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
When the key is in the vehicle and the engine switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the shift lever is in P or N and the brake pedal is depressed, the engine can be started by pressing the engine switch.
HINT
* When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
* When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.
WIRING DIAGRAM
Refer to "System Diagram" System Diagram
INSPECTION PROCEDURE
NOTICE:
* When using the Techstream with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Access / Trouble Codes.
* The smart access system with push-button start uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting How to Proceed With Troubleshooting.
* If the smart access system with push-button start is disabled through the customize function, enable the system before performing troubleshooting Smart Access System With Push-Button Start (for Start Function).
* Inspect the fuses of circuits related to this system before performing the following inspection procedure.
* When replacing the steering lock actuator assembly (steering lock ECU), certification ECU or ID code box, registration must be performed Engine Immobilizer System.
* If the steering lock actuator assembly (steering lock ECU) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the engine. If the steering is locked for any reason, open and close a door with the engine switch off, and then unlock the steering by pressing the engine switch. This prevents the engine from starting while the steering is locked.
* After completing repairs, confirm that the problem does not occur.
HINT
Related Data List and Active Test Items
HINT
If the brake pedal is repeatedly depressed while the engine is stopped, the brake booster pressure is released and the force required to depress the brake pedal to illuminate the stop lights increases.
PROCEDURE
1. CHECK BATTERY
(a) Measure the battery voltage.
Standard voltage:
11 to 14 V
HINT
A simple method to determine whether the battery is depleted is to operate the horn.
NG -- GO TO CHARGING SYSTEM
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (POWER SUPPLY OPEN) AND CHECK FOR DTC
(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) According to the display on the Techstream, read the Data List.
Smart Access
(f) Using the Techstream, confirm the output of DTCs for all systems.
Result
B -- GO TO DTC CHART Smart Access System With Push-Button Start (for Start Function)
C -- GO TO STEERING LOCK SYSTEM (B2782) B2782
A -- Continue to next step.
3. CHECK ENGINE SWITCH CONDITION
(a) When the key is inside the vehicle and the shift lever is in P, push the engine with the brake pedal released switch and check that the power source mode changes.
Result
B -- GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) Power Source Mode does not Change to ON (IG and ACC)
C -- GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) Power Source Mode does not Change to ON (IG)
D -- GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) Power Source Mode does not Change to ON (ACC)
A -- Continue to next step.
4. CHECK CRANKING FUNCTION
(a) Get into the vehicle while carrying the key.
(b) Move the shift lever to P.
(c) Depress the brake pedal.
(d) Confirm that the engine switch indicator illuminates in green, and then press the engine switch and check that the engine cranks.
Result
B -- GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE) Symptom Related Diagnostic Procedures
C -- GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE) Symptom Related Diagnostic Procedures
A -- Continue to next step.
5. CHECK SECURITY INDICATOR LIGHT (ENGINE IMMOBILISER SYSTEM UNSET)
(a) Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while not depressing the brake pedal and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).
OK:
The security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).
HINT
If the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC), the engine immobiliser function can be presumed to be normal.
NG -- READ VALUE USING TECHSTREAM (S CODE CHECK)
OK -- Continue to next step.
6. CHECK ENGINE SWITCH INDICATOR LIGHT
(a) Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while depressing the brake pedal and check that the engine switch indicator changes.
OK:
The indicator illuminates in green.
HINT
If the engine switch indicator illuminates in green when the procedure above is performed, the P, N and brake signals can be considered to be normal.
NG -- READ VALUE USING TECHSTREAM (SHIFT P SIGNAL, NEUTRAL SW/ CLUTCH SW, SHIFT POSITION P OR N)
OK -- Continue to next step.
7. READ VALUE USING TECHSTREAM (STARTER SW)
(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 / Starting Control / Data List.
(e) Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while depressing the brake pedal and confirm that the Data List item changes.
Starting Control
OK:
The Data List item changes.
NG -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
OK -- Continue to next step.
8. INSPECT ST RELAY
(a) Remove the ST relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Reinstall the ST relay to the engine room relay block.
NG -- REPLACE ST RELAY
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)
(a) Disconnect the G38 power management control ECU connector.
(b) Move the shift lever to P or N.
(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
OK -- Continue to next step.
10. INSPECT STARTER ASSEMBLY
(a) Inspect the starter assembly Testing and Inspection.
NG -- REPLACE STARTER ASSEMBLY Removal
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER AND ENGINE ROOM RELAY BLOCK)
(a) Remove the starter assembly from the vehicle to perform an inspection.
(b) Remove the ST relay from the engine room relay block.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
12. READ VALUE USING TECHSTREAM (S CODE CHECK)
(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) According to the display on the Techstream, read the Data List.
Smart Access
OK:
OK (S code certification result normal) appears on the screen.
NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.
13. CHECK STEERING LOCK
(a) Check that the steering unlocks when the engine switch is turned on (ACC).
OK:
The steering unlocks.
NG -- READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH)
OK -- Continue to next step.
14. READ VALUE USING TECHSTREAM (IMMOBILISER)
(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) According to the display on the Techstream, read the Data List.
Smart Access
OK:
The Data List item changes to "unset" when the engine switch is turned on (ACC) or on (IG).
NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.
15. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)
(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) According to the display on the Techstream, read the Data List.
Power Source Control
OK:
The display changes in response to the operation of the engine switch.
NOTICE:
Make sure that the engine switch indicator is illuminated in green before pressing the engine switch.
NG -- REPLACE CERTIFICATION ECU Removal
OK -- Continue to next step.
16. REPLACE ID CODE BOX
(a) Replace the ID code box with a new one Removal.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Get into the vehicle while carrying the key, move the shift lever to P, press the engine switch while not depressing the brake pedal and check that the security indicator light stops blinking and turns off at the same time the power source mode changes to on (ACC).
NEXT -- END
17. READ VALUE USING TECHSTREAM (SHIFT P SIGNAL, NEUTRAL SW/ CLUTCH SW, SHIFT POSITION P OR N)
(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 or Starting Control / Data List.
(e) According to the display on the Techstream, read the Data List.
Power Source Control
Starting Control
OK:
The item in the Data List changes according to the shift position.
NG -- INSPECT PARK/NEUTRAL POSITION SWITCH
OK -- Continue to next step.
18. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)
(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) According to the display on the Techstream, read the Data List.
Power Source Control
OK:
The item in the Data List changes when the brake pedal is depressed and released.
NG -- INSPECT STOP LIGHT SWITCH ASSEMBLY
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
19. INSPECT PARK/NEUTRAL POSITION SWITCH
(a) Disconnect the C33 park/neutral position switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Removal
OK -- Continue to next step.
20. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)
(a) Disconnect the G38 power management control ECU connector.
(b) Disconnect the C33 park/neutral position switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Reconnect the park/neutral position switch connector.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
HINT
*: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
21. INSPECT STOP LIGHT SWITCH ASSEMBLY
(a) Disconnect the A5 stop light switch connector.
(b) Inspect the stop light switch assembly Component Tests and General Diagnostics.
NG -- REPLACE STOP LIGHT SWITCH ASSEMBLY Removal
OK -- Continue to next step.
22. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) B2284
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
23. REPLACE CERTIFICATION ECU
(a) Replace the certification ECU with a new one Removal.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Access
OK:
OK (S code certification result normal) appears on the screen.
NG -- REPLACE ID CODE BOX
OK -- END
24. REPLACE ID CODE BOX
(a) Replace the ID code box with a new one Removal.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Access
NEXT -- END
25. READ VALUE USING TECHSTREAM (STEERING UNLOCK SWITCH)
(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) According to the display on the Techstream, read the Data List.
Power Source Control
OK:
The item in the Data List indicates "ON" (the steering is unlocked).
NG -- READ VALUE USING TECHSTREAM (L CODE CHECK)
OK -- GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL) Unable to Lock Steering Wheel
26. READ VALUE USING TECHSTREAM (L CODE CHECK)
(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) According to the display on the Techstream, read the Data List.
Smart Access
OK:
The Data List item changes to "OK" when the key is inside the vehicle.
HINT
Reasons for verification failure:
* The steering lock ECU or ID code box is malfunctioning.
* There is a problem with the communication between ECUs.
* An ECU is replaced, but is not registered.
* An ECU is replaced with an ECU which has a code already stored in it.
NG -- REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
OK -- Continue to next step.
27. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(a) Replace the steering lock actuator assembly (steering lock ECU) with a new one Disassembly.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Turn the engine switch on (IG).
(d) Operate the steering wheel and check the steering condition.
NEXT -- END
28. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(a) Replace the steering lock actuator assembly (steering lock ECU) with a new one Disassembly.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Use the Data List to check if L code certification is functioning properly again.
Smart Access
OK:
OK (L code certification result normal) appears on the screen.
NG -- REPLACE ID CODE BOX Removal
OK -- END
29. REPLACE CERTIFICATION ECU
(a) Replace the certification ECU with a new one Removal.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Access
OK:
OK (S code certification result normal) appears on the screen.
NG -- REPLACE ID CODE BOX
OK -- END
30. REPLACE ID CODE BOX
(a) Replace the ID code box with a new one Removal.
(b) Perform the registration procedures Engine Immobilizer System.
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Access
NEXT -- END