Engine does not Start: Procedure

CHECK ENTRY FUNCTION DETECTION AREA
1. Inspect entry detection area.
  
  Fig 1: Identifying Inspection Points Of Electrical Key
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. When the electrical key is in either of the 2 inspection points in the illustration, the shift lever is in the P position and the brake pedal is depressed, check that the engine switch indicator illuminates in green.
    OK
    
    Engine switch illuminates in green.
    
    HINT:
    
    If the engine switch does not illuminate, perform troubleshooting according to the PROBLEM SYMPTOMS TABLE of the smart access with push-button start (starting) (engine switch indicator light does not come on). Refer to PROBLEM SYMPTOMS TABLE and the smart access with push-button start (entry door lock) (matching for the inside of the cabin cannot be performed). Refer to PROBLEM SYMPTOMS TABLE .
NG → GO TO OTHER PROBLEM

OK: Go to next step
CHECK IF ENGINE STARTS (INITIALIZE STEERING LOCK)
1. Engine switch off.
2. Make sure that the shift lever is in the P position.
3. Open and close the driver's door.
4. When the shift lever is in the P position and the brake pedal is depressed, check if the engine can be started.
  OK
  
  Steering lock/unlock function operates normally and 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. Refer to INITIALIZATION .
OK → END

NG: Go to next step
CHECK FOR DTC
1. Delete the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs again.
  OK
  
  No DTC is output.
  
  HINT:
  - If smart access system with push-button start (starting function) DTCs are output. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  - If smart access system with push-button start (entry lock function) DTCs are output. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  - If electrical steering lock DTCs are output. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  - If engine immobilizer system DTCs are output. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  - If engine control system DTCs output (2GR-FE). Refer to DIAGNOSTIC TROUBLE CODE CHART .
NG → GO TO DIAGNOSTIC TROUBLE CODE CHART DTC CHART

OK: Go to next step
CHECK ENGINE SWITCH CONDITION
1. Check the power source mode change.
  1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:
    OK
    
    off → on (ACC) → on (IG) → off
    
    HINT:
    - If power mode does not change to ON (IG and ACC). Refer to Power Source Mode does not Change to ON (IG and ACC) .
    - If power mode does not change to ON (IG). Refer to Power Source Mode does not Change to ON (IG) .
    - If power mode does not change to ON (ACC). Refer to Power Source Mode does not Change to ON (ACC) .
NG → GO TO OTHER PROBLEM

OK: Go to next step
CHECK CRANKING FUNCTION
1. Check the engine cranking function.
  1. When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.
    OK
    
    Engine cranks.
OK → See step 23

NG: Go to next step

READ VALUE USING TECHSTREAM (P SIGNAL)

Connect Techstream to the DLC3.
Turn the engine switch on (IG).

Read the DATA LIST according to the displays on the tester screen.

MAIN BODY:

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Shift P Signal	Shift P signal / ON or OFF	ON: Shift position is P OFF: Shift position is not P	-

ON (P signal is ON) and OFF (P signal is OFF) appear on the screen.

HINT:

If the result is not as specified, perform troubleshooting for DTC B2281 ("P" signal malfunction) first. Refer to DTC B2281: "P" Signal Malfunction .

NG → GO TO DTC B2281: "P" Signal Malfunction .DTC B2281

OK: Go to next step

READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)

Connect Techstream to the DLC3.
Turn the engine switch on (IG).

Check the DATA LIST for proper functioning of the stop light switch.

MAIN BODY:

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

ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen.

HINT:

If the result is not as specified, perform troubleshooting for DTC B2284 (Brake signal malfunction) first. Refer to DTC B2284: Brake Signal Malfunction .

NG → GO TO DTC B2284: Brake Signal Malfunction .DTC B2284

OK: Go to next step

READ VALUE USING TECHSTREAM (STEERING LOCK)

Connect Techstream to the DLC3.

Turn the engine switch on (IG).

MAIN BODY:

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Steering Unlock Switch	Steering lock condition / ON or OFF	ON: Steering is unlocked (Engine switch on (ACC)) OFF: Steering is locked (Engine switch off)	-

ON (steering is unlocked) and OFF (steering is locked) appear on the screen.

HINT:

If the result is not as specified, perform troubleshooting for DTCs B2285 (Steering lock position signal circuit malfunction) and B2288 (Steering lock signal circuit malfunction) first. Refer to DIAGNOSTIC TROUBLE CODE CHART .

NG → GO TO DTC B2285: Steering Lock Position Signal Circuit Malfunction DTC B2285

OK: Go to next step

CHECK STEERING LOCK
1. Check if the steering lock is released when turning the engine switch on (ACC).
  OK
  
  The steering lock is released.
NG → See step 22

OK: Go to next step

INSPECT MAIN BODY ECU (STSW VOLTAGE)

Disconnect the A10 ECM connector.

Fig 2: Identifying E58 Main Body ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

Tester Connection (Symbols)	Condition	Specified Condition
E58-4 (STSW) - Body ground	Brake pedal depressed, engine switch held on (ST)	Output voltage at terminal AM1 or AM2 is -2 V or more.

HINT:

If the result is not as specified, perform troubleshooting for DTC B2275 (STSW monitor malfunction) first. Refer to DTC B2275: STSW Monitor Malfunction .

NG → GO TO DTC B2275: STSW Monitor Malfunction DTC B2275

OK: Go to next step

INSPECT ECM (ACCR VOLTAGE)

Reconnect the connector.

Fig 3: Identifying E60 Main Body ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

Tester Connection (Symbols)	Condition	Specified Condition
E60-3 (ACCR) - Body ground	Brake pedal depressed, shift lever P position, engine switch is pushed once → on (IG)	0.1 to 0.8 V*¹ → Output voltage at terminal AM1 or AM2 is -2 V or more.

*¹ : Voltage is output only when the engine is cranking.

HINT:

If the result is not as specified, perform troubleshooting for DTC B2276 (ACCR signal circuit malfunction) first. Refer to DTC B2276: ACCR Signal Circuit Malfunction .

NG → GO TO DTC B2276: ACCR Signal Circuit Malfunction DTC B2276

OK: Go to next step

INSPECT MAIN BODY ECU (STR VOLTAGE)

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

Fig 4: Identifying E61 Main Body ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

Tester Connection (Symbols)	Condition	Specified Condition
E61-8 (STR) - Body ground	Shift lever P or N position → except P or N position	Below 1 V → Pulse generation

OK → See step 18

NG: Go to next step

INSPECT RELAY (ST CUT)

Measure the resistance of the ST CUT relay.

Fig 5: Identifying ST CUT Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2

NG → REPLACE RELAY

OK: Go to next step

INSPECT PARK/NEUTRAL POSITION SWITCH

Disconnect the park/neutral position (PNP) switch connector.

Fig 6: Identifying Park/Neutral Position Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Shift Position	Tester Connection	Specified Condition
P	4 - 9	Below 1 Ω
N	4 - 9	Below 1 Ω
Except P and N	4 - 9	10 kΩ or higher

NG → REPLACE PARK / NEUTRAL POSITION SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM, MAIN BODY ECU)

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

Fig 7: Identifying Main Body ECU And Park/Neutral Position Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection (Symbols)	Condition	Specified Condition
B12-62 (NSW) - B36-4	Always	Below 1 Ω
B12-62 (NSW) - E61-8 (STR)	Always	Below 1 Ω
B12-62 (NSW) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT DRIVER SIDE JUNCTION BLOCK (STR2 VOLTAGE)

Disconnect the B12 ECM connector.

Fig 8: Identifying E58 Main Body ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

Tester Connection (Symbols)	Condition	Specified Condition
E58-6 (STR2) - Body ground	Brake pedal depressed, shift lever P or N position, engine switch on (ST)	Output voltage at terminal AM1 or AM2 is -3.5 V or more.*¹

*¹ : Voltage is output for 0.3 seconds when the engine is cracking to start. Disconnect the B12 connector from the ECM before measuring the voltage.

NG → REPLACE MAIN BODY ECU

OK: Go to next step

CHECK WIRE HARNESS (MAIN BODY ECU - ECM - ENGINE ROOM R/B)

Remove the ST CUT relay from the engine room R/B.

Fig 9: Identifying Main Body ECU And ST CUT Relay Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E58 ECU connector.

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

Standard resistance

Tester Connection (Symbols)	Condition	Specified Condition
B12-63 (STAR) - E58-6 (STR2)	Always	Below 1 Ω
B12-63 (STAR) - ST CUT relay terminal - 3	Always	Below 1 Ω
B12-63 (STAR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT RELAY (ST)

Remove the starter relay from the engine room R/B.

Fig 10: Identifying ST CUT Relay Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the starter relay.

Standard resistance

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

NG → REPLACE RELAY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ECM - ST RELAY, PNP SWITCH)

Disconnect the A10 ECM connector.

Fig 11: Disconnecting A10 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Tester Connection (Symbols)	Condition	Specified Condition
A10-48 (STA) - ST relay terminal - 1	Always	Below 1 Ω
A10-48 (STA) - B36-9	Always	Below 1 Ω
A10-48 (STA) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT ENGINE ROOM RELAY BLOCK (ST RELAY VOLTAGE)

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

Fig 12: Inspecting Engine Room Relay Block (ST Relay Voltage)

Standard voltage

Tester Connection	Condition	Specified Condition
ST relay terminal - 5 - Body ground	Always	9 to 14 V
ST relay terminal - 2 - Body ground	Always	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT STARTER ASSEMBLY
HINT:

Refer to INSPECTION .

NG → REPAIR OR REPLACE STARTER ASSEMBLY

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - BATTERY, ST RELAY)

READ VALUE USING TECHSTREAM (L CODE)

Reconnect the connectors.
Connect Techstream to the DLC3.
HINT:

When using 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 tester and vehicle starts.

Turn the engine switch on (IG).

SMART KEY:

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
L Code Check	L code check / ON or NG	OK: Normal NG: Malfunction	Electrical key in the cabin

OK is displayed on the screen.

HINT:

If the result is not as specified, refer to PROBLEM SYMPTOMS TABLE of the electrical steering lock (steering wheel cannot be unlocked). Refer to PROBLEM SYMPTOMS TABLE .

If the result is not as specified, there may be a malfunction with the steering lock ECU or the ID code box.

NG → GO TO STEERING LOCK SYSTEM STEERING LOCK SYSTEM

OK: Go to next step

READ VALUE USING TECHSTREAM (ENGINE START REQUEST)

Connect Techstream to the DLC3.
HINT:

When using 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 tester and vehicle starts.

Turn the engine switch on (IG).

SMART KEY:

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Engine Start Request	Start request signal response / OK or NG	OK: Received NG: Not received	-

OK (received) and NG (not received) appear on the screen.

NG → REPLACE CERTIFICATION ECU

OK: Go to next step

READ VALUE USING TECHSTREAM (S CODE)

Connect Techstream to the DLC3.
HINT:

When using 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 tester and vehicle starts.

Turn the engine switch on (IG).

SMART KEY:

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
S Code Check	S code check / OK or NG	OK: Normal NG: Malfunction	-

OK is displayed on the screen.

HINT:

If the result is not as specified, there may be a malfunction with the certification ECU or the ID code box.

NG → See step 26

OK: Go to next step

INSPECT ID CODE BOX

Check the input signal waveform.

Fig 13: Signal Waveform Graph

Connect an oscilloscope to terminal E32-6 (EFIO) and body ground.
Turn the engine switch on (IG).

Check the signal waveform according to the condition(s) in the table below.

Item	Condition
Tool setting	10 V/DIV., 100 ms./DIV.
Vehicle condition	Engine switch on (IG)

NG → REPLACE ID CODE BOX

OK → END

REPLACE CERTIFICATION ECU
1. Replace the certification ECU.
2. Perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION .
3. Check if the engine can be started.
  OK
  
  Engine can be started.
OK → END (CERTIFICATION ECU IS DEFECTIVE)

NG → REPLACE ID CODE BOX