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 (SERVICE INFORMATION) 

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
   Power Supply Open	Record of malfunction of signal sent to steering lock actuator assembly (motor) from power source control ECU (open circuit) (DTC B2782 stored)/OK or NG(Past)	OK: No record of malfunction (open circuit) NG(Past): Record of malfunction (open circuit) exists	This item records malfunctions in the circuit between the power source control ECU and steering lock actuator assembly (motor).

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

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

B → GO TO  DIAGNOSTIC TROUBLE CODE CHART 

C → See step   35 

A: Go to next step 

1. When the electrical key transmitter is inside the vehicle and the shift lever is in P (for Automatic Transaxle), push the engine switch with the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) 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   39 

C → See step   40 

D → See step   41 

A: Go to next step 

1. Get into the vehicle while carrying the electrical key transmitter.
2. Move the shift lever to P (for Automatic Transaxle).
3. Depress the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle).
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 no initial combustion	B
   Engine cranks, but is difficult to start	C

B → See step   34 

C → See step   50 

A: Go to next step 

1. Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while not depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) 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 immobilizer function can be presumed to be normal.

NG → See step   12 

OK: Go to next step 

1. Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) 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 (for Automatic Transaxle) or clutch signal (for Manual Transaxle) can be considered to be normal.

   RESULT
   
   

   Result		Proceed to
   OK		A
   NG	for Automatic Transaxle	B
   	for Manual Transaxle	C

B → See step   17 

C → See step   23 

A: 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 electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) and confirm that the Data List item changes.
   STARTING CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Starter SW	Starter activation request/ON or OFF	ON: Starter activation requested OFF: Starter activation not requested	When there is a malfunction, the engine cannot be cranked.

   OK

   The Data List item changes.

NG → See step   38 

OK: Go to next step 

1. Remove the ST relay from the No. 3 relay block.
   Fig 1: Inspecting ST 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
   1 - 2	20°C (68°F)	93.8 to 136.4 Ω
   3 - 5	Battery voltage not applied to terminals 1 and 2	10 kΩ or higher
   	Battery voltage applied to terminals 1 and 2	Below 1 Ω

3. Reinstall the ST relay to the No. 3 relay block.

NG → REPLACE ST RELAY 

OK: Go to next step 

1. Disconnect the C42 power source control ECU connector.
   Fig 2: Checking Power Source Control ECU - Body Ground

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C42-3 (STAR) - Body ground	20°C (68°F)	93.8 to 136.4 Ω
   C42-2 (STA) - Body ground

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Source 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   42 

OK: Go to next step 

1. Remove the starter assembly from the vehicle to perform an inspection.
2. Remove the ST relay from the No. 3 relay block.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   B4-1 - 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 - B9-1	Always	Below 1 Ω
   3 or B9-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   43 

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 (smart key ECU assembly) and ID code box (immobilizer code ECU)/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

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

NG → See step   26 

OK: Go to next step 

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

   OK

   The steering unlocks.

NG → See step   28 

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
   Immobilizer	State of immobilizer system determined by certification ECU (smart key ECU assembly)/ Set or Unset	Unset: Engine immobilizer unset (engine switch on [ACC] or on [IG]) Set: Engine immobilizer set (engine switch off)	When the immobilizer cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is part of the problem. The engine cannot be started when this item displays "Set". HINT:  The state of the immobilizer (whether it is set or unset) can be determined through the certification ECU (smart key ECU assembly). If this item displays "Set", the communication between the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) can be determined to be normal. The security indicator light operation is only linked with the state of the immobilizer (set/unset), and is not related to the steering lock operation (lock/unlock). When the immobilizer 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   32 

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 electrical key transmitter with shift lever in P (for Automatic Transaxle) and brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) 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   44 

OK: Go to next step 

1. Replace the ID code box (immobilizer code ECU) with a new one. Refer to REMOVAL .
2. Perform the registration procedures. Refer to REGISTRATION .
3. Get into the vehicle while carrying the electrical key transmitter, move the shift lever to P (for Automatic Transaxle), press the engine switch while not depressing the brake pedal (for Automatic Transaxle) or clutch pedal (for Manual Transaxle) 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 

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 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.
   Neutral SW/ Clutch SW	Shift position (P, N) (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF	ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle)	Use this item to help determine if the park/neutral position switch (for Automatic Transaxle) or clutch switch (for Manual Transaxle) 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 (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF	ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle)	When there is a malfunction, the engine cannot be cranked.

   OK

   The items in the Data List change according to the shift position.

NG → See step   19 

OK: Go to next step 

NG → See step   21 

OK → See step   45 

1. Disconnect the B14 park/neutral position switch connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Inspecting Park/Neutral Position Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (B) - 9 (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   46 

OK: Go to next step 

1. Disconnect the C42 power source control ECU connector.
2. Disconnect the B14 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
   C42-3 (STAR) - B14-4 (B)	Always	Below 1 Ω
   C42-3 (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
   C42-3 (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 higher* → 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   47 

1. Disconnect the A1 stop light switch connector.
2. Inspect the stop light switch assembly. Refer to INSPECTION .

NG → See step   37 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   48 

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
   Neutral SW/ Clutch SW	Shift position (P, N) (for Automatic Transaxle) or state of clutch pedal (for Manual Transaxle)/ON or OFF	ON: Shift lever in P or N (for Automatic Transaxle) or clutch pedal depressed (for Manual Transaxle) OFF: Shift lever not in P or N (for Automatic Transaxle) or clutch pedal released (for Manual Transaxle)	Use this item to help determine if the park/neutral position switch (for Automatic Transaxle) or clutch switch (for Manual Transaxle) is malfunctioning. The engine cannot be started when this item is "OFF".

   OK

   ON (clutch pedal depressed) and OFF (clutch pedal released) appear on the screen according to the condition of the clutch pedal.

NG → See step   24 

OK → See step   48 

1. Disconnect the A4 clutch start switch connector.
   Fig 4: Inspecting Clutch Start Switch

   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
   1 - 2	Pushed in (Clutch pedal depressed)	Below 1 Ω
   	Released (Clutch pedal released)	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Clutch Pedal Switch Assembly)

NG → REPLACE CLUTCH START SWITCH 

OK: Go to next step 

1. Disconnect the C42 power source control ECU connector.
2. Disconnect the A4 clutch start switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C42-3 (STAR) - A4-2	Always	Below 1 Ω
   C42-3 (STAR) - Body ground	Always	10 kΩ or higher

4. Reconnect the clutch start switch connector.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   C42-3 (STAR) - Body ground	Engine switch pressed and held with clutch start switch depressed (starter on) → Engine switch released after approximately 1 second elapses (starter off)	6 V or higher* → 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   48 

1. Replace the certification ECU (smart key ECU assembly) 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 (smart key ECU assembly) and ID code box (immobilizer code ECU)/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

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

NG → See step   27 

OK → END 

1. Replace the ID code box (immobilizer code 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 (smart key ECU assembly) and ID code box (immobilizer code ECU)/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering 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 unlocked OFF: Steering locked	When the shift lever is in P (for Automatic Transaxle) and the engine switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock signal is off.

   OK

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

NG → See step   29 

OK → See step   36 

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 ID code box (immobilizer code ECU) and steering lock actuator assembly/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box (immobilizer code ECU) or steering lock actuator assembly is not registered or the ID code box (immobilizer code ECU) or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

   The Data List item changes to "OK" when the electrical key transmitter is inside the vehicle.

   HINT: 

   Reasons for verification failure:

   • The steering lock ECU or ID code box (immobilizer code 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   31 

OK: Go to next step 

1. Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to DISASSEMBLY .
2. Perform the registration procedures. Refer to REGISTRATION .
3. Turn the engine switch on (IG).
4. Operate the steering wheel and check the steering condition.

NEXT → END 

1. Replace the steering lock actuator assembly (steering lock ECU) with a new one. Refer to DISASSEMBLY .
2. Perform the registration procedures. Refer to REGISTRATION .
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 ID code box (immobilizer code ECU) and steering lock actuator assembly/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box (immobilizer code ECU) or steering lock actuator assembly is not registered or the ID code box (immobilizer code ECU) or steering lock actuator is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

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

NG → See step   49 

OK → END 

1. Replace the certification ECU (smart key ECU assembly) 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 (smart key ECU assembly) and ID code box (immobilizer code ECU)/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK

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

NG → See step   33 

OK → END 

1. Replace the ID code box (immobilizer code 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 (smart key ECU assembly) and ID code box (immobilizer code ECU)/OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

NEXT → END