Drive Start Control [10/2024 - ]: Procedure

1. Check if the customer operated the vehicle in a way that would cause the drive start control to operate.

   Activation conditions

   • Pattern A (When all of the following conditions are met, control starts.)
     • The accelerator pedal is open by approximately 1/5 or more.
     • The shift lever is moved from P to any forward position D (Including other forward shift positions) or R.
   • Pattern B (When all of the following conditions are met, control starts.)
     • The accelerator pedal is open by approximately 1/5 or more.
     • The shift lever is moved from R to any forward position D (Including other forward shift positions), any forward position D (Including other forward shift positions) to R, or N to R.

   HINT: 

   Depending on the situation, the shift position may not be changed.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Items Controlled

   • Engine output is restricted.

   Deactivation Conditions

   • The accelerator pedal is released.
   • The shift lever is in P or N.

   HINT: 

   • The engine output restricted level differs between pattern A and pattern B.
   • During sudden start restraint control, engine output is adjusted based on the road gradient.
   • Drive start control is not activated when TRC is turned off.

     Control will also not operate under the following conditions. (if equipped)

     • When in auto LSD mode
     • When the transfer switch is operated to switch the status to L4
     • When the center differential is locked
     • When TRAIL mode is on
     • When multi-terrain select is selected

   Result

   Result	Proceed to
   Not performed	A
   Performed	B

Result: 

B 

SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

A 

See step  2

1. Perform the Health Check using the GTS.
2. Check the DTCs.

   Result

   Result	Proceed to
   DTCs are not output (Hunting)	A
   DTCs are not output (Hesitation/poor acceleration)	B
   DTCs are output	C

Result: 

B 

See step  5

Result: 

C 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

A 

See step  3

1. Start the engine.
2. Read the value displayed on the GTS.

   Chassis > Brake/EPB > Data List 

   Tester Display
   FR Wheel Speed
   FL Wheel Speed
   RR Wheel Speed
   RL Wheel Speed

   Standard

   Condition	Specified Condition
   Vehicle stopped, engine running	0 km/h (0 mph)
   Vehicle being driven at constant speed between 16.1 to 64.4 km/h (10 to 40 mph)	No large fluctuations when driving at a constant speed

   WARNING:

   When performing a drive test, obey all speed limits and traffic laws.

   HINT: 

   Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSPECT FRONT OR REAR SPEED SENSOR 

Result: 

OK 

See step  4

1. Start the engine.
2. Read the value displayed on the GTS.

   Chassis > Brake/EPB > Data List 

   Tester Display
   Lateral G
   Forward and Rearward G

   Standard

   Condition	Specified Condition
   During deceleration	Changes continuously
   During acceleration	Changes continuously

   WARNING:

   When performing a drive test, obey all speed limits and traffic laws.

   HINT: 

   Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

NG 

INSPECT AIRBAG ECU ASSEMBLY. Refer to  TERMINALS OF ECU [10/2022 - ] 

1. Read the value displayed on the GTS.

   Powertrain > Transmission > Data List 

   Tester Display
   Shift Position (Current Position)

   OK

   Condition	Specified Condition
   Select shift state	Matches currently selected shift state

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO ELECTRONIC SHIFT LEVER SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

OK 

See step  6

1. Turn the ignition switch to ON.
2. Read the value displayed on the GTS.

   Powertrain > Engine > Data List 

   Tester Display
   Accelerator Position Sensor No. 1 Voltage %
   Accelerator Position Sensor No. 2 Voltage %

   Standard

   Condition	Specified Condition
   Accelerator Pedal Released → Depressed	Changes continuously

   Result

   Proceed to
   OK
   NG

Result: 

OK 

SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ] 

Result: 

NG 

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ]