DESCRIPTION The smart key
system (for Entry Function) uses the wireless door lock buzzer to
perform various vehicle exterior warnings. When the conditions of each
warning are met, the certification ECU (smart key ECU assembly) sends a
buzzer activation request signal to the main body ECU (multiplex network
body ECU) via CAN communication and the buzzer sounds. WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- The smart key system (for Entry Function, Gasoline Model) uses the CAN
communication system. Inspect the communication function by following
How to Proceed with Troubleshooting. Troubleshoot the smart key system
(for Entry Function, Gasoline Model) after confirming that the
communication systems are functioning properly.
Click here 
- When using the Techstream with the engine switch off, connect the
Techstream to the DLC3 and turn a courtesy light switch on and off at
intervals of 1.5 seconds or less until communication between the
Techstream and the vehicle begins. Then select the vehicle type under
manual mode and enter the following menus: Body Electrical / Smart Key.
While using the Techstream, periodically turn a courtesy light switch on
and off at intervals of 1.5 seconds or less to maintain communication
between the Techstream and the vehicle.
- Before replacing the certification ECU (smart key ECU assembly) or main
body ECU (multiplex network body ECU), refer to Precaution.
Click here
- After repair, confirm that no DTCs are output.
PROCEDURE |
1. | CHECK CUSTOMIZE SETTING (WIRELESS BUZZER RESP) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Customize Setting / Wireless Door Lock. Wireless Door Lock
|
Tester Display | Description |
Default | Setting |
ECU | | Wireless Buzzer Resp |
Wireless buzzer response |
ON | 0:OFF,1:ON |
Main body ECU (multiplex network body ECU) |
|
Result | Proceed to | |
"ON" is displayed | A | |
"OFF" is displayed | B |
| B |
 | PERFORM CUSTOMIZE SETTING |
|
A |
 | |
| 2. |
CHECK WIRELESS DOOR LOCK CONTROL SYSTEM |
(a) Check that the function operates normally. Click here
|
Result | Proceed to | |
Wireless door lock function operates normally |
A | | Wireless door lock function does not operate normally |
B |
| B |
| GO TO PROBLEM SYMPTOMS TABLE |
|
A | |
| |
| 3. |
READ VALUE USING TECHSTREAM (EACH UNLOCK DETECTION SWITCH) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream. Body Electrical > Main Body > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
FR Door Lock Pos | Front door RH unlock detection switch signal |
UNLOCK or LOCK | UNLOCK: Front door RH unlocked
LOCK: Front door RH locked |
- | | FL Door Lock Pos |
Front door LH unlock detection switch signal |
UNLOCK or LOCK | UNLOCK: Front door LH unlocked
LOCK: Front door LH locked |
- | | RR-Door Lock Pos SW |
Rear door RH unlock detection switch signal |
OFF or ON | OFF: Rear door RH locked
ON: Rear door RH unlocked |
- | | RL-Door Lock Pos SW |
Rear door LH unlock detection switch signal |
OFF or ON | OFF: Rear door LH locked
ON: Rear door LH unlocked |
- | Body Electrical > Main Body > Data List
|
Tester Display | | FR Door Lock Pos | |
FL Door Lock Pos | |
RR-Door Lock Pos SW | |
RL-Door Lock Pos SW | OK: The Techstream display changes correctly in response to the lock/unlock operation.
| NG |
| GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) |
|
OK | |
| |
| 4. |
PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS BUZZER) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform Active Test according to the display on the Techstream. Body Electrical > Main Body > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Wireless Buzzer | Wireless door lock buzzer |
OFF/ON | - | Body Electrical > Main Body > Active Test
|
Tester Display | | Wireless Buzzer |
|
Result | Proceed to | |
Wireless door lock buzzer does not sound |
A | | Wireless door lock buzzer sounds |
B |
| A |
| GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (NO ANSWER-BACK) |
| B |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) | | 
