POWER BACK DOOR SYSTEM Power Back Door cannot be Opened Using the Back Door Opener Switch

DESCRIPTION

The power back door ECU (power back door motor unit) receives an open signal from the back door opener switch assembly (opener switch) via the certification ECU (smart key ECU assembly).

There are 3 possible causes of a malfunction:

If the power back door cannot be opened only when all doors are locked, a door control receiver circuit malfunction or outside electrical key oscillator (for rear side) circuit malfunction related to the entry system may be the cause.
If the power back door cannot be opened when all doors are locked and also when all doors are unlocked, a back door opener switch circuit malfunction may be the cause.

The power back door may not be able to be opened depending on the customize setting.

Power back door system operation according to the customize setting:
Entry Back Door Open Operation Customized Condition*1 Tester Display: Back Door Opening Operation	Power Back Door Assist Operation Customized Condition*2 Tester Display: PBD Assist Open Operation	Power Back Door System Operation
		All Doors Locked	All Doors Unlocked
Long or Twice	ON	Opens	Opens
OFF	ON	Does not open	Opens
Long or Twice	OFF	Does not open	Does not open
OFF	OFF	Does not open	Does not open

*1: for Entry and Start System (for Entry Function) Click here

*2: for Power Back Door System Click here

WIRING DIAGRAM

Unlock Condition Operation
Lock Condition Operation

INSPECTION PROCEDURE

Tech Tips

Before proceeding with the inspection procedure, check if the customize setting is set according to the table below.

Power back door system operation according to the customize setting:
Entry Back Door Open Operation Customized Condition*1 Tester Display: Back Door Opening Operation	Power Back Door Assist Operation Customized Condition*2 Tester Display: PBD Assist Open Operation	Power Back Door System Operation
		All Doors Locked	All Doors Unlocked
Long or Twice	ON	Opens	Opens

*1: for Entry and Start System (for Entry Function) Click here
*2: for Power Back Door System Click here

PROCEDURE

CHECK BASIC FUNCTION (POWER BACK DOOR ASSIST OPEN OPERATION)

With the electrical key transmitter present, check that the back door opens when the opener switch on the back door opener switch assembly is operated with all doors locked and that the door also opens when all doors are unlocked Click here.

Result

Result	Proceed
Back door does not open when all doors are locked (back door opens when all doors are unlocked)	A
Back door does not open when all doors are locked and also does not open when all doors are unlocked	B

CHECK BASIC FUNCTION (ENTRY BACK DOOR LOCK OPERATION) Click here

CHECK BASIC FUNCTION (WIRELESS ONE MOTION OPERATION)
1. When the power back door switch on the electrical key transmitter is operated with all doors locked, check that the back door opens Click here.
  
  OK
  
  The back door opens.
NG
GO TO ENTRY AND START SYSTEM (for Entry Function) (Proceed to Door Control Receiver Malfunction) Click here

OK

GO TO ENTRY AND START SYSTEM (for Entry Function) (Proceed to Outside Electrical Key Oscillator Malfunction) Click here
CHECK BASIC FUNCTION (ENTRY BACK DOOR LOCK OPERATION)
1. When the lock switch on the back door opener switch assembly is operated with all doors unlocked and the electrical key transmitter present, check that all doors lock Click here.
  
  Tech Tips
  
  When pressing the lock switch, hold the key about 1 m (3.28 ft.) above the ground and about 0.3 m (0.984 ft.) away from the vehicle as shown in the illustration.
  
  OK
  
  All doors lock.
NG
CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND) Click here

OK

OK
The back door opens.

OK
All doors lock.

READ VALUE USING INTELLIGENT TESTER (BACK DOOR OPENER SWITCH)

Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body Electrical / Entry&Start / Data List.

Read the Data List according to the display on the intelligent tester.

Entry&Start (Certification ECU (Smart Key ECU Assembly))
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Tr/B-Door Unlock SW	Back door opener switch assembly (opener switch) / ON or OFF	ON: Back door opener switch assembly (opener switch) pushed OFF: Back door opener switch assembly (opener switch) not pushed	-

OK
On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.

INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
1. Replace the certification ECU (smart key ECU assembly).
NEXT
REGISTER ELECTRICAL KEY TRANSMITTER
1. Register the electrical key transmitter.
NEXT
CHECK BASIC FUNCTION (POWER BACK DOOR ASSIST OPERATION)
1. When the opener switch on the back door opener switch assembly is operated with all doors locked and the electrical key transmitter present, check that the back door opens Click here.
  
  OK
  
  The back door opens.
NG
REPLACE POWER BACK DOOR ECU (POWER BACK DOOR UNIT ASSEMBLY) Click here

OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

OK
The back door opens.

CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND)

Text in Illustration

*1
Front view of wire harness connector

(to Back Door Opener Switch Assembly))

Disconnect the back door opener switch assembly connector.

Text in Illustration
*1	Front view of wire harness connector (to Back Door Opener Switch Assembly))

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
Y11-2 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

INSPECT BACK DOOR OPENER SWITCH ASSEMBLY

Text in Illustration

*1
Component without harness connected

(Back Door Opener Switch Assembly)

Remove the back door opener switch assembly Click here.

Text in Illustration
*1	Component without harness connected (Back Door Opener Switch Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Switch Position	Specified Condition
2 (E) - 3 (UL)	Back door opener switch assembly (opener switch) not pushed (OFF)	10 kΩ or higher
2 (E) - 3 (UL)	Back door opener switch assembly (opener switch) pushed (ON)	Below 1 Ω

REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BACK DOOR OPENER SWITCH)

Text in Illustration
*1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))
*2	Front view of wire harness connector (to Back Door Opener Switch Assembly)

Disconnect the certification ECU (smart key ECU Assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
F58-22 (TSW5) - Y11-3 (UL)	Always	Below 1 Ω
F58-22 (TSW5) - Body ground	Always	10 kΩ or higher
Y11-3 (UL) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)