THEFT DETERRENT / KEYLESS ENTRY ENTRY AND START SYSTEM(for Start Function) Engine does not Start
DESCRIPTION
When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift state is park (P) and the brake pedal is depressed, the engine can be started by pressing the engine switch. If the steering is unlocked, the engine can also be started by pressing the engine switch with the shift state park (P) and the brake pedal depressed.
| Problem Symptom | Data List and Active Test |
|---|---|
| Engine does not Start | Power Source Control
·
Stop Light Switch1 ·
Steering Unlock Switch ·
Shift P Signal Pulse ·
IG Relay Monitor (Inside) ·
IG Relay Monitor (Outside) ·
Latch Circuit ·
Starter Request Signal ·
Power Supply Condition Entry&Start
·
Immobiliser ·
Engine Start Request ·
S Code Check ·
L Code Check Starting Control
·
Starter SW ·
Shift Position Status ·
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. 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.
·If the entry and start system (for Start Function) has been canceled, enable the system before performing troubleshooting.
·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 the Service Bulletin.
·After completing repairs, confirm that the problem does not recur.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
·After the engine switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
·When disconnecting and reconnecting the battery
- HINT:
-
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
PROCEDURE
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Change the shift state to park (P).
With the brake pedal released, check that pressing the engine switch causes the power source mode to change.
- Result:
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
A
B
C
D
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 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 engine cannot be started when this item is OFF.
·If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.
- Body Electrical > Power Source Control > Data List
-
Tester Display Stop Light Switch1 - 50003 223 3
- OK:
The GTS display changes correctly in response to the brake pedal operation.
- Result:
Proceed to OK NG
OK
NG
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 Shift P Signal State of brake pedal ON or OFF ON: Shift state park (P)
OFF: Shift state not park (P)·Use this item to determine if the shift position switch is malfunctioning.
·The engine cannot be started when this item is OFF.
- Body Electrical > Power Source Control > Data List
-
Tester Display Shift P Signal - 50003 223 1
- OK:
The GTS display changes correctly in response to the shift state.
- Result:
Proceed to OK NG
OK
NG
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 Neutral SW/ Clutch SW Shift position (P, N) ON or OFF ON: Shift state park (P) or (N)
OFF: Shift state not park (P) or (N)·Use this item to determine whether the park/neutral position switch assembly is malfunctioning.
·When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.
- Body Electrical > Power Source Control > Data List
-
Tester Display Neutral SW/ Clutch SW - 50003 223 6
Enter the following menus: Body Electrical / Starting Control / Data List.
Read the Data List according to the display on the GTS.
- Body Electrical > Starting Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Shift Position P or N Park/Neutral position switch status OFF or ON OFF: Shift state not park (P) or (N)
ON: Shift state park (P) or (N)When OFF is displayed, the engine will not crank.
- Body Electrical > Starting Control > Data List
-
Tester Display Shift Position P or N - 50003 221 2
- OK:
The GTS display changes correctly in response to the shift state.
- Result:
Proceed to OK NG
OK
NG
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 Starter Request Signal Engine start request signal status OFF or ON OFF: The engine switch is not pressed
ON: With the shift state park (P) and the brake pedal depressed, the engine switch is pressed and held·When the engine cannot be started due to a start request signal malfunction, OFF is displayed.
·When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine 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 - 50003 223 12
- NOTICE:
-
Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the engine switch.
- OK:
The GTS display changes correctly in response to the engine switch operation.
- Result:
Proceed to OK NG
OK
NG
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Change the shift state to park (P).
Enter the following menus: Body Electrical / Starting Control / Data List.
Read the Data List while pressing the engine switch with the brake pedal depressed according to the display on the GTS.
- Body Electrical > Starting Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Starter SW Starter operation request OFF or ON OFF: Starter operation not requested
ON: Starter operation requestedWhen OFF is displayed, the engine will not crank.
- Body Electrical > Starting Control > Data List
-
Tester Display Starter SW - 50003 221 1
- OK:
The GTS display changes.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER Relay Installation Terminal) |
Remove the STARTER relay.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition STARTER relay installation terminal 5 - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Remove the STARTER relay.
Inspect the STARTER relay.
for 7GR-FKS:
for 1GD-FTV:
- Result:
Proceed to OK (w/ Stop and Start System) OK (w/o Stop and Start System) NG
OK (w/ Stop and Start System)
OK (w/o Stop and Start System)
NG
Disconnect the E44 starter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER relay installation terminal 3 - E44-1 (SL1) Always Below 1 Ω STARTER relay installation terminal 3 or E44-1 (SL1) - Other terminals and body ground Always 10 kΩ or higher
Connect the E44 starter assembly connector.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER No. 2 Relay Installation Terminal) |
Remove the STARTER NO. 2 relay.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition STARTER NO. 2 relay installation terminal 2 - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER No. 2 Relay Installation Terminal) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER NO. 2 relay installation terminal 1 - Body ground Always Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition STARTER NO. 2 relay installation terminal 5 - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Remove the STARTER NO. 2 relay.
Inspect the STARTER NO. 2 relay.
- Result:
Proceed to OK NG
OK
NG
Disconnect the E23 and E44 starter assembly connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER NO. 2 relay installation terminal 3 - E44-2 (SL2) Always Below 1 Ω STARTER NO. 2 relay installation terminal 3 - E23-1 (ST) Always Below 1 Ω STARTER NO. 2 relay installation terminal 3 or E44-2 (SL2) - Other terminals and body ground Always 10 kΩ or higher STARTER NO. 2 relay installation terminal 3 or E23-1 (ST) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Starter Assembly) |
Disconnect the starter assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition F3-1 (B) - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the N32 engine stop and start ECU connector.
Disconnect the N2 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER NO. 2 relay installation terminal 2 - N32-23 (STA2) Always Below 1 Ω STARTER NO. 2 relay installation terminal 2 - N2-22 (STA) Always Below 1 Ω STARTER NO. 2 relay installation terminal 2 or N32-23 (STA2) - Other terminals and body ground Always 10 kΩ or higher STARTER NO. 2 relay installation terminal 2 or N2-22 (STA) - Other terminals and body ground Always 10 kΩ or higher
Connect the N32 engine stop and start ECU connector.
Install the STARTER NO. 2 relay.
- Result:
Proceed to OK NG
OK
NG
| *a | Component without harness connected
(Engine Stop and Start ECU) |
- | - |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N32-23 (STA2) - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
Disconnect the E21 starter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER relay installation terminal 3 - E21-1 (ST) Always Below 1 Ω STARTER relay installation terminal 3 or E21-1 (ST) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Starter Assembly) |
Disconnect the starter assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition F1-1 (B) - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
for 7GR-FKS:
for 1GD-FTV (for 2.0 kW Type):
for 1GD-FTV (for 3.0 kW Type):
NG
Check that the steering unlocks when the engine switch is turned on (ACC).
- OK:
The steering unlocks.
- Result:
Proceed to OK NG
OK
NG
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Change the shift state to park (P).
Press the engine 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).
- Result:
Proceed to OK NG
OK
NG
for 7GR-FKS:
Disconnect the N1 ECM connector.
for 1GD-FTV:
Disconnect the N2 ECM connector.
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 Neutral SW/ Clutch SW Shift position (P, N) ON or OFF ON: Shift state park (P) or (N)
OFF: Shift state not park (P) or (N)·Use this item to determine whether the park/neutral position switch assembly is malfunctioning.
·When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.
- Body Electrical > Power Source Control > Data List
-
Tester Display Neutral SW/ Clutch SW - 50003 223 6
Enter the following menus: Body Electrical / Starting Control / Data List.
Read the Data List according to the display on the GTS.
- Body Electrical > Starting Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Shift Position P or N Park/Neutral position switch status OFF or ON OFF: Shift state not park (P) or (N)
ON: Shift state park (P) or (N)When OFF is displayed, the engine will not crank.
- Body Electrical > Starting Control > Data List
-
Tester Display Shift Position P or N - 50003 221 2
- OK:
The GTS display changes correctly in response to the shift state.
- Result:
Proceed to OK NG (w/ Stop and Start System) NG (w/o Stop and Start System)
OK
for 7GR-FKS:
for 1GD-FTV:
NG (w/ Stop and Start System)
NG (w/o Stop and Start System)
Disconnect the N32 engine stop and start ECU connector.
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 Neutral SW/ Clutch SW Shift position (P, N) ON or OFF ON: Shift state park (P) or (N)
OFF: Shift state not park (P) or (N)·Use this item to determine whether the park/neutral position switch assembly is malfunctioning.
·When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.
- Body Electrical > Power Source Control > Data List
-
Tester Display Neutral SW/ Clutch SW - 50003 223 6
Enter the following menus: Body Electrical / Starting Control / Data List.
Read the Data List according to the display on the GTS.
- Body Electrical > Starting Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Shift Position P or N Park/Neutral position switch status OFF or ON OFF: Shift state not park (P) or (N)
ON: Shift state park (P) or (N)When OFF is displayed, the engine will not crank.
- Body Electrical > Starting Control > Data List
-
Tester Display Shift Position P or N - 50003 221 2
- OK:
The GTS display changes correctly in response to the shift state.
- Result:
Proceed to OK NG
OK
NG
Remove the park/neutral position switch assembly.
Inspect the park/neutral position switch assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the N154 certification ECU (smart key ECU assembly) connector.
Disconnect the E92 park/neutral position switch assembly connector.
Remove the STARTER relay.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N154-9 (STAR) - E92-4 (B) Always Below 1 Ω N154-20 (STA) - E92-5 (L) Always Below 1 Ω N154-9 (STAR) or E92-4 (B) - Other terminals and body ground Always 10 kΩ or higher N154-20 (STA) or E92-5 (L) - Other terminals and body ground Always 10 kΩ or higher
Connect the N154 certification ECU (smart key ECU assembly) connector.
Connect the E92 park/neutral position switch assembly connector.
Install the STARTER relay.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N154-9 (STAR) - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
Remove the STARTER relay.
Inspect the STARTER relay.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER Relay Installation Terminal) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition STARTER relay installation terminal 2 - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER Relay Installation Terminal) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER relay installation terminal 1 - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the park/neutral position switch assembly.
Inspect the park/neutral position switch assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the N154 certification ECU (smart key ECU assembly) connector.
Disconnect the E92 park/neutral position switch assembly connector.
Remove the STARTER relay.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N154-9 (STAR) - E92-4 (B) Always Below 1 Ω N154-20 (STA) - E92-5 (L) Always Below 1 Ω N154-9 (STAR) or E92-4 (B) - Other terminals and body ground Always 10 kΩ or higher N154-20 (STA) or E92-5 (L) - Other terminals and body ground Always 10 kΩ or higher
Connect the N154 certification ECU (smart key ECU assembly) connector.
Connect the E92 park/neutral position switch assembly connector.
Install the STARTER relay.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N154-9 (STAR) - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
Remove the STARTER relay.
Inspect the STARTER relay.
for 7GR-FKS:
for 1GD-FTV:
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER Relay Installation Terminal) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition STARTER relay installation terminal 2 - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
| *a | No. 1 Engine Room Relay Block
(STARTER Relay Installation Terminal) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition STARTER relay installation terminal 1 - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N156-22 (P) - Other terminals and body ground Shift state park (P) → Shift state not park (P) 9 V or higher → 2.76 V or less
- Result:
Proceed to OK NG
OK
NG
Disconnect the N156 certification ECU (smart key ECU assembly) connector.
Disconnect the N161 shift lock control unit assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N156-22 (P) - N161-3 (P2) Always Below 1 Ω N156-22 (P) or N161-3 (P2) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Reconnect the certification ECU (smart key ECU assembly) connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition N156-22 (P) - Other terminals and body ground Shift state park (P) 9 V or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Stop Light Switch Assembly) |
Disconnect the stop light switch assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition M2-7 (B) - Body ground Always 11 to 14 V
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition M2-2 (GND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Inspect the stop light switch assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the N155 certification ECU (smart key ECU assembly) connector.
for 7GR-FKS:
Disconnect the N1 ECM connector.
for 1GD-FTV:
Disconnect the A2 ECM connector.
Disconnect the N161 shift lock control unit assembly connector.
Disconnect the A28 skid control ECU assembly connector.
Disconnect the M2 stop light switch assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N155-25 (STP1) - M2-3 (L) Always Below 1 Ω N155-25 (STP1) or M2-3 (L) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG