Engine Does Not Start

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): Engine does not Start
- Engine does not Start

DESCRIPTION

1. ENGINE START SYSTEM FUNCTION

(a) for AT:

If the engine switch is pressed with the shift lever in P or N and the brake pedal depressed, the power source control ECU determines that it is an engine start request.

for MT:

If the engine switch is pressed with the clutch pedal depressed, the power source control ECU determines that it is an engine start request.

(b) The certification ECU (smart key ECU assembly) and other ECUs perform key verification via the LIN communication line.

(c) The power source control ECU activates the ACC relay.

(d) The power source control ECU activates the IG1 and IG2 relays.

(e) The certification ECU (smart key ECU assembly) outputs a steering UNLOCK signal. The signal is sent to the power source control ECU via the steering lock ECU.

(f) The power source control ECU sends an engine start request signal to the ECM.

(g) The ECM sends an ACC cut request signal to the power source control ECU.

(h) The ECM and power source control ECU activate the starter relay.

(i) The power source control ECU deactivates the ACC relay until the power source control ECU detects an engine start.

WIRING DIAGRAM

See Cranking Holding Function Circuit (for 2GR-FSE: Cranking Holding Function Circuit, for 4GR-FSE: Cranking Holding Function Circuit).

INSPECTION PROCEDURE

1. EMERGENCY ENGINE START CONTROL

(a) If there is a malfunction in the stop light switch or STOP fuse, their signals may not be correctly transmitted to the power source control ECU. This may result in the engine not starting even if the engine switch is pressed while the brake pedal is depressed and the shift lever is in P.

To activate the starter:

(1) Turn the engine switch from off to on (ACC).

(2) Hold pressing and hold the engine switch for 15 seconds.

HINT
After the certification ECU (smart key ECU assembly), steering lock ECU, ID code box (immobilizer code ECU) and/or ECM are/is replaced, perform the registration procedures for the engine immobilizer system Engine Immobilizer System.

PROCEDURE

1. CHECK THE ENGINE SWITCH CONDITION

(a) Check the power source mode changes.

(1) for AT:

When the key is inside the vehicle and the shift lever is in P, check that the power source mode changes.

for MT:

When the key is inside the vehicle, check that the power source mode changes.

OK:

off -> on (ACC) -> on (IG) -> off

NG -- GO TO OTHER FLOW CHART (POWER SOURCE MODE DOES NOT CHANGE) Power Source Mode Does Not Change
OK -- Continue to next step.

2. CHECK DTC

(a) Clear the DTCs Smart Access System With Push-Button Start (for Start Function).

(b) Check for DTCs again.

(c) Proceed to the next step based on the inspection result.

Result:

E -- GO TO DIAGNOSTIC TROUBLE CODE CHART (VEHICLE STABILITY CONTROL SYSTEM) Vehicle Stability Control System

D -- GO TO DIAGNOSTIC TROUBLE CODE CHART (ENGINE IMMOBILIZER SYSTEM) Engine Immobilizer System

C -- GO TO DIAGNOSTIC TROUBLE CODE CHART (STEERING LOCK SYSTEM) Steering Lock System

B -- GO TO DIAGNOSTIC TROUBLE CODE CHART (SMART ACCESS SYSTEM WITH PUSH-BUTTON START) Smart Access System With Push-Button Start (for Start Function)
A -- Continue to next step.

3. CHECK CRANKING FUNCTION

(a) Check the engine cranking function.

(1) for AT:

When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch crank the engine.

for MT:

When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

OK:

Engine cranks.

NG -- CHECK STEERING LOCK
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (ENGINE START REQUEST)

(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 / Smart Access / Data List.

(e) Read the Data List according to the display on the Techstream.

HINT
When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

Smart Access

OK:

"OK" (received) and "NG" (not received) appear on the screen according to vehicle operating conditions.

NG -- REGISTER RECOGNITION CODE (ECU CODE)
OK -- Continue to next step.

5. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU)

(a) Replace the ID code box (immobilizer code ECU) Engine Immobilizer System.

NEXT -- Continue to next step.

6. REGISTER RECOGNITION CODE (ECU CODE)

(a) Register the recognition code (ECU code) Engine Immobilizer System.

NEXT -- Continue to next step.

7. ECU COMMUNICATION ID REGISTRATION

(a) Register the ECU communication ID Engine Immobilizer System.

NEXT -- Continue to next step.

8. CHECK IF THE ENGINE START

(a) Check the engine cranking function.

(1) for AT:

When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch crank the engine.

for MT:

When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

OK:

Engine can be started.

NG -- GO TO SFI SYSTEM SFI System

OK -- END (ID CODE BOX (IMMOBILIZER CODE ECU WAS DEFECTIVE)

9. CHECK STEERING LOCK

(a) Check if the steering lock is released when turning the engine switch on (ACC).

OK:

The steering lock is released.

NG -- GO TO STEERING LOCK SYSTEM Steering Lock System
OK -- Continue to next step.

10. READ VALUE USING TECHSTREAM (S CODE)

(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 / Smart Access / Data List.

(e) Read the Data List according to the display on the Techstream.

HINT
When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

Smart Access

OK:

"OK" is displayed on the screen.

NG -- REGISTER RECOGNITION CODE (ECU CODE)
OK -- Continue to next step.

11. READ VALUE USING TECHSTREAM (L CODE)

(a) Read the Data List according to the display on the Techstream.

HINT
When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

Smart Access

Result:

OK:

"OK" is displayed on the screen.

C -- KEY REGISTRATION

B -- READ VALUE USING TECHSTREAM (PARK/NEUTRAL POSITION SWITCH OR CLUTCH PEDAL SWITCH)
A -- Continue to next step.

12. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)

(a) Read the Data List according to the display on the Techstream.

Smart Key

OK:

OK (brake pedal depressed) and OFF (brake pedal released) appear on the screen according to vehicle operating conditions.

NG -- INSPECT STOP LIGHT SWITCH ASSEMBLY
OK -- Continue to next step.

13. READ VALUE USING TECHSTREAM (PARK/NEUTRAL POSITION SWITCH OR CLUTCH PEDAL SWITCH)

(a) Enter the following menus: Body / Power Source Control / Data List.

(b) Read the Data List according to the display on the Techstream.

Power Source Control

Result:

C -- INSPECT CLUTCH SWITCH ASSEMBLY

B -- CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL SWITCH)
A -- Continue to next step.

14. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ECM)

(a) Disconnect the J55 connector from the power source control ECU.

(b) Disconnect the A5 connector from the ECM.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - ECM)
OK -- Continue to next step.

15. CHECK POWER SOURCE CONTROL ECU

(a) Reconnect the J55 connector to the power source control ECU.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE POWER SOURCE CONTROL ECU Removal

OK -- GO TO SFI SYSTEM Symptom Related Diagnostic Procedures

16. KEY REGISTRATION

(a) Register the key Engine Immobilizer System.

NEXT -- Continue to next step.

17. CHECK IF ENGINE START

(a) The shift lever is in P.

(b) Open and close the driver door with the engine switch off.

(c) Check if the engine can be started.

OK:

Engine can be started.

HINT
After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.

NG -- REPLACE STEERING LOCK ACTUATOR

OK -- END

18. REPLACE STEERING LOCK ACTUATOR

(a) Replace the steering lock actuator Disassembly.

NEXT -- Continue to next step.

19. REGISTER RECOGNITION CODE (ECU CODE)

(a) Register the recognition code (ECU code) Engine Immobilizer System.

NEXT -- Continue to next step.

20. CHECK IF ENGINE START

(a) The shift lever is in P.

(b) Open and close the driver door with the engine switch off.

(c) Check if the engine can be started.

OK:

Engine can be started.

HINT
After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.

NG -- REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) Removal

OK -- END (STEERING LOCK ECU WAS DEFECTIVE)

21. REGISTER RECOGNITION CODE (ECU CODE)

(a) Register the recognition code (ECU code) Engine Immobilizer System.

NEXT -- Continue to next step.

22. CHECK IF ENGINE START

(a) Check the engine cranking function.

(1) for AT:

When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch crank the engine.

for MT:

When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

OK:

Engine can be started.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK -- END

23. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Replace the certification ECU (smart key ECU assembly) Removal.

NEXT -- Continue to next step.

24. KEY REGISTRATION

(a) Register the key Engine Immobilizer System.

NEXT -- Continue to next step.

25. CHECK IF ENGINE START

(a) Check the engine cranking function.

(1) for AT:

When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch crank the engine.

for MT:

When there is fuel in the fuel tank, the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch crank the engine.

OK:

Engine can be started.

NG -- REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) Removal

OK -- END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

26. INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Remove the stop light switch Removal.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE STOP LIGHT SWITCH Removal
OK -- Continue to next step.

27. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH)

(a) Disconnect the J55 connector from the power source control ECU.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH)

OK -- REPLACE POWER SOURCE CONTROL ECU Removal

28. INSPECT STARTER RELAY

(a) Remove the starter relay from the engine room relay block No. 1.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

C -- REPLACE STARTER RELAY

B -- INSPECT CLUTCH SWITCH ASSEMBLY
A -- Continue to next step.

29. CHECK PARK/NEUTRAL POSITION SWITCH

(a) Disconnect the E45 connector from the park/neutral position switch.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPLACE PARK/NEUTRAL POSITION SWITCH Removal
OK -- Continue to next step.

30. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL SWITCH)

(a) Disconnect the J55 connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)
OK -- Continue to next step.

31. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - STARTER RELAY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER SOURCE CONTROL ECU Removal

32. INSPECT CLUTCH SWITCH ASSEMBLY

(a) Inspect the clutch pedal switch .

NG -- REPLACE CLUTCH PEDAL SWITCH ASSEMBLY
OK -- Continue to next step.

33. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - CLUTCH START SWITCH)

(a) Disconnect the J55 connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - CLUTCH START SWITCH)
OK -- Continue to next step.

34. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - STARTER RELAY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH START SWITCH - STARTER RELAY)

OK -- REPLACE POWER SOURCE CONTROL ECU Removal