DESCRIPTION When the
electrical key transmitter sub-assembly is in the cabin and the power
switch is pressed, the certification ECU (smart key ECU assembly)
receives a signal and changes the power source mode. Additionally, when
the shift lever is in P and the brake pedal is depressed, the hybrid
control system can be started by pressing the power switch. If the
steering is unlocked, the hybrid control system can also be started by
pressing the power switch with the shift lever in P and the brake pedal
depressed. Related Data List and Active Test Items |
Problem Symptom | Data List and Active Test | |
Power source mode does not change to ON (READY) | Power Source Control
- Stop Light Switch1
- Steering Unlock Switch
- Shift P Signal
- IG Relay Monitor (Inside)
- IG Relay Monitor (Outside)
- Latch Circuit
- Starter Request Signal
- Power Supply Condition
Smart Key
- Immobiliser
- Engine Start Request
- L Code Check
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the power 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, HV 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, HV Model) after
confirming that the communication systems are functioning properly.
Click here 
- If the smart key system (for Start Function, HV Model) has been canceled, 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
electrical key transmitter sub-assembly, refer to Registration.
Click here
- After completing repairs, confirm that the problem does not recur.
PROCEDURE |
1. | CHECK POWER SWITCH CONDITION |
(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.
(b) Move the shift lever to P. (c) With the brake pedal released, check that pressing the power switch causes the power source mode to change.
|
Result | Proceed to | |
Power source mode changes : Off → on (ACC) → on (IG) → off |
A | | Power source mode does not change to on (ACC) or on (IG) |
B | | Power source mode changes to on (IG) but not to on (ACC) |
C | | Power source mode changes to on (ACC) but not to on (IG) |
D |
| B |
 | GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG and ACC)) |
| C |
| GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (ACC)) |
| D |
| GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG)) |
|
A |
 | |
| 2. |
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) |
(a) Connect the Techstream to the DLC3. (b) Turn the power 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 | |
Stop Light Switch1 | State of brake pedal |
OFF or ON | OFF: Brake pedal released
ON: Brake pedal depressed |
- Use this item to determine if the stop light switch assembly is malfunctioning.
- The hybrid control system cannot be started when this item is OFF.
- If the stop light switch assembly is malfunctioning, the hybrid control
system can be started by pressing and holding the power switch for a
certain period of time.
| Body Electrical > Power Source Control > Data List
|
Tester Display | | Stop Light Switch1 |
OK: The Techstream display changes correctly in response to the brake pedal operation.
| NG |
| GO TO STEP 7 |
|
OK | |
| |
| 3. |
READ VALUE USING TECHSTREAM (SHIFT P SIGNAL) |
(a) Enter the following menus: Body Electrical / Power Source Control / Data List.
(b) 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 | |
Shift P Signal | Shift position P |
OFF or ON | OFF: Shift lever not in P
ON: Shift lever in P | Use this item to determine whether the shift lever position switch (P) is malfunctioning. | Body Electrical > Power Source Control > Data List
|
Tester Display | | Shift P Signal |
OK: The Techstream display changes correctly in response to the shift lever operation.
| NG |
| GO TO STEP 9 |
|
OK | |
| |
| 4. |
READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL) |
(a) Enter the following menus: Body Electrical / Power Source Control / Data List.
(b) 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 | |
Starter Request Signal |
Hybrid control system start request signal status |
OFF or ON | OFF: The power switch is not pressed
ON: With the shift lever in P and the brake pedal depressed, the power switch is pressed and held |
- When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed.
- When the power switch is pressed, the duration of time that ON is
displayed will be extremely short. As such, the power switch needs to be
pressed and held for a certain period of time.
| Body Electrical > Power Source Control > Data List
|
Tester Display | | Starter Request Signal |
NOTICE: Check
that the key indicator display is displayed on the multi-information
display in the combination meter assembly, and then press the power
switch. OK: The Techstream display changes correctly in response to the power switch operation.
| NG |
| GO TO STEP 10 |
|
OK | |
| |
| 5. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - HYBRID VEHICLE CONTROL ECU) |
(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the G46 hybrid vehicle control ECU connector. (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-27 (ST2) - G46-9 (ST2) |
Always | Below 1 Ω | |
G40-27 (ST2) or G46-9 (ST2) - Other terminals and body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 6. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Connect the G40 certification ECU (smart key ECU assembly) connector.
(b) Connect the G46 hybrid vehicle control ECU connector.
| (c) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G40-27 (ST2) - Body ground |
With
the brake pedal depressed, the power switch is pressed and held → After
approx. 3 sec. has elapsed, the power switch is released |
8.5 V or higher → 1.0 V or less | |
 |
|
*a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) | | |
| OK |
| GO TO HYBRID CONTROL SYSTEM |
| NG |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| 7. |
CHECK STOP LIGHT SWITCH ASSEMBLY | (a) Check the stop light switch assembly.
Click here
| NG |
| REPLACE STOP LIGHT SWITCH ASSEMBLY |
|
OK | |
| |
| 8. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) |
(a) Disconnect the A33 stop light switch assembly connector. (b) Disconnect the K10 certification ECU (smart key ECU assembly) connector.
(c) Disconnect the A23 hybrid vehicle control ECU connector. (d) Disconnect the G21 shift lock control unit assembly connector.
(e) Disconnect the A35 skid control ECU (brake booster with master cylinder assembly) connector.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K10-25 (STP1) - A33-3 (L) |
Always | Below 1 Ω | |
K10-25 (STP1) or A33-3 (L) - 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 |
| 9. |
CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY |
| (a) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G40-22 (P) - Body ground |
Shift lever in P → Shift lever not in P |
9 V or higher → 2.76 V or less | |
 |
|
*a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) | | |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| GO TO STEP 12 |
| 10. |
CHECK STEERING LOCK FUNCTION | (a) Check that the steering unlocks when the power switch is turned on (ACC).
OK: The steering unlocks.
| NG | |
GO TO OTHER PROBLEM (Unable to Unlock Steering Wheel (Hybrid Control System cannot Start)) |
|
OK | |
| |
| 11. |
CHECK SECURITY INDICATOR LIGHT (IMMOBILISER FUNCTION UNSET) |
(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.
(b) Move the shift lever to P. (c)
Press the power switch with the brake pedal released and check that the
security indicator light changes from blinking to off at the same time
that the power source mode changes to on (ACC). OK: The security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).
HINT: The
immobiliser function can be determined to be operating correctly if the
security indicator light changes from blinking to off at the same time
that the power source mode changes to on (ACC).
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| GO TO OTHER PROBLEM (Immobiliser System does not Operate Properly) |
| 12. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SHIFT LOCK CONTROL UNIT ASSEMBLY) |
(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the G21 shift lock control unit assembly connector. (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G40-22 (P) - G21-3 (P2) |
Always | Below 1 Ω | |
G40-22 (P) or G21-3 (P2) - Other terminals and body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
