Diagnosis Procedure
- CHECK BATTERY
Check the vehicle battery condition. Refer to Work Flow (without Maintenance-Free Battery) or Work Flow (with Maintenance-Free Battery).
Is the battery in good condition?
YES
GO TO 2.
NO
Charge battery using multi-tasking battery and electrical diagnostic station (165-GR8-1200KIT). For operating instructions, refer to diagnostic station instruction manual. GO TO 2.
- CHECK OPERATION WITH PROPER KICK
Make sure that proper operating conditions have been met for motion-activated back door operation. Refer to System Description . Perform kick with proper form.
Is the system operational?
YES
Instruct customer how to kick with proper form.
NO
GO TO 3.
- CHECK OPERATION OF THE AUTOMATIC BACK DOOR WITH OTHER TRIGGERS
Check if automatic back door works with Intelligent Key, back door switch, and switch on instrument panel.
Is the system operational?
YES
GO TO 4.
NO
Perform diagnosis for automatic back door system. Refer to Work Flow . GO TO 10.
- CHECK DTC WITH AUTOMATIC BACK DOOR CONTROL MODULE
Check that DTC is not detected with automatic back door control module.
Is the inspection result normal?
YES
GO TO 5.
NO
Perform trouble diagnosis relevant to DTC indicated. If DTC exists for automatic back door control module and kick sensor, address automatic back door control module DTC first.
- PERFORM INITIAL SETTING AND ANOTHER PROPER KICK
Perform automatic back door initial setting. Refer to Work Procedure .
Is the system operational?
YES
Instruct customer how to kick with proper form
NO
GO TO 6.
- CHECK VEHICLE EQUIPMENT
- Check to see if the vehicle is equipped with a trailer hitch.
- Use FAST parts catalog to confirm that the correct motion activated back door control unit part number is installed for vehicles equipped with/without a trailer hitch.
Is the correct motion activated back door control unit installed?
YES
GO TO 7.
NO
Replace motion activated back door sensor assembly with the correct part. GO TO 10
- CHECK FOR WIRING OR SENSOR DAMAGE
Remove any bumper undercover, if necessary. Clean off kick sensor assembly of dirt, dust, etc. Check entire kick sensor assembly to see if any wiring, connectors, or sensors are damaged.
Is there any issue with wiring, connectors, or sensors?
YES
GO TO 8.
NO
GO TO 8
- CHECK OUTPUT OF AUTOMATIC BACK DOOR CONTROL MODULE
- Disconnect the motion activated back door control unit.
- Check output voltage of the automatic back door control module.
Motion activated back door control unit connector B459
Condition
Voltage
(Approx.)
(+)
(-)
Terminal
Terminal
2
3
Ignition ON
Battery Voltage
Is the inspection result normal?
YES
GO TO 9
NO
Replace fuse. Refer to. GO TO 10
- CHECK CONTINUITY BETWEEN BCM AND MOTION ACTIVATED BACK DOOR CONTROL UNIT
- Disconnect BCM connector and motion activated back door control unit connector.
- Check continuity between BCM harness connector and motion activated back door control unit connector.
BCM
Motion activated back door control unit
Continuity
Connector
Terminal
Connector
Terminal
M19
51
B459
1
Yes
- Check continuity between motion activated back door control unit harness connector and ground.
Motion activated back door control unit connector
Ground
Continuity
Connector
Terminal
B459
3
Yes
Is the inspection result normal?
YES
Replace motion activated back door kick sensor assembly. Refer to Removal and Installation . GO TO 10.
NO
Repair or replace harness. GO TO 10.
- CHECK OPERATION WITH PROPER KICK
- Make sure that proper operating conditions have been met for motion-activated back door operation. Refer to System Description .
- Perform kick with proper form.
Is the system operational?
YES
Instruct customer how to kick with proper form.
NO
Go back to previous step, and continue with diagnosis.