC "B2720 CORNER SENSOR [RL] CONFIG ERROR" detected?
YES- Replace rear corner sensor LH. Refer to "Removal and Installation" Service and Repair.
NO- Check is complete.