PSD
B2421Component Location:
General Description
Power sliding door (hereinafter PSD) is the system which moves sliding door of vehicle by electronic motor so that user can open or close door with less force than required on manual operation. PSD consists of drive unit, center roller/rail, handle and various kinds of switch (anti pinch, detent, latch), Drive unit is located at rear quarter panel that is between C pillar and D pillar. It is core part of PSD that drives cable by force of motor to move sliding door, beside that Drive unit consists of PSD ECU.door motor,clutch,optical sensor, cable and warning buzzer. When power door open signal is received, PSD ECU operates motor of drive unit and clutch transmits it to cable through clutch drum, then cable moves door. Optical sensor monitors these system operation and delivers it to PSD ECU.
DTC Description
The ECM sets DTC B2421 if there's short to battery in door motor harness.
DTC Detecting Condition:
Schematic Diagram:
Monitor Scantool Data
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF" & PSD "ON"
3. Monitor the "Battery Logic Voltage"," Door/Gate Close Feedback" and "Door/Gate Open Feedback" Parameter on the Scantool.
Specification : 'Door/Gate Open Feedback' & 'Door/Gate Close Feedback' -> 10 - 80% of Battery Logic Voltage
4. Is the measured current data within specifications?
YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Go to "Inspection & Repair" procedure.
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES - Repair as necessary and go to "Verification Vehicle Repair" procedure.
NO - Go to "W/Harness Inspection" procedure.
Power Supply Circuit Inspection
1. Check for short in harness
1. Ignition "ON" & engine "OFF"
2. Measure resistance between terminal "F28-1-2,7 F27-1-2.7" and terminal "F28-2-26, F27-2-26 : F28-1-1 .F27-1-1" of PSD.
Specification : Approx. Infinity ohms
3. Is the measured resistance within specifications?
YES - Go to "Component Inspection" procedure.
NO - Check for short to battery in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Component Inspection
1. Check door motor
1. Ignition "ON" & engine "OFF"
2. Disconnect door motor.
3. Connect (+) terminal of battery to terminal 1 of door motor and (-) terminal to terminal 2 of door motor.
4. Connect (+) terminal of battery to terminal 2 of door motor and (-) terminal to terminal 1 of door motor.
5. Does the door motor work properly?
YES - Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Substitute with a known-good drive unit and check for proper operation.
If the problem is corrected, replace drive unit and then go to "Verification of Vehicle Repair" procedure.
CAUTION: It is impossible to change door motor separately. So it is changed by drive unit when change is necessary.
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC.
2. Operate the vehicle and monitor the DTC on the scantool.
3. Are any DTCs present?
YES - Go to the applicable troubleshooting procedure.
NO - System is performing to specification at this time.