Inspection of Electronic Control Components

When a voltmeter is connected to the DLC1, 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 DLC1.
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 k Ohms/Volt.

2. TURN IGNITION SWITCH TO ON BUT DO NOT START THE ENGINE.
3. CHECK THROTTLE POSITION SENSOR SIGNAL.



- Check if the voltage changes from approximately 0.0 volts to approximately 8 Volts when the accelerator pedal is gradually depressed from the fully closed position.

4. CHECK BRAKE SIGNAL (LOCK-UP CUT SIGNAL)
- Open the throttle valve fully to apply approximately 8 volts to terminal TT.
- In this condition, check terminal TT voltage when the brake pedal is depressed and released.

TT terminal voltage:
When brake pedal is depressed: 0.0 volts
When brake pedal is released: 8.0 volts

5. START ENGINE.
6. CHECK SHIFT POSITION SIGNAL (VEHICLE SPEED ABOVE 10 KM/H OR 6 MPH)
- Check up-shifting together with terminal TT voltage.
HINT: Check for light shocks from up-shifting and for changes in the tachometer.





- If terminal TT output voltage check cannot be done, check TT terminal circuit.
Refer to the Non-Trouble Code Charts.
Testing and Inspection