Engine does not Start: Procedure

1. 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: Go to next step 

1. Read the value using the Techstream (Power Supply Open).
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / Smart Key / Data List.
6. According to the display on the Techstream, read the Data List.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Power Supply Open	Record of malfunction of signal sent to steering lock actuator assembly (motor) from power management control ECU (open circuit) (DTC B2782 stored)/NG (PAST) or OK	NG (PAST): Record of malfunction (open circuit) exists OK: No record of malfunction (open circuit)	This item records malfunctions in the circuit between the power management control ECU and steering lock actuator assembly (motor).

7. Using the Techstream, confirm the output of DTCs for all systems.
   RESULT
   
   

   Result	Proceed to
   No DTC is output and power supply open has not occurred in past	A
   DTCs are output (except DTC B2782)	B
   Power supply open has occurred in past and/or DTC B2782 is output	C

B → See step   28 

C → See step   29 

A: Go to next step 

1. 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
   
   

   Result	Proceed to
   Power source mode changes as follows (normal): off → on (ACC) → on (IG) → off	A
   Power source mode does not change to on (IG) or on (ACC)	B
   Power source mode does not change to on (IG) but does change to on (ACC)	C
   Power source mode does not change to on (ACC) but does change to on (IG)	D

B → See step   30 

C → See step   31 

D → See step   32 

A: Go to next step 

1. Get into the vehicle while carrying the key.
2. Move the shift lever to P.
3. Depress the brake pedal.
4. Confirm that the engine switch indicator illuminates in green, and then press the engine switch and check that the engine cranks.
   RESULT
   
   

   Result	Proceed to
   Engine does not crank	A
   Engine cranks, but there is not initial combustion	B
   Engine cranks, but is difficult to start	C

B → See step   33 

C → See step   34 

A: Go to next step 

1. 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 → See step   12 

OK: Go to next step 

1. 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 → See step   16 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Starting Control / Data List.
5. 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
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter SW	Power management control ECU starter activation command/ON or OFF	ON: Starter on OFF: Starter off	When there is a malfunction, the engine cannot be cranked.

   OK

   The Data List item changes.

NG → See step   35 

OK: Go to next step 

1. Remove the ST relay from the engine room relay block.
   Fig 1: Identifying DRL No. 2 Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Battery voltage not applied	10 kΩ or higher
   	Battery voltage applied to terminals 1 and 2	Below 1 Ω

3. Reinstall the ST relay to the engine room relay block.

NG → REPLACE ST RELAY 

OK: Go to next step 

1. Disconnect the A35 power management control ECU connector.
   Fig 2: Checking A35 Power Management Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Move the shift lever to P or N.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A35-3 (STAR) - Body ground	20°C (68°F)	93.8 to 136.4 Ω
   A35-2 (STA) - Body ground

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the starter assembly. Refer to INSPECTION .

NG → See step   36 

OK: Go to next step 

1. Remove the starter assembly from the vehicle to perform an inspection.
2. Remove the ST relay from the engine room relay block.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   h1-1 - Body ground	Always	11 to 14 V
   5 - Body ground	Always	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - B6-1	Always	Below 1 Ω
   3 or B6-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   37 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key / Data List.
5. According to the display on the Techstream, read the Data List.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU NG or OK	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started).

   OK

   OK (S code certification result normal) appears on the screen.

NG → See step   22 

OK: Go to next step 

1. Check that the steering lock unlocks when the engine switch is turned on (ACC).

   OK

   The steering lock unlocks.

NG → See step   23 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key / Data List.
5. According to the display on the Techstream, read the Data List.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Immobiliser	State of immobiliser system determined by certification ECU/ Set or Unset	Unset: Engine immobiliser unset (engine switch on [ACC] or on [IG]) Set: Engine immobiliser set (engine switch off)	When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU is part of the problem. The engine cannot be started when this item displays "Set". HINT:  The state of the immobiliser (whether it is set or unset) can be determined through the certification ECU. If this item displays "Set", the certification ECU can be determined to be normal. The security indicator light operation is only linked with the state of the immobiliser (set/unset), and is not related to the steering lock operation (lock/unlock), when the immobiliser is set, the security indicator light blinks.

   OK

   The Data List item changes to "unset" when the engine switch is turned on (ACC) or on (IG).

NG → See step   27 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter Request Signal	Condition of engine start command signal/ON or OFF	ON: Engine switch pressed and held while carrying key with shift lever in P and brake pedal depressed OFF: Engine switch released after approximately 1 second elapses	This item displays "ON" when cranking the engine. The engine cannot be started when this item is "OFF".

   OK

   The display changes in response to the operation of the engine switch.

   NOTE:

   Make sure that the engine switch indicator is illuminated in green before pressing the engine switch.

NG → See step   38 

OK → END 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key or Starting Control / Data List.
5. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Shift P Signal	Shift position (P)/ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	Use this item to determine if the shift position switch is malfunctioning. The engine cannot be started when this item is "OFF".
   Neutral SW/ Clutch SW	Shift position (P, N) /ON or OFF	ON: Shift lever in P or N OFF: Shift lever not in P or N	Use this item to help determine if the park/neutral position switch is malfunctioning. The engine cannot be started when this item is "OFF".

   STARTING CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Shift Position P or N	Condition of park/neutral position switch/ON or OFF	ON: Shift lever in P or N OFF: Shift lever not in P or N	When there is a malfunction, the engine cannot be cranked.

   OK

   The item in the Data List changes according to the shift position.

NG → See step   18 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Stop Light Switch1	Stop light switch 1/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   OK

   The item in the Data List changes when the brake pedal is depressed and released.

NG → See step   20 

OK → See step   39 

1. Disconnect the B3 park/neutral position switch connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking B42 Park/Neutral Position Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (B) - 5 (L)	Shift lever in P or N	Below 1 Ω
   	Shift lever not in P or N	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Park/Neutral Position Switch)

NG → See step   40 

OK: Go to next step 

1. Disconnect the A35 power management control ECU connector.
2. Disconnect the B3 park/neutral position switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A35-3 (STAR) - B3-4 (B)	Always	Below 1 Ω
   A35-3 (STAR) - Body ground	Always	10 kΩ or higher

4. Reconnect the park/neutral position switch connector.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A35-3 (STAR) - Body ground	Engine switch pressed and held with brake pedal depressed (starter on) → Engine switch released after approximately 1 second elapses (starter off)	6 V or more* → 1.8 V or less

   HINT: 

   *: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   41 

1. Disconnect the A2 stop light switch connector.
2. Inspect the stop light switch assembly. Refer to INSPECTION .

NG → See step   42 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   43 

1. Replace the certification ECU with a new one. Refer to REMOVAL .
2. Perform the registration procedures. Refer to REGISTRATION .
3. Use the Data List to check if S code certification is functioning properly again.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU/NG or OK	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started).

NEXT → END 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. According to the display on the Techstream, read the Data List.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Unlock Switch	State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF	ON: Steering lock unlocked OFF: Steering lock locked	When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering lock is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering lock unlocks. The engine cannot be started when the steering unlock signal is off.

   OK

   The item in the Data List indicates "OFF" (the steering lock is locked).

NG → See step   24 

OK → See step   44 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key / Data List.
5. According to the display on the Techstream, read the Data List.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between certification ECU and steering lock actuator assembly/NG or OK	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or steering lock actuator assembly is not registered or the certification ECU or steering lock actuator is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started).

   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 → See step   26 

OK: Go to next step 

NEXT → END 

1. Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to REGISTRATION .
2. Perform the registration procedures. Refer to DISASSEMBLY .
3. Use the Data List to check if L code certification is functioning properly again.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between certification ECU and steering lock actuator assembly/NG or OK	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU or steering lock actuator assembly is not registered or the certification ECU or steering lock actuator is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started).

   OK

   OK (L code certification result normal) appears on the screen.

NG → See step   27 

OK → END 

1. Replace the certification ECU with a new one. Refer to REGISTRATION .
2. Perform the registration procedures. Refer to REMOVAL .
3. Use the Data List to check if S code certification is functioning properly again.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU/NG or OK	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU is not registered or the certification ECU is malfunctioning. The steering lock cannot be locked. The steering lock cannot be unlocked (the engine cannot be started).

NEXT → END