Page 654 of 2543
BRAKE FLUID LEVEL WARNING
INSPECTION
1. INSPECT SWITCH
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the connector.
(c) Check that there is no continuity between terminals with the
switch OFF (float up).
(d) Use syphon, etc. to take fluid out of the reservoir tank.
(e) Check that there is continuity between terminals with the
switch ON (float down).
(f) Pour the fluid back in the reservoir tank.
If operation is not as specified, replace the switch.
2. INSPECT WARNING LIGHT
(a) Disconnect the connector from the brake fluid warning
switch.
(b) Release the parking brake pedal.
(c) Connect terminals on the wire harness side of the level
warning switch connector.
(d) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.
PARKING BRAKE WARNING
INSPECTION
1. INSPECT SWITCH
(a) Check that there is continuity between terminal and switch
body with the switch ON (switch pin released).
(b) Check that there is no continuity between terminal and switch
body with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch or inspect
ground point.
2. INSPECT WARNING LIGHT
(a) Disconnect the connector from the parking brake switch and
the brake fluid warning switch.
(b) Ground terminal on the wire harness side connector.
(c) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect
wire harness. BE±52
± BODY ELECTRICAL SYSTEMCOMBINATION METER
Page 766 of 2543
CUSTOMER PROBLEM ANALYSIS
CRUISE CONTROL Check Sheet
Inspector 's
Name:
Registration No.
Customer 's Name Registration Year //
Frame No.
Date Vehicle
Brought In
//
Odometer Reading
km
Miles
Date Problem First Occurred //
How Often does Problem Occur?
Continuous Intermittent ( Times a day)
Vehicle Speed when Problem Occurred
km/h
mph Vehicle Speed when Problem Occurred mph
Auto cancel occurs
Driving condition
City driving Freeway Up hill Down hill
After cancel occurred, did the driver activate cruise
control again?
Yes No
Cancel does not occur
With brake ON With parking brake ON
EXCEPT D RANGE At 40 km/h (25 mph) or less
When control SW turns to CANCEL position
Symptoms
Cruise control
malfunction
Slip to acceleration side
Slip to acceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch malfunction SET ACCEL. COAST RESUME CANCEL
Faulty CRUISE MAIN
indicator light
Remains ON Does not light up Blinking
Diagnostic Trouble 1st Time Normal Code Malfunction Code (Code )
Code Check
2nd Time
Normal Code Malfunction Code (Code )
BE±164± BODY ELECTRICAL SYSTEM
CRUISE CONTROL SYSTEM
Page 771 of 2543
INPUT SIGNAL CHECK
Output Code
1. (a) For check No.1 No.3
Turn the ignition switch on.
(b) For check No.4
Jack up the vehicle.
Start the engine.
2. Turn the control switch to SET/COAST position or RES/ACC
position and hold it down or up (1).
3. Push the main switch on (2).
4. Check that the CRUISE MAIN indicator light blinks twice or
3 times repeatedly.
5. Turn the SET/COAST switch or RES/ACC position off.
6. Operate each switch as listed in the table below.
7. Read the blinking pattern of the CRUISE MAIN indicator light.
8. After performing the check, turn the main switch off.
HINT: When two or more signals are input to the ECU, only
the lowest±numbered code is displayed.
Turn SET/COAST switch ON.
Turn RES/ACC switch ON.
Turn CANCEL switch ON.
Turn stop light switch ON.
(Depress brake pedal)
Turn parking brake switch ON.
(Pull up the parking brake lever).
Turn neutral start switch OFF.
(Shift to EXCEPT D RANGE).
Turn clutch switch OFF.
(Depress clutch pedal)
Drive at 40 km/h (25 mph) or
higher.
Drive at 40 km/h (25 mph) or
below.
SET/COAST switch circuit is
normal.
RES/ACC switch circuit is
normal.
CANCEL switch circuit is
normal.
Stop light switch circuit is
normal.
Parking brake switch circuit
is normal.
Neutral start switch circuit is
normal.
Clutch switch circuit is
normal.
Speed sensor is normal.
DiagnosisOperation MethodCRUISE MAIN Indicator Light
Blinking Pattern
± BODY ELECTRICAL SYSTEMBE±169CRUISE CONTROL SYSTEM
Page 772 of 2543
IN±35BE±171BE±197BE±179BE±182BE±191BE±189BE±177BE±184BE±165IN±30
See page
Inspection Item
Problem
ªCRUISEº Indicator light blinks.
Cruise control system does not set.
Cruse control system does not
operate.
Diagnosis Trouble Code
Indicator light does not light up
Large speed drop when the cruise control switch
turned to SET.
Vehicle speed fluctuates when cruise control
switch turned to SET.
Set speed deviates on high or low side.
Acceleration response is sluggish when cruise
control switch turned to ªACCELº or ªRESUMEº
Cruise control system does not set.
Cruise control system does not operate.
Set speed does not cancel when brake pedal
depressed.
Set speed does not cancel when parking brake
lever pulled.
Cruise control not cancelled, even when
transmission is shifted to EXCEPT D RANGE.
Set speed does not cancel when clutch pedal
depressed.
Set speed does not cancel when cruise control
switch turned to CANCEL.
Vehicles speed does not decrease when cruise
control switch turned to COAST.
Vehicle speed does not accelerate when cruise
control switch turned to ACCEL.
Vehicle speed does not return to memorized
cruise when control switch turned to RESUME.
Speed can be set below about 40 km/h
(25 mph.)
Cruise control does not disengage even at about
40 km/h (25 mph) or less.
Indicator LightCruise Control ECUActuatorMain Switch
(in Control Switch)Control SwitchStop Light SwitchClutch Switch or Park/
Neutral Position SwitchParking Brake SwitchVehicle Speed SensorSpeed Control Cable
FunctionThrottle Position Sensor
(IDL)Wire Harness
Source voltage drop
MATRIX CHART OF PROBLEM SYMPTOMS
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes of
the malfunction are shown in the order of their probability. Inspect each part in the order shown, and replace
the part when it is found to be faulty. BE±170
± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM
Page 775 of 2543
DTC 12 Actuator Magnet Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnet clutch inside the actuator during cruise control operation according to the signal
from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control, the rotor shaft
between the motor and control plate is released.
When the brake pedal is depressed, the stoplight switch turns on, supplying electrical power to the stoplight.
Power supply to the magnet clutch is mechanically cut and the magnet clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the magnet
clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the set speed, then cruise control
at the set speed is resumed.
Code No. Diagnosis Trouble area
12
Overcurrent (short) in magnet clutch
circuit.
Open (0.8 sec) in magnet clutch circuit.
Cruise control magnet clutch.
Harness or connector between ECU and
magnet clutch, magnet clutch and body
ground.
ECU
± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEMBE±173
Page 776 of 2543
(See page IN±30)
(1) Connect positive lead to terminal 5 and negative
lead to terminal 4 of actuator connector.
(2) Move the control plate by hand.
Replace stop light switch.
Repair or replace harness or connector.
Check for open and short in harness and connectors between ECU and stop light switch,
stop light switch and magnet clutch, magnet clutch and body ground. (See page
IN±30).
(1) Remove cruise control actuator.
(2) Disconnect actuator connector.
Move the control plate by hand.
Control plate moves. (Magnet clutch off)
Control plate doesn't move. (Magnet clutch on)
Replace actuator assembly.
Disconnect stop light switch connector.
Check continuity between terminals.
Continuity
Terminals
Switch pin free
Switch position
(Brake pedal depressed)
Switch pin pushes in
(Brake pedal released)
Check actuator magnet clutch.
Check stop light switch.
INSPECTION PROCEDURE
Proceed to next circuit inspection shown on matrix chart (See page BE±170).
However, when diag. trouble code 12, is displayed, check harness and connector for loose
connection. If connection is normal, check and replace ECU.
BE±174± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM
Page 784 of 2543
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake is on, battery voltage normally applies through the stop fuse and stop switch to terminal STP±of
the ECU, and the ECU turns the cruise control off.
A fail±safe function is provided so that cancel functions normally, even if there is a malfunction in the stop light
signal circuit.
(1) If the harness connected to terminal STP±has an open, terminal STP±will have battery positive voltage
and the cruise control will be turned off, also SET not occurring.
(2) If the stop fuse is open, terminal STP + becomes approx.
0 V when the brake is turned on, so the ECU performs cancel function normally.
Also, when the brake is on, the magnetic clutch is cut mechanically by the stop light switch, turning the cruise
control off. (See page BE±173 for operation of the magnetic clutch.)
WIRING DIAGRAM
BE±182± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM
Page 785 of 2543
chart (See page BE±170).
Proceed to next circuit inspection shown on matrix
chart (See page
BE±170).
(1) See input signal check on page BE±169.
(2) Check the indicator light when the brake pedal is
depressed.
Check operation of stop light.
Check voltage between terminal STP+, STP± of ECU connector and body
ground.
(1) Turn ignition switch ON.
(2) Measure voltage between terminal STP+, STP±
of ECU connector and body ground, when the
brake pedal is depressed and released.
Remove ECU with connectors still connected.
Input signal check.
Proceed to next circuit inspection shown on matrix
chart (See page
BE±170).
The indicator light goes off when the brake pedal is de-
pressed.
Check the stop light comes on when the brake pedal is depressed, and turns off when brake pedal is re-
leased.
Check stop light circuit.
Repair or replace harness or connector.
Check and replace ECU.
Check for open in harness and connectors between terminal STP+ of ECU and stop
light switch, terminal STP± of ECU and stop light switch (See page
IN±30).
Depressed
Released
INSPECTION PROCEDURE
± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEMBE±183
