Inspection Mode Procedure

HINT:

• The LEXUS GS450h engine automatically stops if the vehicle is stopped, the engine is warmed up, the battery is well charged, and A/C compressor operation is not being used. Activate inspection mode when continuous operation of the engine is required.
• The LEXUS GS450h has a motor TRAC function. When the wheel speed of the rear wheels exceeds that of the front wheels, the wheel speed of the rear wheels is restrained. It is necessary to activate inspection mode and deactivate the motor TRAC function when turning only the rear wheels using a speedometer tester.

1. Vehicle conditions
   1. Before activating inspection mode, turn the air conditioning off, start the engine with the selector lever in the P position, and check that the engine stops within several seconds after starting (engine warm up check).
   2. Activate inspection mode and inspect the vehicle. The shift position for each test is as follows:
      TEST ITEM REFERENCE CHART
      
      

      Test item	Shift position	Inspection mode
      Vehicle straight traveling test (side slip inspection)	D	ON or OFF
      Braking force test	N	ON or OFF
      Speedometer test	D	ON
      Exhaust gas test (idling)	P	ON
      Headlight test	P	ON or OFF

   3. Reset inspection mode immediately after completion of the inspection.
      NOTE: Driving the vehicle without resetting inspection mode may damage the transmission.
2. Special notes for speedometer test
   NOTE: Do not use the speedometer tester to perform rapid starting or quick acceleration/deceleration without first setting the proper load on the vehicle. Failing to set the load may damage the transmission.
   1. Depress the accelerator pedal slowly and gradually accelerate the vehicle. Make a measurement.
   2. After the measurement, use the brake pedal to gradually decelerate the vehicle.
3. Special note for using the chassis dynamometer
   1. Always set an appropriate load before starting the test.
4. Activating inspection mode (using the Techstream):
   1. Connect the Techstream to the DLC3.
   2. Turn the power switch ON (IG).
   3. Turn the Techstream ON.
   4. Select from the Techstream menus: Powertrain, Hybrid Control, Utility, Inspection Mode - 2WD Inspection.
   5. Check that "MAINTENANCE MODE" and "CHECK VSC" is displayed alternately on the multi-information display.
   6. Turn the power switch ON (READY), and the "READY" light is illuminated in the combination meter.
   NOTE:

   • The idling speed in inspection mode is approximately 1,000 rpm.
   • The engine speed increases to 1,500 rpm if the accelerator pedal is depressed less than 60%. If the accelerator pedal is depressed more than 60%, the engine speed increases to 2,500 rpm.
   • If a DTC is set during inspection mode, the master warning light illuminate.
   • When the master warning light illuminates during inspection mode, deactivate inspection mode, and check for DTC(s).