Starting System: Testing and Inspection
THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (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" Smart Key System (for Start Function)
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 Key / Trouble Codes.
* The smart key system 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 key system is disabled through the customize function, enable the system before performing troubleshooting Smart Key System (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, registration must be performed Engine Immobiliser System (w/ Smart Key System).
* If the steering lock actuator assembly (steering lock ECU) is replaced, be sure to confirm that the steering lock is unlocked by turning the steering wheel to the left and right before starting the engine. If the steering lock is locked for any reason, open and close a door with the engine switch off, and then unlock the steering lock by pressing the engine switch. This prevents the engine from starting while the steering lock 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) Read the value using the Techstream (Power Supply Open).
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Smart Key / Data List.
(f) According to the display on the Techstream, read the Data List.
Smart Key
(g) Using the Techstream, confirm the output of DTCs for all systems.
Result
C -- GO TO STEERING LOCK SYSTEM (B2782) B2782
B -- GO TO DTC CHART Smart Key System (for Start Function)
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 switch with the brake pedal released and check that the power source mode changes.
Result
D -- GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) Power Source Mode does not Change to ON (ACC)
C -- GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) Power Source Mode does not Change to ON (IG)
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)
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
C -- GO TO SFI SYSTEM (PROBLEM SYMPTOMS TABLE) Symptom Related Diagnostic Procedures
B -- 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 Installation
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 A35 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 Key / Data List.
(e) According to the display on the Techstream, read the Data List.
Smart Key
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 lock unlocks when the engine switch is turned on (ACC).
OK:
The steering lock 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 Key / Data List.
(e) According to the display on the Techstream, read the Data List.
Smart Key
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 -- END
16. 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 / Smart Key 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.
17. 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
18. INSPECT PARK/NEUTRAL POSITION SWITCH
(a) Disconnect the B3 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.
19. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)
(a) Disconnect the A35 power management control ECU connector.
(b) Disconnect the B3 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
20. INSPECT STOP LIGHT SWITCH ASSEMBLY
(a) Disconnect the A2 stop light switch connector.
(b) Inspect the stop light switch assembly Testing and Inspection.
NG -- REPLACE STOP LIGHT SWITCH ASSEMBLY Removal
OK -- Continue to next step.
21. 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
22. REPLACE CERTIFICATION ECU
(a) Replace the certification ECU with a new one Removal.
(b) Perform the registration procedures Engine Immobiliser System (w/ Smart Key System).
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Key
NEXT -- END
23. 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 "OFF" (the steering lock is locked).
NG -- READ VALUE USING TECHSTREAM (L CODE CHECK)
OK -- GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL) Unable to Unlock Steering Wheel (Engine cannot Start)
24. 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 Key / Data List.
(e) According to the display on the Techstream, read the Data List.
Smart Key
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 certification ECU 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.
25. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) B2285
NEXT -- END
26. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(a) Replace the steering lock actuator assembly (steering lock ECU) with a new one Engine Immobiliser System (w/ Smart Key System).
(b) Perform the registration procedures Disassembly.
(c) Use the Data List to check if L code certification is functioning properly again.
Smart Key
OK:
OK (L code certification result normal) appears on the screen.
NG -- REPLACE CERTIFICATION ECU
OK -- END
27. REPLACE CERTIFICATION ECU
(a) Replace the certification ECU with a new one Engine Immobiliser System (w/ Smart Key System).
(b) Perform the registration procedures Removal.
(c) Use the Data List to check if S code certification is functioning properly again.
Smart Key
NEXT -- END