Inspection Of Electric Control Components

1. INSPECT VOLTAGE OF ECT COMPUTER CONNECTOR

(a) Remove the glove box.

(b) Turn on the ignition switch.

(c) Measure the voltage at each terminal.

Terminal

Measuring condition

Voltage IV»

DENSO type computer

AISIN type computer

L. - GND

Throttle valve fully closed

5

12

Throttle valve fully closed to fully open

5 to 0

12 to 0

Throttle valve fully open

0

-

L2 - GND

Throttle valve fully closed

5

12

Throttle valve fully closed to fully open

5 to 0 to 5

12 to 0 to 12

Throttle valve fully open

5

12

Ls - GND

Throttle valve fully closed

5

12

Throttle valve fully closed to fully open

5 to 0 to 5 to 0 to 5

12 to 0 to 12 to 0 to 12

Throttle valve fully open

5

12

IDL - GND

Throttle valve fully closed

0

-

Throttle valve opening above 1.5°

12

-

SP. - GND

Standing still

5 or 0

12 or 0

Engine running, vehicle moving

2.5

6

BR - GND

When brake pedal is depressed

12

-

When brake pedal is not depressed

0

-

2 - GND

2 range

9 to 16

Except 2 range

0 to 2

L - GND

L range

9 to 16

-

Except L range

0 to 2

-

Si - GND

12

-

SÍ. S3 - GND

0

ODi - GND

Coolant temp, below 65°C (149°F>

0

-

Coolant temp, above 75°C (167°F)

5

12

ODÎ - GND

OD main switch turn ON

5

12

OD main switch turn OFF

0

IG - GND

Standing still

12

SP2 - GND

Standing still

5 or 0

Engine running

4

-

PWR - GND

PWR pattern

12

-

Except PWR pattern

Oto 2

+ B - GND

12

2. INSPECT SOLENOID

(a) Disconnect the connector from the ECT ECU.

(b) Measure the resistance between Si, Si, S3 and ground.

(c) Apply battery voltage to the solenoid. At this time, check that an operation noise can be heard from 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

(a) Shift the lever into the L or 2 range.

(b) Disconnect the connector near the starter motor.

(c) Check that there is continuity between L, 2 and ground.

4. INSPECT THROTTLE POSITION SENSOR

Using an ohmmeter, check the resistance between each terminal.

^Termlna^

Throttle valve condition

Resistance (kO)

IDL - E?

Fully closed

0

Open

Infinity

Vc - E 2

3-7

Via - E?

Fully closed

0.2 - 0.8

Fully open

3.3 - 10

5. INSPECT BRAKE SIGNAL

Check that the brake light comes on when the brake pedal is depressed.

ATOJlfl

6. INSPECT SPEED SENSOR NO.2

(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 Oft to ooft.

ANALOG Type

SPD®SPD© DIGITAL Type^

SPD®SPD© DIGITAL Type^

7. INSPECT SPEED SENSOR NO.1 IN COMBINATION METER

[Analog Type]

(a) Remove the combination meter.

(b) Connect an ohmmeter between terminals SPD 0and SPD ©.

(c) Revolve the meter shaft and check that the meter needle repeatedly deflects from 0U to ooiJ.

(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 defects from OV to 2V.

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.

—Terminal Pattern"^--^^

2

4

3

NORM

PWR

o-

-o

9. INSPECT OD SWITCH

Inspect that there is continuity between 1 and 3.

Terminal position

1

3

ON

OFF

10. INSPECT LOCK-UP MECHANISM

(a) Warm up the coolant and ATF.

<b) Connect a voltmeter to the DG terminal and body ground.

(c) Select the normal pattern.

(d) Drive at around 50 km/h (31 mph) to where 7,5 or 3V appears on the voltmeter (this is the lock-up range).

(e) Depress the accelerator pedal and read the tachometer. If there is a big jump in engine rpm there is no lock-up.

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