Circuit Inspection

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 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 k Ohms/V.

2. TURN IGNITION SWITCH TO ON (DO NOT START THE ENGINE).





3. CHECK THROTTLE POSITION SENSOR SIGNAL.
- Check if the voltage changes from approximately 0 V to approximately 8 V 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 V to terminal TT.
- 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 60 KM/H OR 37 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 performed, perform the check of terminal TT circuit.
Refer to Non-Trouble Code Charts.