Cruise Control Computer Circuit Inspection Of Computer Circuit

Disconnect the computer and inspect the connector on the wire harness side as shown in the chart below.

Terminal

Connection or Measure Item

Check Item

Tester Connection

Condition

Voltage or Resistance Vak*

1

Stop Light Switch and Release Valve

Resistance

1 -2

Brake pedal returned

About 68 ft

2

Release Valve and Control Valve

-

-

3

Control Valve

Resistance

3-2

About 30 SI

4

Control Switch (Set/Coast)

Continuity

4 - Body Ground

Turn set/coast switch on Turn set/coast switch off

Continuity No continuity

5

OD Relay

-

-

-

6

Speed Sensor

-

7

Main Switch

Voltage

7 - Body Ground

Turn ignition switch and main switch on

Turn ignition switch and main switch off

Battery voltage No voltage

8

Stop Light Switch

Voltage

8 - Body Ground

Brake pedal depressed Brake pedal returned

Battery voltage No voltage

9

STOP Fuse

Voltage

9 - Body Ground

-

Battery voltage

to

Body Ground

Continuity

10 - Body Ground

-

Continuity

11

Clutch Switch Neutral Switch

Continuity

11 - Body Ground

Clutch pedal depressed or shift into "N" range

Clutch pedal returned or shift into except "N" range

Continuity No continuity

12

Parking Brake Switch

Voltage

12 - Body Ground

Parking brake pulled Parking brake returned

No voltage Battery voltage

13

Control Switch (Accel/Rcsume)

Continuity

13 — Body Ground

Turn accel/resume switch on Turn accel/resume switch off

Continuity No continuity

Pf

ft"

T1

2

H

I™

[TÏ

12

T

ESI

r h

¡30

29

bc0111

! Analog Meter

Main Switch

INSPECTION OF MAIN SWITCH

INSPECT SWITCH CONTINUITY

Switcft^erfnmal position

1

2

3

4

5

OFF

o-

—0

ON

o-

—O

o-

If continuity is not as specified, replace the switch.

Control Switch

INSPECTION OF CONTROL SWITCH

INSPECT SWITCH CONTINUITY

Inspect the switch continuity between terminals.

Terminal

Switch - - __ position

28 Sr

30 Ss

Ew

SET/COAST

_ y-\

\J

OFF

ACCEL/RESUME

r\

°

If continuity is not as specified, replace the switch.

Clutch Switch

INSPECTION OF CLUTCH SWITCH

INSPECT SWITCH CONTINUITY

(a) Check that there is continuity between terminals 2 and 3 with the clutch pedal depressed.

(b) Check that there is no continuity between terminals 2 and 3 with the clutch pedal returned.

If continuity is not as specified, replace the switch.

Neutral Start Switch

(See page AT-104)

Parking Brake Switch

Speed Sensor

INSPECTION OF SPEED SENSOR

1. INSPECT SENSOR CONTINUITY (ANALOG METER)

Check that there is continuity between terminals C-6 and C-7 four times per each revolution of the shaft.

If continuity is not as specified, replace the sensor.

2. INSPECT SENSOR CONTINUITY (DIGITAL METER) (See page BE-42)

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