Inspection of Electronic Control Components
INSPECTION ELECTRONIC CONTROL COMPONENTS1. INSPECT VOLTAGE OF ECT COMPUTER CONNECTOR
(a) Remove the glove box and instrument panel.
(b) Turn on the ignition switch.
(c) Measure the voltage at each terminal.
2. INSPECT SOLENOID
(a) Disconnect the connector from the ECT computer.
(b) Measure the resistance between S1, S2 SL and ground.
STD: 11-15 OHM
(c) Apply battery voltage to the solenoid. Check that an operation noise can be heard form the solenoid.
NOTE: If there is foreign matter in the solenoid valve, there will be no fluid control even with solenoid operation.
3. INSPECT NEUTRAL START SWITCH
Inspect that there is continuity between terminal LLC, 2L-C and NL-C.
4. INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, check the resistance between each terminal.
5. INSPECT SPEED SENSOR EN ATM
(a) Jack up a front wheel on one side.
(b) Connect an ohmmeter between the terminals.
(c) Spin the wheel and check that the meter needle deflects from O to ohm.
6. INSPECT SPEED SENSOR IN COMBINATION METER (ANALOG Type)
(a) Remove the combination meter.
(b) Connect an ohmmeter between the terminals.
(c) Revolve the meter shaft and check that the meter needle repeatedly deflects from 0 ohm.
7. INSPECT PATTERN SELECTION SWITCH
Inspect that there is continuity between 5 and each terminal.
NOTE: As there are diodes inside, be careful of the tester probe polarity.
8. INSPECT OD SWITCH
Inspect that there is continuity between terminals 1 and 3.
9. INSPECT LOCK-UP MECHANISM
(a) Warm up the coolant and ATF.
(b) Connect a voltmeter to the service connector terminals ECT and E1.
(c) Turn the OD switch ON.
(d) Select the normal pattern.
(e) Drive at around 50 km/h (31 mph) to where 7,5 or 3 volts appears on the voltmeter (this is the lock-up range).
(f) Depress the accelerator pedal and read the tachometer. If there is a big jump in engine rpm there is not lock-up.
10. INSPECT BRAKE SIGNAL
Check that the brake light comes on when the brake pedal is depressed.