DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)
CHECK WIRELESS DOOR LOCK FUNCTION
CHECK HAZARD WARNING LIGHT
CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - CERTIFICATION ECU AND BODY GROUND)
CHECK WIRELESS DOOR LOCK BUZZER (OPERATION)
WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Entry and Start System) - No Answer-Back
DESCRIPTION
In some cases, wireless door lock control functions are normal but the turn signal lights and wireless door lock buzzer are not. Malfunctions may be present in the main body ECU, certification ECU (smart key ECU assembly), turn signal lights, and/or wireless door lock buzzer signal outputs.*
Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
When troubleshooting a function, first make sure that the answer-back function is set to the default setting.
Check that DTC B1242 is not output.
When troubleshooting a function, first make sure that the open door warning function is set to the default setting.
- *: For Europe and China, there is no buzzer sound answer-back function.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Main Body / Data List.
Read the Data List according to the display on the intelligent tester.
Main Body| Tester Display | Measurement Item / Range | Normal Condition | Diagnostic Note |
| D Lock Pos switch | Driver side door lock position switch signal / ON or OFF | ON: Driver side door lock is unlocked
OFF: Driver side door lock is locked | - |
| P Lock Pos switch | Passenger side door lock position switch signal / ON or OFF | ON: Passenger side door is unlocked
OFF: Passenger side door is locked | - |
| RL Lock Pos switch | Rear door LH lock position switch signal / ON or OFF | ON: Rear side door LH is unlocked
OFF: Rear side door LH is locked | - |
| RR Lock Pos switch | Rear door RH lock position switch signal / ON or OFF | ON: Rear side door RH is unlocked
OFF: Rear side door RH is locked | - |
| Back Lock Pos switch | Back door lock position switch signal / ON or OFF | ON: Back door is unlocked
OFF: Back door is locked | - |
- OK:
- On the intelligent tester screen, the display changes between LOCK and UNLOCK as shown in the chart above.
Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Driver Door LOCK/UNLOCK Functions do not Operate) ().
Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Passenger Door LOCK/UNLOCK Functions do not Operate) ().
Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK/UNLOCK Functions do not Operate) ().
Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door RH LOCK/UNLOCK Functions do not Operate) ().
Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Back Door LOCK/UNLOCK Functions do not Operate) ().
| | Go to POWER DOOR LOCK CONTROL SYSTEM |
|
|
| 2.CHECK WIRELESS DOOR LOCK FUNCTION |
Check that the wireless door lock control functions operate with a transmitter ().
Result| Result | Proceed to |
| Wireless door lock control functions operate normally but turn signal light answer-back does not occur | A |
| Wireless door lock control functions operate normally but wireless door lock buzzer answer-back does not occur | B |
| 3.CHECK HAZARD WARNING LIGHT |
Check that the turn signal lights flash continuously when the hazard warning signal switch is pressed ().
- OK:
- Hazard warning lights flash continuously.
| | Go to PROBLEM SYMPTOMS TABLE (LIGHTING SYSTEM) ()
|
|
|
| OK | |
| |
| REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
|
| 4.CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - CERTIFICATION ECU AND BODY GROUND) |
Disconnect the E29 ECU connector.
Disconnect the A20 buzzer connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A20-1 - E29-21 (BZR) | Always | Below 1 Ω |
| A20-2 - Body ground |
| A20-1 - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.CHECK WIRELESS DOOR LOCK BUZZER (OPERATION) |
Temporarily replace the wireless door lock buzzer with a new one ().
Check that the wireless door lock buzzer sounds by using the transmitter lock/unlock switch.
- OK:
- Wireless door lock buzzer sounds.
| | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
|
| OK | |
| |
| END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE) |
|