DESCRIPTION When the engine
switch cannot be turned on (ACC) or on (IG), interior verification may
be abnormal or there may be a malfunction in the ACC relay or IG relay
circuit. If interior verification cannot be performed, the certification
ECU (smart key ECU assembly) may be malfunctioning or communication may
not be possible between the No. 1 indoor electrical key antenna
assembly (front floor) or No. 1 indoor electrical key antenna assembly
(rear floor) and the electrical key transmitter sub-assembly and door
control receiver. When an electrical key
transmitter sub-assembly is brought into the cabin, its key ID code is
compared with the key ID code stored in the certification ECU (smart key
ECU assembly). If these codes do not match, key verification will fail
and the engine switch will not be able to be turned on (ACC) or on (IG). When
a door is unlocked and an electrical key transmitter sub-assembly is
brought into the cabin, the certification ECU (smart key ECU assembly)
activates the indoor electrical key antenna assemblies to form the
interior detection area. The electrical key transmitter sub-assembly
then responds to the detection signals with its key ID code. This
response signal is received by the door control receiver and sent to the
certification ECU (smart key ECU assembly). Related Data List and Active Test Items |
Problem Symptom | Data List and Active Test | |
Power source mode does not change to on (IG) or on (ACC) | Power Source Control
- Start Switch1
- Start Switch2
- IG Relay Monitor (Inside)
- ACC Relay Monitor
- IG Relay Monitor (Outside)
- Latch Circuit
- Power Supply Condition
Starting Control
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- 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.
- The smart key system (for Start Function, Gasoline Model) uses the LIN
communication system and CAN communication system. Inspect the
communication function by following How to Proceed with Troubleshooting.
Troubleshoot the smart key system (for Start Function, Gasoline Model)
after confirming that the communication systems are functioning
properly.
Click here 
- Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
- If the smart key system (for Start Function, Gasoline Model) has been
disabled, enable the system before performing troubleshooting.
Click here
- Inspect the fuses of circuits related to this system before performing the following procedure.
- Before replacing the certification ECU (smart key ECU assembly) or an
electrical key transmitter sub-assembly, refer to Registration.
Click here
- After completing repairs, confirm that the problem does not recur.
- After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."
- The indoor electrical key antenna assemblies have an antenna coil between each terminal.
- The door control receiver is also related to interior certification.
HINT:
- If interior verification is unsuccessful, Operation History may be stored.
- If Operation History has been stored, refer to the Operation History
List to determine the detection conditions and narrow down trouble
areas.
Body Electrical > Smart Key > Utility |
Tester Display | | Operation History | PROCEDURE
| 1. |
CHECK POWER SOURCE MODE | (a) Get into the vehicle while carrying the electrical key transmitter sub-assembly that has already been registered.
(b) Move the shift lever to P. (c) Press the engine switch with the brake pedal released and check that the power source mode changes.
Click here
|
Result | Proceed to | |
Power
source mode can only be changed when electrical key transmitter
sub-assembly is in push button start function operation range for rear
side | A | |
Power
source mode can only be changed when electrical key transmitter
sub-assembly is in push button start function operation range for front
side | B | |
Power source mode cannot be changed |
C |
| B |
 | GO TO STEP 6 |
| C |
| GO TO STEP 10 |
|
A |
 | |
| 2. |
CHECK WAVE ENVIRONMENT | (a) Install the transmitter battery to the electrical key transmitter sub-assembly.
Click here (b)
Bring the electrical key transmitter sub-assembly near the No. 1 indoor
electrical key antenna assembly (front floor) and perform an smart key
system check. Click here NOTICE:
Communication
may not be possible if the electrical key transmitter sub-assembly is
within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna
assembly (front floor).
HINT:
- As the effect of wave interference decreases by moving the electrical
key transmitter sub-assembly close to each indoor electrical key antenna
assembly, it may be possible to check whether wave interference is the
cause of the problem.
- If the inspection result is that the problem only occurs in certain
locations or at certain times of day, the possibility of wave
interference is high. Also, added vehicle components may cause wave
interference. If installed, remove them and perform the operation check.
- There may be wave interference if the vehicle is near broadcasting
antennas, large video displays, wireless garage door opener systems,
wireless security cameras, home security systems, etc. In this case,
move the vehicle to a different location and check if there is any
improvement.
- If a tool for checking radio waves, such as a signal strength meter, is
available, move around the area while observing both the LF band (used
by the vehicle antenna to form the detection area) and RF band (used by
the electrical key transmitter sub-assembly for transmission) to check
for locations where there is wave interference.
OK: The engine
starts when the electrical key transmitter sub-assembly is held near
each indoor electrical key antenna assembly and the engine switch is
pressed with the brake pedal depressed.
| OK |
| AFFECTED BY WAVE INTERFERENCE |
|
NG | |
| |
| 3. |
CHECK KEY DIAGNOSTIC MODE | (a) Check the following antennas in key diagnostic mode.
| (b) Check the No. 1 indoor electrical key antenna assembly (front floor).
When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.
HINT:
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the
electrical key transmitter sub-assembly cannot be detected by channel 2
due to a malfunction, such as wave interference.
- It is possible to check which indoor electrical key antenna assembly
(front floor, rear floor or inside luggage compartment) is operating by
the sounding of the buzzer.
- When the wireless buzzer sounds for all indoor electrical key antenna
assemblies, they can be judged as operating properly and a malfunction
in the certification ECU (smart key ECU assembly), which performs
verification, is suspected.
- When the wireless buzzer does not sound for all indoor electrical key
antenna assemblies, it can be judged that the certification ECU (smart
key ECU assembly), which controls the indoor electrical key antenna
assemblies, is malfunctioning.
Body Electrical > Smart Key > Utility |
Tester Display | |
Communication Check(Key Diag Mode) | |
|
|
Result | Proceed to | |
The wireless buzzer does not sound |
A | | The wireless buzzer sounds |
B |
| B |
| AFFECTED BY WAVE INTERFERENCE |
|
A | |
| |
| 4. |
CHECK
HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO.
1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)) |
(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the G42 No. 1 indoor electrical key antenna assembly (front floor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-8 (CLG5) - G42-1 (ANTE5) |
Always | Below 1 Ω | |
G40-9 (CG5B) - G42-3 (CLGB) |
Always | Below 1 Ω | |
G40-8 (CLG5) or G42-1 (ANTE5) - Other terminals and body ground |
Always | 10 kΩ or higher | |
G40-9 (CG5B) or G42-3 (CLGB) - Other terminals and body ground |
Always | 10 kΩ or higher |
(d) Reconnect the G40 certification ECU (smart key ECU assembly) connector.
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)) |
(a) Using an oscilloscope, check the waveform.
|
*a | Front view of wire harness connector
(to No. 1 Indoor Electrical Key Antenna Assembly (Front Floor)) |
*b | Waveform | |
*c | For 30 seconds after closing any door |
*d | After 30 seconds or more have elapsed since any door closed |
OK: |
Tester Connection | Condition |
Tool Setting | Specified Condition | |
G42-1 (ANTE5) - G42-3 (CLGB) |
Procedure:
- Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door
| 2 V/DIV., 500 ms/DIV. |
Pulse generation (See waveform) |
| OK |
| REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) |
| NG |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| 6. |
CHECK WAVE ENVIRONMENT | (a) Install the transmitter battery to the electrical key transmitter sub-assembly.
Click here (b)
Bring the electrical key transmitter sub-assembly near the No. 1 indoor
electrical key antenna assembly (rear floor) and perform an smart key
system check. Click here NOTICE:
Communication
may not be possible if the electrical key transmitter sub-assembly is
within 0.2 m (0.656 ft.) of the center of the No. 1 indoor electrical
key antenna assembly (rear floor). HINT: Check that the customize setting "Ignition Available Area" is set to "All".
HINT:
- As the effect of wave interference decreases by moving the electrical
key transmitter sub-assembly close to each indoor electrical key antenna
assembly, it may be possible to check whether wave interference is the
cause of the problem.
- If the inspection result is that the problem only occurs in certain
locations or at certain times of day, the possibility of wave
interference is high. Also, added vehicle components may cause wave
interference. If installed, remove them and perform the operation check.
- There may be wave interference if the vehicle is near broadcasting
antennas, large video displays, wireless garage door opener systems,
wireless security cameras, home security systems, etc. In this case,
move the vehicle to a different location and check if there is any
improvement.
- If a tool for checking radio waves, such as a signal strength meter, is
available, move around the area while observing both the LF band (used
by the vehicle antenna to form the detection area) and RF band (used by
the electrical key transmitter sub-assembly for transmission) to check
for locations where there is wave interference.
OK: The engine
starts when the electrical key transmitter sub-assembly is held near
each indoor electrical key antenna assembly and the engine switch is
pressed with the brake pedal depressed.
| OK |
| AFFECTED BY WAVE INTERFERENCE |
|
NG | |
| |
| 7. |
CHECK KEY DIAGNOSTIC MODE | (a) Check the following antennas in key diagnostic mode.
| (b) Check the No. 1 indoor electrical key antenna assembly (rear floor).
When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.
HINT:
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the
electrical key transmitter sub-assembly cannot be detected by channel 2
due to a malfunction, such as wave interference.
- It is possible to check which indoor electrical key antenna assembly
(front floor, rear floor or inside luggage compartment) is operating by
the sounding of the buzzer.
- When the wireless buzzer sounds for all indoor electrical key antenna
assemblies, they can be judged as operating properly and a malfunction
in the certification ECU (smart key ECU assembly), which performs
verification, is suspected.
- When the wireless buzzer does not sound for all indoor electrical key
antenna assemblies, it can be judged that the certification ECU (smart
key ECU assembly), which controls the indoor electrical key antenna
assemblies, is malfunctioning.
Body Electrical > Smart Key > Utility |
Tester Display | |
Communication Check(Key Diag Mode) | |
|
|
Result | Proceed to | |
The wireless buzzer does not sound |
A | | The wireless buzzer sounds |
B |
| B |
| AFFECTED BY WAVE INTERFERENCE |
|
A | |
| |
| 8. |
CHECK
HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO.
1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)) |
(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the K12 No. 1 indoor electrical key antenna assembly (rear floor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K10-5 (CLG6) - K12-1 (ANTE6) |
Always | Below 1 Ω | |
K10-6 (CG6B) - K12-3 (CLGB) |
Always | Below 1 Ω | |
K10-5 (CLG6) or K12-1 (ANTE6) - Other terminals and body ground |
Always | 10 kΩ or higher | |
K10-6 (CG6B) or K12-3 (CLGB) - Other terminals and body ground |
Always | 10 kΩ or higher |
(d) Reconnect the K10 certification ECU (smart key ECU assembly) connector.
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 9. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)) |
(a) Using an oscilloscope, check the waveform.
|
*a | Front view of wire harness connector
(to No. 1 Indoor Electrical Key Antenna Assembly (Rear Floor)) |
*b | Waveform | |
*c | For 30 seconds after closing any door |
*d | After 30 seconds or more have elapsed since any door closed |
OK: |
Tester Connection | Condition |
Tool Setting | Specified Condition | |
K12-1 (ANTE6) - K12-3 (CLGB) |
Procedure:
- Engine switch off
- Electrical key transmitter sub-assembly not inside vehicle
- Within 30 seconds of closing any door
| 2 V/DIV., 500 ms/DIV. |
Pulse generation (See waveform) |
| OK |
| REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR) |
| NG |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| 10. |
INSPECT TRANSMITTER BATTERY | (a) Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.
(1)
Press and hold the lock switch of the electrical key transmitter
sub-assembly for 5 seconds and check the number of times that the LED
illuminates.
HINT:
- The electrical key transmitter sub-assembly sends voltage information to
the certification ECU (smart key ECU assembly) when it is being used.
"Yes" is displayed for the Data List item Key Low Battery when this
voltage information indicates 2.2 V or less.
Click here
- Even if the transmitter battery is depleted, it is still possible to
start the engine by holding the electrical key transmitter sub-assembly
near the engine switch, depressing the brake pedal and pressing the
engine switch.
|
Result | Proceed to | |
LED illuminates 3 times or more when switch is pressed and held |
A | | LED does not illuminate when switch is pressed and held |
B | | LED illuminates once or twice but not a third time |
C |
| B |
| GO TO STEP 19 |
| C |
| REPLACE TRANSMITTER BATTERY |
|
A | |
| |
| 11. |
CHECK ENTRY LOCK / UNLOCK OPERATION | (a) Check that the entry lock and unlock functions operate on each door.
Click here HINT: If
the door control receiver is defective, code verification does not
begin in the cabin and the entry lock and unlock functions do not
operate. |
Result | Proceed to | |
Entry functions operate normally for all doors (w/ Wireless Charging System) |
A | | Entry functions operate normally for all doors (w/o Wireless Charging System) |
B | | An entry function does not operate normally for a door |
C |
| B |
| GO TO STEP 13 |
| C |
|
GO TO SMART KEY SYSTEM (for Entry Function, Gasoline Model) (All Door
Entry Lock/Unlock Functions and Wireless Functions do not Operate) |
|
A | |
| |
| 12. |
CHECK WIRELESS CHARGING SYSTEM | (a) Wireless charging system off.
Click here (b) Check that interior verification is performed.
Click here
|
Result | Proceed to | |
Interior verification is not performed normally |
A | | Interior verification is performed normally |
B |
| B |
| GO TO WIRELESS CHARGING SYSTEM |
|
A | |
| |
| 13. |
READ VALUE USING TECHSTREAM (START SWITCH1, START SWITCH2) |
(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 / Power Source Control / Data List.
(e) Read the Data List according to the display on the Techstream. Body Electrical > Power Source Control > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
Start Switch1 | Engine switch 1 status |
OFF or ON | OFF: Engine switch not pressed
ON: Engine switch pressed |
- If the engine switch is pressed for a short time, the display may not change.
- Use this item to determine if the engine switch input signal is malfunctioning.
| | Start Switch2 |
Engine switch 2 status |
OFF or ON | OFF: Engine switch not pressed
ON: Engine switch pressed |
- Backup for engine switch 1. However, when the engine switch is pressed
and held, the control functions only when both engine switch 1 and 2 are
normal.
- Behaves the same way as engine switch 1.
| Body Electrical > Power Source Control > Data List
|
Tester Display | | Start Switch1 | |
Start Switch2 | OK: The value of "Start Switch1" and "Start Switch2" change correctly in response to the engine switch operation.
| NG |
| GO TO STEP 17 |
|
OK | |
| |
| 14. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Measure the voltage while checking the Data List on the Techstream.
(1) Connect the Techstream to the DLC3. (2) Turn the engine switch on (IG).
(3) Turn the Techstream on. (4) Enter the following menus: Body Electrical / Power Source Control / Data List.
(5) Read the Data List according to the display on the Techstream.
|
*a | Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
- | - | Body Electrical > Power Source Control > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
Power Supply Condition |
Power supply state | All OFF, ACC ON, IG ON or ST ON |
All OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC)
IG ON: Engine switch on (IG) ST ON: Sending engine start request signal |
- | Body Electrical > Power Source Control > Data List
|
Tester Display | | Power Supply Condition |
(6) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G40-17 (IG1D) - Body ground |
Engine switch off | Below 1 V | |
Engine switch on (ACC) |
Below 1 V | |
Engine switch on (IG) |
9 V or higher | |
G40-16 (ACCD) - Body ground |
Engine switch off | Below 1 V | |
Engine switch on (ACC) |
8.5 V or higher | |
Engine switch on (IG) |
8.5 V or higher |
| NG |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
OK | |
| |
| 15. |
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1-NO. 1, IG1-NO. 2, IG2-NO. 2, ACC RELAY) |
(a) Remove the instrument panel junction block assembly. Click here
(b) Connect all of the instrument panel junction block assembly connectors.
(c) Measure the voltage according to the value(s) in the table below.
|
*a | Component without harness connected
(Instrument Panel Junction Block Assembly) |
- | - |
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
4H-26 - Body ground | Engine switch on (ACC) |
11 to 14 V | |
4H-35 - Body ground | Engine switch on (IG) |
11 to 14 V | |
4F-2 - Body ground | Engine switch on (IG) |
11 to 14 V | |
4F-15 - Body ground | Engine switch on (IG) |
11 to 14 V |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
NG | |
| |
| 16. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) |
(a) Disconnect the 4D instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
4D-3 - Body ground | Always |
Below 1 Ω |
| OK |
| REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 17. |
INSPECT ENGINE SWITCH | (a) Remove the engine switch.
Click here (b) Inspect the engine switch.
Click here
| NG |
| REPLACE ENGINE SWITCH |
|
OK | |
| |
| 18. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH) |
(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-23 (SSW1) - G41-5 (SS1) |
Always | Below 1 Ω | |
G40-21 (SSW2) - G41-1 (SS2) |
Always | Below 1 Ω | |
G40-11 (AGND) - G41-6 (AGND) |
Always | Below 1 Ω | |
G40-23 (SSW1) or G41-5 (SS1) - Other terminals and body ground |
Always | 10 kΩ or higher | |
G40-21 (SSW2) or G41-1 (SS2) - Other terminals and body ground |
Always | 10 kΩ or higher | |
G40-11 (AGND) or G41-6 (AGND) - Other terminals and body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 19. |
INSPECT TRANSMITTER BATTERY | (a) Inspect the transmitter battery.
Click here NOTICE: Do
not wrap the lead wire ground a terminal, wedge it between terminals,
or solder it. The terminal may be deformed or damaged, and the
transmitter battery will not be able to be installed correctly.
| OK |
| REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY |
| NG |
| REPLACE TRANSMITTER BATTERY | | 
