AT1–36 AT340E (2JZ–GE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING DLC2 DLC2 TT E1 O04239 S-17-1 Z13409 T_T Terminal Voltage (V) 8 7 6 5 4 3 2 1 (Voltage) (close) Throttle Valve Opening Angle (Open) Z7131 Z09981 CHECK TERMINAL TT OUTPUT VOLTAGE When a voltmeter is connected to the DLC2, the following items can be checked: 1. Throttle position sensor signal 2. Brake signal 3. Shift position signal 1. VOLTMETER CONNECTION Connect the positive (+) probe of the voltmeter to terminal TT and the negative (–) probe to terminal E1 of the DLC2. HINT: If a voltmeter with small internal resistance is used, the correct voltage will not be indicated, so use a voltmeter with an internal resistance of at least 10 kΩ/V. 2. TURN IGNITION SWITCH TO ON (DO NOT START THE ENGINE) 3. CHECK THROTTLE POSITION SENSOR SIGNAL Check if the voltage changes from approx. 0 V to approx. 8 V when the accelerator pedal is gradually depressed from the fully closed position. 4. CHECK BRAKE SIGNAL (LOCK–UP CUT SIGNAL) (a) Open the throttle valve fully to apply approx. 8 V to terminal TT. (b) In this condition, check terminal TT voltage when the brake pedal is depressed and released. TT terminal voltage: 0 V (When brake pedal is depressed) 8 V (When brake pedal is released) 5. START ENGINE 6. CHECK SHIFT POSITION SIGNAL (VEHICLE SPEED ABOVE 9 km/h, 6 mph) Check up–shifting together with terminal TT voltage. HINT: Check for light shocks from up–shifting and for changes in the tachometer. Gear Position Terminal TT output voltage 1st Gear 0 V 2nd Gear 2 V 2nd Lock–up 3 V 3rd Gear 4 V 3rd Lock–up 5 V O/D 6 V O/D Lock–up 7 V If terminal TT output voltage check cannot be done, do the check of TT terminal circuit on page AT1–95.