Body Electrical System > Power Tail Gate System > B1586 Chime Open or Short to Battery

Component Location

General Description

Power Tailgate(hereinafter PTG) is the system which moves tailgate of vehicle by electronic motor so that user can open or close door with less force than required on manual operation. PTG ECU operates chime if there any problem in power gate operation, chime buzzer is located at lower part of tailgate. Chime & tail lamp shall operate prior to and during power opening or closing the Tailgate (3 Times :0.5 sec on, 0.5 sec off), after 1 chime start opening or closing with two chimes) and it also operate when a power operation cannot be performed as requested except handle pull (1 Time : Duration 0.5 second on) or an obstacle has been detected or PTG has not reached primary latch position after a power cinch cycle (3 Times : 0.5 sec on, 0.5 sec off) or the PTG is not in primary latch position and the vehicle is moving (Continuous : 30 seconds).

DTC Description

The ECM sets DTC B1586 if alarm voltage value is more than 6V when alarm output command is off.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•	Check Voltage

•	Short to battery in power harness

•	Open in power harness

•	Faulty chime bell

Enable Conditions

•	IGN "ON" &ENG "OFF" & PTG "ON"

Threshold value

•

> 6V

Detecting time

•

1280 msec

FAIL SAFE

Schematic Diagram

Monitor DTC Status

1.	Connect scantool to Data Link Connector(DLC).

2.	Ignition "ON" & engine "OFF" & PTG "ON"

3.	Selet "Diagnostic Trouble Codes(DTCs)"mode and monitor "DTC Status" parameter.

Is the DTC B1586 present?

	▶ Go to "Inspection & Repair" procedure.
	▶ 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.

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.

Has a problem been found?

	▶ Repair as necessary and go to "Verification Vehicle Repair" procedure.
	▶ Go to "W/Harness Inspection" procedure.

Power Circuit Inspection

Check for open in harness

(1)	Ignition "OFF" & engine "OFF".

(2)

Measure resistance between power terminal of PTG warning buzzer and terminal of chime bell.

Specification : Approx. 0 Ω

(3)

Is the measured resistance within specifications?

	▶ Go to "power circuit inspection" procedure.
	▶ Check for open in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Power circuit inspection.

(1)	Ignition "ON" & engine "OFF".

(2)	Disconnect PTG warning buzzer module.

(3)

Measure resistance between power terminal of PTG warning buzzer and chassis ground.

Specification : Approx. 5V

(4)

Is the measured voltage within specifications?

	▶ Go to "Ground circuit Inspection" procedure.
	▶ Check for short to battery in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Check for ground circuit inspection.

(1)	Ignition "OFF" & engine "OFF".

(2)

Measure resistance between ground terminal of PTG warning buzzer and ground terminal of chime bell.

Specification : Approx. 0 Ω

(3)

Is the measured resistance within specifications?

	▶ Go to "Component inspection" procedure.
	▶ Check for open in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Component Inspection

Check chime bell

(1)	Ignition "OFF" & engine "OFF".

(2)	Disconnect chime bell.

(3)	Connect (+) terminal of battery to terminal 5 of chime bell and (-) terminal to terminal 2 of chime bell.

(4)

Dose the chime bell work properly?

	▶ 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.
	▶ Substitute with a known-good chime bell and check for proper operation. If the problem is corrected, replace chime bell and then go to "Verification of Vehicle Repair" procedure.

Verification Of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

1.	Connect scantool and selet "Diagnostic Trouble Codes(DTCs)" mode and then clear DTC.

2.	Operate the vehicle and monitor the DTC on the scantool.

Are any DTCs present ?

	▶ Go to the applicable troubleshooting procedure.
	▶ System is performing to specification at this time.