Back Door Entry Unlock Function Does Not Operate

DOOR LOCK: SMART KEY SYSTEM: Back Door Entry Unlock Function does not Operate

Back Door Entry Unlock Function does not Operate

DESCRIPTION

When the back door opener switch is turned ON, the certification ECU uses the back door oscillator (outer) and antenna to output a request signal to the outside of the vehicle for a distance of approximately 1.0 m (3.3 ft.) from the back door. A key near the back door detects this request and transmits its ID code. The door control receiver receives the ID code and sends this ID code to the certification ECU. The certification ECU checks if the ID code is valid. If the ID code is verified, the certification ECU sends a back door open signal to the driver side junction block (main body ECU) using the multiplex communication line and stops outputting request signals. The driver side junction block (main body ECU) then unlocks the back door.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK ENTRY LOCK AND UNLOCK OPERATION
(a) Check that the entry lock and unlock functions operate normally.
OK:
Entry lock and unlock functions operate normally.
NG -- GO TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (BACK DOOR LOCK SWITCH)
(a) Check the Data List for proper functioning of the back door lock switch.

Certification ECU

OK:
ON (back door lock switch is pushed) appears on the screen.
OK -- INSPECT ELECTRICAL KEY ANTENNA (LUGGAGE)
NG -- Continue to next step.

3. INSPECT BACK DOOR OPENER SWITCH

(a) Disconnect the L4 switch connector.
(b) Measure the resistance of the switch.
Standard resistance:

NG -- REPLACE BACK DOOR LOCK
OK -- Continue to next step.

4. CHECK WIRE HARNESS (CERTIFICATION ECU - BACK DOOR LOCK SWITCH AND BODY GROUND)

(a) Disconnect the S11 ECU connector.
(b) Disconnect the L4 switch connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE CERTIFICATION ECU
5. INSPECT ELECTRICAL KEY ANTENNA (LUGGAGE)

(a) Measure the resistance of antenna.
Standard resistance:

NG -- REPLACE ELECTRICAL KEY ANTENNA (LUGGAGE)
OK -- Continue to next step.

6. CHECK WIRE HARNESS (LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER) - ELECTRICAL KEY ANTENNA (LUGGAGE))

(a) Disconnect the L7 oscillator connector.
(b) Disconnect the E10 antenna connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

7. CHECK WIRE HARNESS (LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER) - BODY GROUND)

(a) Disconnect the L7 oscillator connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

8. PERFORM ACTIVE TEST USING TECHSTREAM (LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER))
(a) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the oscillator (outer) operates.

Certification ECU

OK:
When key is brought close to luggage compartment door, oscillator (outer) is turned ON and indicator on key illuminates.
OK -- REPLACE CERTIFICATION ECU
NG -- Continue to next step.

9. CHECK LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER) (CLG VOLTAGE)

(a) Remove the oscillator but do not disconnect its connector.
(b) Measure the voltage of the connector.
Standard voltage:

NG -- REPLACE LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER)
OK -- Continue to next step.

10. CHECK WIRE HARNESS (CERTIFICATION ECU- LUGGAGE ELECTRICAL KEY OSCILLATOR (OUTER))

(a) Disconnect the S11 ECU connector.
(b) Disconnect the L7 oscillator connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE CERTIFICATION ECU