Entry And Start System (For Start Function) Engine Does Not Start

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ENGINE SWITCH (SWITCH CONDITION)

CHECK WHETHER DTC OUTPUT RECURS

CHECK CRANKING FUNCTION

READ VALUE USING INTELLIGENT TESTER (L CODE)

READ VALUE USING INTELLIGENT TESTER (ENGINE START CONDITION)

READ VALUE USING INTELLIGENT TESTER (S CODE)

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

READ VALUE USING INTELLIGENT TESTER (PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH)

READ VALUE USING INTELLIGENT TESTER (SHIFT LOCK CONTROL ECU)

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

CHECK STEERING LOCK

CHECK MAIN BODY ECU

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU AND BODY GROUND)

INSPECT SHIFT LOCK CONTROL ECU

INSPECT STARTER RELAY (ST)

INSPECT PARK/NEUTRAL POSITION SWITCH

INSPECT CLUTCH START SWITCH

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH - STARTER RELAY AND BODY GROUND)

INSPECT FUSE (STOP)

INSPECT STOP LIGHT SWITCH

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STOP LIGHT SWITCH AND BODY GROUND)

REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

DESCRIPTION

1. When the engine switch is pressed with the brake pedal depressed and the shift lever in P (for A/T) or the clutch pedal depressed (for M/T), the main body ECU determines that it is an engine start request.
   

2. The certification ECU (smart key ECU assembly) and other ECUs perform key verification via the LIN communication line. The engine switch indicator light illuminates in green.
   

3. The main body ECU activates the IG1 No. 3 relay, ACC relay and integration relay (IG2 relay).
   

4. The certification ECU (smart key ECU assembly) outputs a steering unlock signal. The signal is sent to the steering lock ECU via the LIN communication line.
   

5. The main body ECU sends an engine start request signal to the ECM.
   

6. The main body ECU deactivates the ACC relay until the ECU detects an engine start.
   

7. The ECU reactivates the ACC relay and turns off the engine switch indicator light.
   
   

   Symbols of Main Body ECU	Signals
   SSW1/SSW2	Engine switch on (ACC, IG) signal
   IG1D	IG1 No. 3 relay operation signal
   ACCD	ACC relay operation signal
   IG2D	Integration relay (IG2 relay) operation signal
   STP	Stop light switch signal
   P (for A/T)	Shift lock signal
   TACH	Engine start detection signal
   STSW	Starter activation request signal
   ACCR	ACC cut request signal

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Check the power source mode change.
   

   1. When the key is inside the vehicle and the shift lever is in P (for A/T), check that pressing the engine switch causes the power source mode to change as follows:
      

      OK:

      off → on (ACC) → on (IG) → off
      

1. Clear the DTCs (Click here).
   

2. Check whether the trouble recurs 5 seconds after the engine switch is turned on (IG).
   

3. Check whether DTCs for the main body ECU or certification ECU (smart key ECU assembly) are output.
   

   Result

   Result	Proceed to
   No DTC output	A
   Main body ECU Entry and start system (for start function)	B
   Certification ECU (Smart key ECU assembly) Steering lock system	C
   Certification ECU (Smart key ECU assembly) Engine immobiliser system	D

1. Check the engine cranking function.
   

   1. for A/T:
      When there is fuel in the fuel tank, the key is inside the vehicle and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch cranks the engine.
      for M/T:
      When there is fuel in the fuel tank and the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch cranks the engine.
      

      OK:

      Engine cranks.
      

1. Use the Data List to check if L code certification is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	L code certification result/NG or OK	OK: L code certification result is normal NG: L code certification result is abnormal	-

   OK:

   OK is displayed on the intelligent tester.
   

1. Use the Data List to check if the engine start is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Start Condition	Engine start condition by certification ECU (smart key ECU assembly)/OK or NG	OK: Engine start is permitted NG: Engine start is prohibited	-

   OK:

   OK is displayed on the intelligent tester.
   

1. Use the Data List to check if S code certification is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	S code certification result/NG or OK	OK: S code certification result is normal NG: S code certification result is abnormal	-

   OK:

   OK is displayed on the intelligent tester.
   

1. Replace the ID code box (immobiliser code ECU).
   

2. Register the recognition code (ECU code).
   

3. Check that the engine starts.
   

   Result

   Result	Proceed to
   Engine starts	A
   Engine does not start (for 1GR-FE)	B
   Engine does not start (for 1UR-FE)	C
   Engine does not start (for 3UR-FE)	D
   Engine does not start (for 1VD-FTV)	E

1. Use the Data List to check if the park/neutral position switch (for A/T) or clutch start switch (for M/T) is functioning properly.
   
   

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Neutral SW/ Clutch SW	Park/neutral position switch (A/T), clutch start switch (M/T)/ON or OFF	ON: Shift lever in P or N (A/T), clutch pedal depressed (M/T) OFF: Shift lever not in P or N (A/T), clutch pedal released (M/T)	-

   Result

   Result	Proceed to
   for A/T: ON (shift lever in P or N) and OFF (shift lever not in P or N) displayed on the intelligent tester.	A
   for M/T: ON (clutch pedal depressed) and OFF (clutch pedal released) displayed on the intelligent tester.	B
   for A/T: ON (shift lever in P or N) and OFF (shift lever not in P or N) not displayed on the intelligent tester. for M/T: ON (clutch pedal depressed) and OFF (clutch pedal released) not displayed on the intelligent tester.	C

1. Use the Data List to check if the shift position signal is functioning properly.
   
   

   Main Body

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

   OK:

   ON (shift lever in P) and OFF (shift lever not in P) are displayed on the intelligent tester.
   

1. Use the Data List to check if the stop light switch is functioning properly.
   
   

   Main Body

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

   OK:

   ON (brake pedal is depressed) and OFF (brake pedal is released) are displayed on the intelligent tester.
   

1. Check if the steering lock is released when turning the engine switch on (ACC).
   

   OK:

   The steering lock is released.
   

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

   HINT:

   The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks.

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E4-4 (STSW) - Body ground	for A/T: Brake pedal depressed, engine switch depressed for M/T: Clutch pedal depressed, engine switch depressed	11 to 14 V

   Result

   Result	Proceed to
   Outside specified range	A
   Within specified range (for 1GR-FE)	B
   Within specified range (for 1UR-FE)	C
   Within specified range (for 3UR-FE)	D
   Within specified range (for 1VD-FTV)	E

1. Disconnect the E4 main body ECU connector.
   

2. Disconnect the E51 shift lock control ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E4-2 (P) - E51-11 (P2)	Always	Below 1 Ω
   E51-3 (E) - Body ground	Always	Below 1 Ω
   E4-2 (P) or E51-11 (P2) - Body ground	Always	10 kΩ or higher

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

   Reference

   Terminal No. (Symbol)	Tool Setting	Condition
   E51-11 (P2) - E51-3 (E)	2 V/DIV., 20 msec./DIV.	Shift lever in P

   OK:

   The waveform is similar to that shown in the illustration.
   

   Result

   Result		Proceed to
   OK		A
   NG	for 1GR-FE	B
   	for 1VD-FTV, 3UR-FE, 1UR-FE	C

1. expect GRJ200L-GNANKC, URJ202L-GNTEKC:
   

   1. Remove the ST relay from the engine room relay block.
      

   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 to terminals 1 and 2	10 kΩ or higher
      3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω

2. for GRJ200L-GNANKC, URJ202L-GNTEKC:
   

   1. Remove the ST relay from the engine room relay block.
      

   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 to terminals 1 and 2	10 kΩ or higher
      3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω

      Result

      Result	Proceed to
      Within specified range (for A/T)	A
      Within specified range (for M/T)	B
      Outside specified range	C

1. Disconnect the C24 park/neutral position switch connector.
   

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

   Standard Resistance:

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

   Result

   Result	Proceed to
   Outside specified range (for A750F)	A
   Outside specified range (for AB60F)	B
   Within specified range	C

1. Disconnect the A49 (for LHD) or e1 (for RHD) clutch start switch connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1 - 2	Clutch start switch pin pushed	Below 1 Ω
   1 - 2	Clutch start switch pin not pushed	10 kΩ or higher

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

   Standard Resistance (for A/T):

   Tester Connection	Condition	Specified Condition
   E1-8 (STR) - C24-4 (B)	Always	Below 1 Ω
   E1-8 (STR) or C24-4 (B) - Body ground	Always	10 kΩ or higher

   Standard Resistance (for M/T):

   Tester Connection	Condition	Specified Condition
   for LHD: E1-8 (STR) - A49-1	Always	Below 1 Ω
   for LHD: E1-8 (STR) or A49-1 - Body ground	Always	10 kΩ or higher
   for RHD: E1-8 (STR) - e1-1	Always	Below 1 Ω
   for RHD: E1-8 (STR) or e1-1 - Body ground	Always	10 kΩ or higher

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

   Standard Resistance (for A/T):

   Tester Connection	Condition	Specified Condition
   C24-5 (L) - Relay block ST relay terminal 1*1 C24-5 (L) - Relay block ST relay terminal 2*2	Always	Below 1 Ω
   C24-5 (L) or Relay block ST relay terminal 1 - Body ground*1 C24-5 (L) or Relay block ST relay terminal 2 - Body ground*2	Always	10 kΩ or higher
   Relay block ST relay terminal 2 - Body ground*1 Relay block ST relay terminal 1- Body ground*2	Always	Below 1 Ω

   HINT:

   1. *1: for GRJ200L-GNANKC, URJ202L-GNTEKC
      
   2. *2: except GRJ200L-GNANKC, URJ202L-GNTEKC
      

   Standard Resistance (for M/T):

   Tester Connection	Condition	Specified Condition
   for LHD: A49-2 - Relay block ST relay terminal 1*1 A49-2 - Relay block ST relay terminal 2*2	Always	Below 1 Ω
   for LHD: A49-2 or Relay block ST relay terminal 1 - Body ground*1 A49-2 or Relay block ST relay terminal 2 - Body ground*2	Always	10 kΩ or higher
   for RHD: e1-2 - Relay block ST relay terminal 1*1 e1-2 - Relay block ST relay terminal 2*2	Always	Below 1 Ω
   for RHD: e1-2 or Relay block ST relay terminal 1 - Body ground*1 e1-2 or Relay block ST relay terminal 2 - Body ground*2	Always	10 kΩ or higher
   Relay block ST relay terminal 2 - Body ground*1 Relay block ST relay terminal 1 - Body ground*2	Always	Below 1 Ω

   HINT:

   1. *1: for GRJ200L-GNANKC, URJ202L-GNTEKC
      
   2. *2: except GRJ200L-GNANKC, URJ202L-GNTEKC
      

1. Remove the STOP fuse from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   STOP fuse	Always	Below 1 Ω

1. Disconnect the A30 stop light switch connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Stop light switch pin not pushed	Below 1 Ω
   3 - 4	Stop light switch pin pushed	Below 1 Ω
   1 - 2	Stop light switch pin pushed	10 kΩ or higher
   3 - 4	Stop light switch pin not pushed	10 kΩ or higher

1. Disconnect the 2B main body ECU connector.
   

2. Disconnect the A30 stop light switch connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   A30-2 - Body ground	Always	11 to 14 V

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   2B-22 (STP) - A30-1	Always	Below 1 Ω
   2B-22 (STP) or A30-1 - Body ground	Always	10 kΩ or higher

1. Replace the steering lock actuator assembly (steering lock ECU).
   

   HINT:

   1. For Power tilt and telescopic, use the following procedures Click here
      
   2. For Manual tilt and telescopic, use the following procedures Click here
      

2. Register the recognition code (ECU code).
   

3. Check that the engine starts.
   

   OK:

   Engine starts.
   

1. Replace the certification ECU (smart key ECU assembly).
   

2. Register the recognition code (ECU code).
   

3. Check that the engine starts.
   

   OK:

   Engine starts.