THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) Power Source Mode does not Change to ON (IG and ACC)
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) 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).
| 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 ·
Start Switch3 ·
IG Relay Monitor (Inside) ·
ACC Relay Monitor ·
IG Relay Monitor (Outside) ·
Latch Circuit ·
Power Supply Condition Starting Control
·
Ignition |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
·Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
·If the smart entry and start system (for Start Function) has been disabled, enable the system before performing troubleshooting.
·Inspect the fuses for 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 Service Bulletin.
·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 > Entry&Start > Utility
-
Tester Display Operation History - 50005 125 52
PROCEDURE
Get into the vehicle while carrying the electrical key transmitter sub-assembly that has already been registered.
Move the shift lever to P.
Press the engine switch with the brake pedal released and check that the power source mode changes.
- Result:
Result Proceed to Power source mode cannot be changed when electrical key transmitter sub-assembly is in push button start function operation range for front side or rear side A Power source mode cannot be changed B Power source mode can be changed C
A
B
C
Install the transmitter battery to the electrical key transmitter sub-assembly.
Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor) and perform a smart entry and start system check.
- 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.
- Result:
Proceed to OK NG
OK
NG
Check the following antennas in key diagnostic mode.
| *a | Inspection Point |
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 combination meter buzzer sounds.
- HINT:
- ·
Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
·If the combination meter 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 No. 1 indoor electrical key antenna assembly (front floor, rear floor or inside luggage compartment) is operating by the sounding of the combination meter buzzer.
·When the combination meter 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 combination meter 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 > Entry&Start > Utility
-
Tester Display Communication Check(Key Diag Mode) - 50005 125 143
- Result:
Result Proceed to The combination meter buzzer does not sound A The combination meter buzzer sounds B
A
B
Disconnect the I1 certification ECU (smart key ECU assembly) connector.
Disconnect the I34 No. 1 indoor electrical key antenna assembly (front floor) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition I1-8 (CLG5) - I34-1 (ANTE5) Always Below 1 Ω I1-9 (CG5B) - I34-2 (CLGB) Always Below 1 Ω I1-8 (CLG5) or I34-1 (ANTE5) - Other terminals and body ground Always 10 kΩ or higher I1-9 (CG5B) or I34-2 (CLGB) - Other terminals and body ground Always 10 kΩ or higher
Reconnect the I1 certification ECU (smart key ECU assembly) connector.
- Result:
Proceed to OK NG
OK
NG
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 I34-1 (ANTE5) - I34-2 (CLGB) Procedure:
1.Engine switch off
2.Electrical key transmitter sub-assembly not inside vehicle
3.Within 30 seconds of closing any door
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform)
- Result:
Proceed to OK NG
OK
NG
Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.
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.
·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:
Result Proceed to LED illuminates 3 times or more when switch is pressed and held*1 A LED illuminates 3 times or more when switch is pressed and held*2 B LED does not illuminate when switch is pressed and held C LED illuminates once or twice but not a third time D
*1: w/ Entry Function
*2: w/o Entry Function
A
B
C
D
Check that the entry lock and unlock functions operate on each door.
- 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:
Result Proceed to Entry functions operate normally for all doors A An entry function does not operate normally for a door B
A
B
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control / Data List.
Read the Data List according to the display on the GTS.
- 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·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 Switch3 Engine switch 3 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.
- Body Electrical > Power Source Control > Data List
-
Tester Display Start Switch1 Start Switch2 Start Switch3 - 50003 223 4,5,57
- OK:
The value of "Start Switch1", "Start Switch2" and "Start Switch3" change correctly in response to the engine switch operation.
- Result:
Proceed to OK NG
OK
NG
Measure the voltage while checking the Data List on the GTS.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control / Data List.
Read the Data List according to the display on the GTS.
| *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 - 50003 223 18
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition I1-15 (IG1D) - Body ground Engine switch off Below 1 V Engine switch on (ACC) Below 1 V Engine switch on (IG) 9 V or higher I1-16 (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
- Result:
Proceed to OK NG
OK
NG
Remove the driver side junction block assembly.
Connect all of the driver side junction block assembly connectors.
Measure the voltage according to the value(s) in the table below.
| *a | Component with harness connected
(Driver Side Junction Block Assembly) |
- | - |
- Standard Voltage:
Tester Connection Condition Specified Condition 4A-26 - Body ground Engine switch on (ACC) 11 to 14 V 4B-14 - Body ground Engine switch on (IG) 11 to 14 V 4B-2 - Body ground Engine switch on (IG) 11 to 14 V 4B-15 - Body ground Engine switch on (IG) 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the 4F driver side junction block assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 4F-3 - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Inspect the transmitter battery.
- 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.
- Result:
Proceed to OK NG
OK
NG
Remove the engine switch.
Inspect the engine switch.
- Result:
Proceed to OK NG
OK
NG
Disconnect the I1 certification ECU (smart key ECU assembly) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition I1-23 (SSW1) - I35-12 (SS1) Always Below 1 Ω I1-20 (SSW2) - I35-6 (SS2) Always Below 1 Ω I1-13 (SSW3) - I35-11 (SS3) Always Below 1 Ω I1-11 (AGND) - I35-3 (GND) Always Below 1 Ω I1-23 (SSW1) or I35-12 (SS1) - Other terminals and body ground Always 10 kΩ or higher I1-20 (SSW2) or I35-6 (SS2) - Other terminals and body ground Always 10 kΩ or higher I1-13 (SSW3) or I35-11 (SS3) - Other terminals and body ground Always 10 kΩ or higher I1-11 (AGND) or I35-3 (GND) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG