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K ELECTRICAL

B
SECTION
DRIVER INFORMATION SYSTEM C

E
CONTENTS
METERS AND GAUGES ........................................... 3 . GAUGE (QR25DE MODELS) ............................ 22 . F
Component Parts and Harness Connector Location 3 ..... Electrical Components Inspection ......................... 23 .
System Description ................................................. 4
. FUEL LEVEL SENSOR UNIT CHECK ............... 23 .
UNIFIED CONTROL METER ............................... 4 . THERMAL TRANSMITTER CHECK (QG18DE G
HOW TO CHANGE THE DISPLAY FOR ODO/ MODELS) ........................................................... 23.
TRIP METER ....................................................... 4
. VEHICLE SPEED SENSOR SIGNAL CHECK ... 23
POWER SUPPLY AND GROUND CIRCUIT ....... 4 . WARNING LAMPS ................................................... 24 .
H
WATER TEMPERATURE GAUGE ....................... 4 . Schematic .............................................................. 24
.
TACHOMETER .................................................... 5 . WITHOUT TACHOMETER ................................. 24 .
FUEL GAUGE ...................................................... 5
. WITH TACHOMETER ........................................ 25 .
SPEEDOMETER .................................................. 5 . Wiring Diagram -- WARN -- ................................. 26 . I
Combination Meter .................................................. 6
. WITHOUT TACHOMETER ................................. 26 .
WITHOUT TACHOMETER .................................. 6 . WITH TACHOMETER ........................................ 29 .
WITH TACHOMETER (QG18DE MODELS) ........ 7 . Electrical Components Inspection ......................... 33 . J
WITH TACHOMETER (QR25DE MODELS) ........ 8 . FUEL WARNING LAMP OPERATION CHECK ... 33
Schematic ............................................................... 9
. OIL PRESSURE SWITCH CHECK .................... 33 .
WITHOUT TACHOMETER .................................. 9 . DIODE CHECK .................................................. 33 .
DI
WITH TACHOMETER ........................................ 10 . WARNING CHIME .................................................... 34 .
Wiring Diagram -- METER -- ................................11 . Component Parts and Harness Connector Location 34 ...
WITHOUT TACHOMETER .................................11 . System Description ................................................ 35 .
WITH TACHOMETER (QG18DE MODELS) ...... 12 . WITHOUT POWER DOOR LOCKS ................... 35 . L
WITH TACHOMETER (QR25DE MODELS) ...... 13 . WITH POWER DOOR LOCKS ........................... 35 .
Meter/Gauge Operation and Odo/Trip Meter Seg- Wiring Diagram -- CHIME -- ................................ 37 .
ment Check in Diagnosis Mode ............................ 14 . WITHOUT POWER DOOR LOCKS ................... 37 . M
DIAGNOSIS FUNCTION .................................... 14 . WITH POWER DOOR LOCKS ........................... 38 .
HOW TO ALTERNATE DIAGNOSIS MODE ...... 14 . CONSULT-II Inspection Procedure (With Power
Trouble Diagnoses ................................................ 15
. Door Locks) ........................................................... 39
.
PRELIMINARY CHECK ..................................... 15 . "KEY WARN ALM"/"LIGHT WARN ALM"/"SEAT
SYMPTOM CHART ............................................ 16 . BELT ALM" ......................................................... 39.
POWER SUPPLY AND GROUND CIRCUIT CONSULT-II Application Items (With Power Door
CHECK ............................................................... 17
. Locks) .................................................................... 40
.
INSPECTION/VEHICLE SPEED SENSOR ....... 18 . "KEY WARN ALARM" ......................................... 40 .
INSPECTION/ENGINE REVOLUTION SIGNAL 19 ... "LIGHT WARN ALM" .......................................... 40 .
INSPECTION/FUEL LEVEL SENSOR UNIT "SEAT BELT ALM" .............................................. 40 .
AND FUEL PUMP .............................................. 20 . Trouble Diagnoses (Without Power Door Locks) ... 41
INSPECTION/THERMAL TRANSMITTER SYMPTOM CHART ............................................ 41 .
(QG18DE MODELS) .......................................... 21 . POWER SUPPLY AND GROUND CIRCUIT
INSPECTION/WATER TEMPERATURE CHECK ............................................................... 41
.
DIAGNOSTIC PROCEDURE 1 (LIGHTING
SWITCH INPUT SIGNAL CHECK) ..................... 43 .

DI-1
DIAGNOSTIC PROCEDURE 2 (KEY SWITCH CHECK ...............................................................47
.
INSERT SIGNAL CHECK) ................................. 44
. DIAGNOSTIC PROCEDURE 1 (LIGHTING
DIAGNOSTIC PROCEDURE 3 (SEAT BELT SWITCH INPUT SIGNAL CHECK) .....................49 .
BUCKLE SWITCH LH CHECK) .......................... 45 . DIAGNOSTIC PROCEDURE 2 (KEY SWITCH
DIAGNOSTIC PROCEDURE 4 .......................... 45 . INSERT SIGNAL CHECK) ..................................50 .
Trouble Diagnoses (With Power Door Locks) ........ 47 . DIAGNOSTIC PROCEDURE 3 (SEAT BELT
SYMPTOM CHART ............................................ 47
. BUCKLE SWITCH LH CHECK) ..........................51 .
POWER SUPPLY AND GROUND CIRCUIT DIAGNOSTIC PROCEDURE 4 ...........................52 .

DI-2
METERS AND GAUGES

METERS AND GAUGES PFP:24814
A
Component Parts and Harness Connector Location EKS002B3

WKIA0158E

DI-3
METERS AND GAUGES

System Description EKS002B4

UNIFIED CONTROL METER
q Speedometer, odo/trip meter, tachometer (if equipped), fuel gauge and water temperature gauge are con-
trolled totally by control unit built-in combination meter.
q Digital meter is adopted for odo/trip meter.*
*The record of the odometer is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.
q Odo/trip meter segment can be checked in diagnosis mode.
q Meter/gauge can be checked in diagnosis mode.
HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER

SEL253V

NOTE:
Turn ignition switch to the ON position to operate odo/trip meter.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times:
q through 10A fuse [No. 12, located in the fuse block (J/B)]
q to combination meter terminal 25 (without tachometer) or 42 (with tachometer).
With the ignition switch in the ON or START position, power is supplied:
q through 10A fuse [No. 30, located in the fuse block (J/B)]
q to combination meter terminal 26 (without tachometer) or 41 (with tachometer).
Ground is supplied:
q to combination meter terminal 27 (without tachometer) or 48 (with tachometer)
q through body grounds M28 and M54.
WATER TEMPERATURE GAUGE
QG18DE
The water temperature gauge indicates the engine coolant temperature. The reading on the gauge is based
on the resistance of the thermal transmitter.
As the temperature of the coolant increases, the resistance of the thermal transmitter decreases. A variable
ground is supplied to terminal 31 (without tachometer) or 43 (with tachometer) of the combination meter for the
water temperature gauge. The needle on the gauge moves from "C" to "H".
QR25DE
The water temperature gauge indicates the engine coolant temperature. The reading on the gauge is based
on the signal from the ECM.
The water temperature gauge is regulated by a signal:
q from terminal 32 of the ECM
DI-4
METERS AND GAUGES

q to combination meter terminal 43 for the water temperature gauge.
A
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
The tachometer is regulated by a signal:
B
q from terminal 32 (with QG18DE), or terminal 36 (with QR25DE) of the ECM
q to combination meter terminal 45 for the tachometer.
FUEL GAUGE C
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied:
q to combination meter terminal 30 (without tachometer) or 44 (with tachometer) for the fuel gauge D
q from terminal 2 of the fuel level sensor unit and fuel pump
q through terminal 5 of the fuel level sensor unit and fuel pump, and
q through body grounds B13 and B19. E

SPEEDOMETER
The combination meter receives a voltage signal from the vehicle speed sensor for the speedometer. F
The voltage is supplied:
q to combination meter terminal 29 (without tachometer) or 47 (with tachometer) for the speedometer
q from terminal 1 (with QG18DE), or terminal + (with QR25DE) of the vehicle speed sensor. G
The speedometer converts the voltage into the vehicle speed displayed.

DI-5
METERS AND GAUGES

Combination Meter EKS002B5

WITHOUT TACHOMETER

WKIA0005E

DI-6
METERS AND GAUGES

WITH TACHOMETER (QG18DE MODELS)
A

WKIA0006E

DI-7
METERS AND GAUGES

WITH TACHOMETER (QR25DE MODELS)

WKIA0007E

DI-8
METERS AND GAUGES

Schematic EKS002B6

WITHOUT TACHOMETER A

WKWA0045E

DI-9
METERS AND GAUGES

WITH TACHOMETER

WKWA0110E

DI-10
METERS AND GAUGES

Wiring Diagram -- METER -- EKS002B7

WITHOUT TACHOMETER A

WKWA0047E

DI-11
METERS AND GAUGES

WITH TACHOMETER (QG18DE MODELS)

WKWA0048E

DI-12
METERS AND GAUGES

WITH TACHOMETER (QR25DE MODELS)
A

WKWA0049E

DI-13
METERS AND GAUGES

Meter/Gauge Operation and Odo/Trip Meter Segment Check in Diagnosis Mode
EKS002B8

DIAGNOSIS FUNCTION
q Odo/trip meter segment can be checked in diagnosis mode.
q Meters/gauges can be checked in diagnosis mode.
HOW TO ALTERNATE DIAGNOSIS MODE
1. Turn ignition switch to ON and change odo/trip meter to "TRIP A" or "TRIP B".
2. Turn ignition switch to OFF.
3. Turn ignition switch to ON when pushing odo/trip meter switch.
4. Release odo/trip meter switch 1 second after ignition switch is turned ON.
5. Push odo/trip meter switch three times within 7 seconds.
6. All odo/trip meter segments should be turned on.
NOTE:
If some segments are not turned on, combination meter should
be replaced.
At this point, the unified control meter is turned to diagnosis
mode.

SEL110V

7. Push odo/trip meter switch. Indication of each meter/gauge
should be as shown in figure during pushing odo/trip meter
switch.
NOTE:
It takes a few seconds for indication of fuel gauge and water
temperature gauge to become stable.
8. Turn ignition switch to OFF or start engine to cancel diagnosis
mode.

WEL128

DI-14
METERS AND GAUGES

Trouble Diagnoses EKS002B9

PRELIMINARY CHECK A

WKIA0159E

*1: DI-14 *2: DI-17 *3: DI-16

DI-15
METERS AND GAUGES

SYMPTOM CHART
Symptom Possible causes Repair order
One meter/gauge (speed- 1. Sensor signal 1. Check the sensor for malfunctioning meter/gauge.
ometer/tachometer/fuel - Vehicle speed signal DI-18, "INSPECTION/VEHICLE SPEED SENSOR"
gauge/water temp. gauge) - Engine revolution signal DI-19, "INSPECTION/ENGINE REVOLUTION SIGNAL"
is malfunctioning. - Fuel gauge DI-20, "INSPECTION/FUEL LEVEL SENSOR UNIT
- Water temp. gauge AND FUEL PUMP"
2. Unified meter control unit DI-21, "INSPECTION/THERMAL TRANSMITTER
Multiple meters/gauges (QG18DE MODELS)"
(except odo/trip meter) are DI-22, "INSPECTION/WATER TEMPERATURE
malfunctioning. GAUGE (QR25DE MODELS)"
2. Replace combination meter assembly.

Before starting trouble diagnoses below, perform "PRELIMINARY CHECK", DI-15, "PRELIMINARY CHECK" .

DI-16
METERS AND GAUGES

POWER SUPPLY AND GROUND CIRCUIT CHECK
Power Supply Circuit Check A

WITHOUT TACHOMETER
Terminals Ignition switch position B
(+) (-) OFF ACC ON
Battery Battery Battery
25 Ground
voltage voltage voltage C
Battery
26 Ground 0V 0V
voltage

WITH TACHOMETER D

Terminals Ignition switch position
(+) (-) OFF ACC ON E
Battery Battery Battery
42 Ground
voltage voltage voltage
Battery F
41 Ground 0V 0V
voltage

LEL421

If NG, check the following. H
q 10A fuse [No. 12, located in fuse block (J/B)]
q 10A fuse [No. 30, located in fuse block (J/B)]
I
q Harness for open or short between fuse and combination meter
Ground Circuit Check
WITHOUT TACHOMETER J
Terminals
(+)
Continuity DI
Terminal (-)
Connector
(Wire color)
M30 27 (B) Ground Yes L
WITH TACHOMETER
Terminals
M
(+)
Continuity
Terminal (-)
Connector
(Wire color)
M30 48 (B) Ground Yes

WEL422

DI-17
METERS AND GAUGES

INSPECTION/VEHICLE SPEED SENSOR

1. CHECK VEHICLE SPEED SENSOR OUTPUT
1. Remove vehicle speed sensor from transmission.
2. Check voltage between combination meter terminal 29 (without tachometer) or 47 (with tachometer) and
ground while quickly turning speed sensor pinion.

LEL660

OK or NG
OK >> Vehicle speed sensor is OK.
NG >> GO TO 2.

2. CHECK VEHICLE SPEED SENSOR
Check resistance between vehicle speed sensor connector F43 ter-
minals 1 and 2 (with QG18DE), or connector F36 terminals + and -
(with QR25DE).
Resistance Approx. 250
OK or NG
OK >> Check the following.
q Harness between combination meter and vehicle
speed sensor.
q Vehicle speed sensor ground circuit.

NG >> Replace vehicle speed sensor.

WKIA0016E

DI-18
METERS AND GAUGES

INSPECTION/ENGINE REVOLUTION SIGNAL
A
1. CHECK ECM OUTPUT
1. Start engine. B
2. Check voltage between combination meter terminal 45 and ground at idle and 2,000 rpm.

LEL436

OK or NG F
OK >> Engine revolution signal is OK.
NG >> Harness for open or short between ECM and combination meter.
G

DI-19
METERS AND GAUGES

INSPECTION/FUEL LEVEL SENSOR UNIT AND FUEL PUMP

1. CHECK GROUND CIRCUIT FOR FUEL LEVEL SENSOR UNIT
Check harness continuity between fuel level sensor unit and fuel pump connector terminal 5 and ground.

WEL437

OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.

2. CHECK FUEL LEVEL SENSOR UNIT
Refer to DI-23, "FUEL LEVEL SENSOR UNIT CHECK" .
OK or NG
OK >> GO TO 3.
NG >> Replace fuel level sensor unit.

3. CHECK HARNESS FOR OPEN OR SHORT
1. Disconnect combination meter connector and fuel level sensor unit and fuel pump connector.
2. Check continuity between combination meter terminal 30 (without tachometer) or terminal 44 (with
tachometer) and fuel level sensor unit and fuel pump connector terminal 2.
Continuity should exist.
3. Check continuity between combination meter terminal 30 (without tachometer) or terminal 44 (with
tachometer) and ground.

WEL438

Continuity should not exist.
OK or NG
OK >> Fuel level sensor unit is OK.
NG >> Repair harness or connector.

DI-20
METERS AND GAUGES

INSPECTION/THERMAL TRANSMITTER (QG18DE MODELS)
A
1. CHECK THERMAL TRANSMITTER
Refer to DI-23, "THERMAL TRANSMITTER CHECK (QG18DE MODELS)" . B
OK or NG
OK >> GO TO 2.
NG >> Replace thermal transmitter. C

2. CHECK HARNESS FOR OPEN OR SHORT
D
1. Disconnect combination meter connector and thermal transmitter connector.
2. Check continuity between combination meter terminal 31 (without tachometer) or terminal 43 (with
tachometer) and thermal transmitter terminal 1.
Continuity should exist. E
3. Check continuity between combination meter terminal 31 (without tachometer) or terminal 43 (with
tachometer) and ground.
Continuity should not exist. F

I
WEL439

OK or NG
J
OK >> Thermal transmitter is OK.
NG >> Repair harness or connector.

DI-21
METERS AND GAUGES

INSPECTION/WATER TEMPERATURE GAUGE (QR25DE MODELS)

1. CHECK ECM OUTPUT
1. Disconnect combination meter.
2. Check voltage between combination meter harness connector
M30 terminal 43 (PU/W) and ground.
Battery voltage should exist.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.

WKIA0106E

2. CHECK HARNESS FOR OPEN OR SHORT
1. Disconnect ECM connector.
2. Check continuity between combination meter harness connector
M30 terminal 43 (PU/W) and ECM harness connector F54 termi-
nal 32 (PU).
Continuity should exist.
3. Check continuity between combination meter harness connector
M30 terminal 43 (PU/W) and ground.
Continuity should not exist.
OK or NG
OK >> GO TO 3. WKIA0107E
NG >> Repair harness or connector.

3. CHECK WATER TEMPERATURE OUTPUT SIGNAL
1. Connect combination meter connector and ECM connector.
2. Start engine.
3. Check output signal between combination meter harness con-
nector M30 terminal 43 (PU/W) and ground. (Use "SIMPLE
OSCILLOSCOPE" in "SUB MODE" with CONSULT-II.)
Reading should be as shown.
OK or NG
OK >> Replace combination meter.
NG >> Check ECM.
SKIA0987E

DI-22
METERS AND GAUGES

Electrical Components Inspection EKS002BA

FUEL LEVEL SENSOR UNIT CHECK A
q For removal, refer to FL-3, "Removal" (with QG18DE except
CALIF. CA), or FL-7, "Removal" (with QG18DE CALIF. CA and
QR25DE). B
Check the resistance between terminals 2 and 5.
Ohmmeter Resistance
Float position mm (in) C
(+) (-) (Approximate)

*1 Full 136.1 (5.358) 4.5 - 5.5
2 5 *2 1/2 89.8 (3.535) 31.5 - 33.5 D
*3 Empty 31.3 (1.232) 80 - 83 MEL372K

*1 and *3: When float rod is in contact with stopper.
E
THERMAL TRANSMITTER CHECK (QG18DE MODELS)
Check the resistance between the terminals of thermal transmitter
and body ground.
F
Water temperature Resistance (Approximate)
60

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