Test Mode Procedure

NOTE: Always perform test mode procedures on a level surface. During test mode, the vehicle tilts severely. Before performing test mode procedures, prevent damage to the vehicle by making sure there are no tool boxes, lifts, etc. near the vehicle.

HINT:

When entering the test mode, all test mode DTCs are stored. During the inspection, if an ECU is determined to be normal, its corresponding test mode DTC is erased from memory.
After returning to the normal mode, all test mode DTCs are erased.

TEST MODE OPERATION METHOD
1. Turn the engine switch off.
2. Connect Techstream to the DLC3.
3. Turn the engine switch on (IG) and press Techstream main switch ON.
4. Following the displays on the tester, select test mode and confirm that test mode is operating.
  NOTE:
  - The steering wheel must be in the neutral position.
  - A vehicle speed signal must not be present.
  HINT:
  
  After entering test mode, it is indicated on the multi-information display.
  
  Fig 1: Identifying Multi-Information Display
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Confirm that the multi-information display turns off and that test mode finishes.

TEST MODE DTC CHART

DTC Code	Detection Item	Trouble Area
C194F	Left/right steering operation complete	Test mode operation error Signal from steering sensor not received HINT: The warning light illuminates when a malfunction is detected
C1950	Left/right steering malfunction signal input to front active stabilizer control ECU	Front active stabilizer control ECU Front active stabilizer control actuator Wire harness
C1951	Left/right steering malfunction signal input to rear active stabilizer control ECU	Rear active stabilizer control ECU Rear active stabilizer control actuator Wire harness