Inspection of Electronic Control Components
INSPECTION OF ELECTRONIC CONTROL COMPONENTS1. INSPECT VOLTAGE OF ECT COMPUTER CONNECTOR
a. Remove the cowl side trim of passenger side.
b. Turn on the ignition switch.
Terminals Of ECM/Pinouts Part 1:
Pinouts Part 2:
c. Measure the voltage at each terminal.
2. INSPECT SOLENOID
a. Disconnect the connector from the ECT computer.
b. Measure the resistance between S(1), S(2), S(L) and ground.
STD: 11 - 15 Ohm
c. Apply battery voltage to the solenoid. Check that an operation noise can be heard from the solenoid.
NOTE: If there is foreign material 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 terminals L-C, 2-C and N-C.
4. INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, check the resistance between each terminal.
5. INSPECT BRAKE SIGNAL
Check that the brake light comes on when the brake pedal is depressed.
6. INSPECT SPEED SENSOR NO.2 IN A/T
a. Jack up the rear wheel on one side.
b. Connect an ohmmeter between the connector and ground.
c. Spin the wheel and check that the meter needle deflects from 0 Ohms to infinite Ohms.
7. INSPECT SPEED SENSOR NO.1 IN COMBINATION METER
(Analog Type)
a. Remove the combination meter.
b. Connect an ohmmeter between terminals STD (+) and SPD (-)
c. Revolve the meter shaft and check that the meter needle repeatedly deflects from 0 V to 2 V.
(Digital Type)
a. Remove the combination meter with connected wire harness.
b. Connect a voltmeter between terminals SP and GND.
c. Turn the ignition switch ON.
d. Revolve the meter shaft and check that the voltmeter needle repeatedly deflects from 0 V to 2 V.
8. INSPECT PATTERN SELECTION SWITCH
Inspect that there is continuity between 2 and each terminal.
NOTE: As there are diodes inside, be careful of the tester probe polarity.
9. INSPECT OD SWITCH
Inspect that there is continuity between terminals 1 and 3.
10. INSPECT LOCK-UP MECHANISM
a. Warm up the coolant and ATF.
b. Connect a voltmeter to terminals between ECT and E(1).
c. Connect a tachometer to terminal IG (-).
d. Select the normal pattern.
e. Drive at around 50 kph (31 mph) until 7, 5 or 3 V appears on the voltmeter (this is lock-up range).
f. Depress the accelerator pedal and read the tachometer. If there is a big jump in engine rpm there is no lock-up.
NOTE: The lock-up clutch will turn ON only infrequently during normal 2nd and 3rd gear operation. To trigger this action, press the accelerator pedal to 50% or more of its stroke. At less than 50%, the voltage may change in the sequence 2 V - 4 V - 6 V - 7 V.