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 an ID code from the door electrical key oscillator (back door) matches the ID code from the key, the certification ECU outputs an SEL signal (Lo when output) to the door electrical key oscillator (back door), activates the touch sensor located on the backside of the outside door handle, and enters unlock standby mode. When the touch sensor is touched, the door electrical key oscillator (back door) sends an SENS signal (Lo when output) to the certification ECU and the certification ECU sends an unlock signal to the back door lock.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream ON.
(c) By following the Techstream screen display, check whether any DTCs are output.
OK:
No DTC output.
C -- Go to DIAGNOSTIC TROUBLE CODE CHART
B -- Go to DIAGNOSTIC TROUBLE CODE CHART
A -- Continue to next step.
2. CHECK MANUAL DOOR UNLOCK OPERATION
(a) Check that all the doors unlock when the door control switch (for manual operation) is turned to UNLOCK.
OK:
All doors can be unlocked with door control switch.
NG -- Go to POWER DOOR LOCK CONTROL SYSTEM
OK -- Continue to next step.
3. CHECK WIRELESS DOOR LOCK CONTROL OPERATION
(a) Check that the wireless door lock and unlock functions operate normally Operation Check.
OK:
Wireless door lock and unlock functions operate normally.
NG -- Go to WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System)
OK -- Continue to next step.
4. READ VALUE USING TECHSTREAM (DOOR COURTESY SWITCH)
(a) Check the Data List for proper functioning of the back door courtesy light switch.
OK:
On Techstream screen, item changes between ON and OFF according to above chart.
NG -- Go to LIGHTING SYSTEM
OK -- Continue to next step.
5. PERFORM ACTIVE TEST USING TECHSTREAM (BACK DOOR SELECT)
(a) Select the Active Test, use the Techstream to generate a control command, and then check that the door electrical key oscillator operates.
OK:
ON (Outside Trunk/Backdoor Transmitter is ON) appears on screen.
NG -- REPLACE ECU AGGREGATION BOX (CERTIFICATION ECU)
OK -- Continue to next step.
6. READ VALUE USING TECHSTREAM (TOUCH SENSOR)
(a) With "Back Door Select" ON, check the Data List to confirm the operation of the touch sensor.
OK:
When back door sensor is set to ON, ON (sensor is touched) appears on screen.
NG -- CHECK DOOR ELECTRICAL KEY OSCILLATOR (for Back Door)
OK -- Continue to next step.
7. CHECK ECU AGGREGATION BOX (OPERATION)
(a) Temporarily replace the ECU aggregation box (certification ECU) with a new or normally functioning one.
(b) Check that the entry back door unlock function operates normally.
OK:
Entry back door unlock function operates normally.
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)
OK -- END (CERTIFICATION ECU IS DEFECTIVE)
8. CHECK DOOR ELECTRICAL KEY OSCILLATOR (for Back Door)
(a) Measure the voltage of the oscillator.
Standard voltage:
NG -- CHECK WIRE HARNESS (DOOR ELECTRICAL KEY OSCILLATOR - ELECTRICAL KEY ANTENNA)
OK -- REPLACE ECU AGGREGATION BOX (CERTIFICATION ECU)
9. CHECK WIRE HARNESS (DOOR ELECTRICAL KEY OSCILLATOR - ELECTRICAL KEY ANTENNA)
(a) Disconnect the Q11 oscillator connector.
(b) Disconnect the Q12 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.
10. CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR ELECTRICAL KEY OSCILLATOR)
(a) Disconnect the E84 ECU connector.
(b) Disconnect the Q11 oscillator connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE DOOR ELECTRICAL KEY OSCILLATOR (for Back Door)
11. REPLACE DOOR ELECTRICAL KEY OSCILLATOR (for Back Door)
12. Go to DIAGNOSTIC TROUBLE CODE CHART Starting - Smart Key System
13. Go to POWER DOOR LOCK CONTROL SYSTEM Operation Check
14. Go to WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System) Operation Check
15. Go to LIGHTING SYSTEM Door Courtesy Switch Circuit
16. REPLACE ECU AGGREGATION BOX (CERTIFICATION ECU) Removal
17. REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)
18. END (CERTIFICATION ECU IS DEFECTIVE)
19. REPAIR OR REPLACE HARNESS AND CONNECTOR
20. Go to DIAGNOSTIC TROUBLE CODE CHART Starting - Smart Key System