Inspection Procedure

INITIALIZE POWER BACK DOOR ECU
1. Check that the power back door drive unit (power back door ECU) can be initialized (See INITIALIZATION ).
CHECK POWER BACK DOOR SYSTEM
1. Check the power back door system operation.
  OK:
  
  Power back door system operates normally.
  
  NG: Go to step 3
  
  OK: END
CHECK BACK DOOR CLOSER SYSTEM
1. Check the back door closer system operation. (See OPERATION CHECK )
  NG: BACK DOOR CLOSER SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
  
  OK: Go to next step
CHECK COMBINATION METER
1. Check the A/T shift position indicator operation.
2. Check that the speedometer indicates 0 mph when the vehicle is stopped and the engine idling.
  NG: METER/GAUGE SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
  
  OK: Go to next step

CHECK DTC OUTPUT

Check for the DTCs (See DIAGNOSIS SYSTEM ).

Result

RESULT CHART

Result	Proceed to
DTC is not output	A
B2250 is output	B
B2251 is output	C

B: GO TO DTC CHART (B2250) (See DTC B2250 BACK DOOR CLOSER OPERATION MALFUNCTION )

C: GO TO DTC CHART (B2251) (See DTC B2251 BACK DOOR CLOSER SWITCH MALFUNCTION )

A: Go to next step

READ VALUE ON TECHSTREAM

Check the Data List to determine if the back door lock function properly.

Main body ECU (Instrument panel junction block)

DATA LIST REFERENCE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Back Dor Open	Back door lock/Permit or prohibit	Permit: Back door is unlocked Prohibt: Back door is locked	-

OK:

The back door functions as specified in the normal condition.

NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

OK: Go to next step

READ VALUE ON TECHSTREAM

Check the Data List to determine if the power back door touch sensor function properly.

Back door (Power back door ECU)

DATA LIST REFERENCE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PBD Touch Sen L	Power back door touch sensor LH signal/ON or OFF	ON: Power back door touch sensor LH pressed OFF: Power back door touch sensor LH not pressed	-
PBD Touch Sen R	Power back door touch sensor RH signal/ON or OFF	ON: Power back door touch sensor RH pressed OFF: Power back door touch sensor RH not pressed	-

OK:

The power back door touch sensor functions as specified in the normal condition.

NG: GO TO OTHER FLOW CHART (See TOUCH SENSOR CIRCUIT )

OK: Go to next step

READ VALUE ON TECHSTREAM

Check the Data List to determine if the power back door main switch function properly.

Back door (Power back door ECU)

DATA LIST REFERENCE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PBD Main SW	Power back door main switch/ON or OFF	ON: Power back door main switch is not pushed OFF: Power back door main switch is pushed	-

OK:

The power back door main switch functions as specified in the normal condition.

NG: Go to step 9

OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) (See REMOVAL )

INSPECT POWER BACK DOOR MAIN SWITCH

Remove the power back door main switch (See REMOVAL ).
Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Switch Position	Specified Condition
1-2	Free (OFF)	10 kΩ or higher
1-2	Pushed (ON)	Below 1 Ω

NG: REPLACE POWER BACK DOOR MAIN SWITCH (See REMOVAL )

Fig 1: Inspecting Power Back Door Main Switch

OK: Go to next step

CHECK HARNESS AND CONNECTOR (POWER BACK DOOR MAIN SWITCH - POWER BACK DOOR ECU)

Disconnect the E21 switch connector.
Disconnect the 015 ECU connector.
Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E21-1 (UL) - O15-17 (MSW)	Always	Below 1 Ω
E21-2 (E) - Body ground	Always	Below 1 Ω
E21-1 (UL) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying E21 Switch And 015 ECU Connector Terminals

OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) (See POWER BACK DOOR DRIVE UNIT )