Nissan Murano Z50 (2003 year). Manual — part 74

COMBINATION METERS

DI-17

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Revision; 2004 April

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2.

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect combination meter connector and unified meter and A/C amp. connector.

2.

Check voltage between combination meter harness connector
terminals and ground.

3.

Check voltage between unified meter and A/C amp. harness
connector terminals and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

Harness for open between combination meter and fuse

●

Harness for open between unified meter and A/C amp. and fuse

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M25

21 (Y/R)

Ground

Battery
voltage

Battery
voltage

Battery
voltage

20 (O)

0V

0V

Battery
voltage

PKIA2488E

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M50

21 (Y/R)

Ground

Battery
voltage

Battery
voltage

Battery
voltage

22 (G)

0V

0V

Battery
voltage

M51

46 (W/L)

0V

0V

Battery
voltage

PKIA1998E

DI-18

COMBINATION METERS

Revision; 2004 April

2003 Murano

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between combination meter harness connector
terminals and ground.

3.

Check continuity between unified meter and A/C amp. harness
connector terminals and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair harness or connector.

Symptom Chart 1

AKS004G6

Symptom Chart 2

AKS004G7

Terminals

Continuity

(+)

(–)

Connector

Terminal

(Wire color)

M25

22 (B)

Ground

Yes

23 (B)

24 (B)

PKIA2489E

Terminals

Continuity

(+)

(–)

Connector

Terminal

(Wire color)

M50

29 (B)

Ground

Yes

30 (B)

PKIA1999E

Trouble phenomenon

Possible cause

Indication is irregular for the speedometer and odo/trip meter.

Refer to

DI-19, "Vehicle Speed Signal Inspection"

.

Tachometer indication is malfunction.

Refer to

DI-21, "Engine Speed Signal Inspection"

.

Water temperature gauge indication is malfunction.

Refer to

DI-22, "Water Temperature Signal Inspection"

.

Fuel gauge indication is malfunction.

Refer to

DI-23, "Fuel Level Sensor Signal Inspection 1"

.

Low-fuel warning lamp indication is irregular.

Refer to

DI-24, "Fuel Level Sensor Signal Inspection 2"

.

Indications are irregular for more than one gauge.

Replace combination meter.

CVT position indicator is malfunction.

Refer to

DI-72, "CVT INDICATOR"

.

Illumination control does not operate.

Refer to

DI-27, "Odo/Trip Meter and Illumination Control Switch

Inspection"

.

Displayed item [Code]

Inspection contents

Possible cause

CAN COMM CIRC [U1000]

Inspect the CAN communication.

Refer to

DI-24, "CAN Communication System Inspection"

.

CAUTION:

Even when there is no malfunction on CAN communica-
tion system, malfunction may be misinterpreted when bat-
tery has low voltage (when maintaining 7V-8V for about 2
seconds) or 10A fuse [No. 19, located in the fuse block (J/
B)] fuse is disconnected.

COMBINATION METERS

DI-19

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Revision; 2004 April

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Vehicle Speed Signal Inspection

AKS004G8

1.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

Perform the ABS actuator and electric unit (control unit) self-diagnosis. Refer to

BRC-112, "CONSULT-II Func-

tions"

(with VDC system) or

BRC-41, "CONSULT- II Functions"

(without VDC system).

OK or NG

OK

>> GO TO 2.

NG

>> Check applicable parts.

2.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL

1.

Start engine and drive vehicle at approximately 40 km/h (25 MPH).

2.

Check voltage signal between combination meter harness con-
nector M25 terminal 14 (V/W) and ground with simple oscillo-
scope of CONSULT-II.

OK or NG

OK

>> Replace combination meter.

NG

>> GO TO 3.

3.

CHECK VOLTAGE OF COMBINATION METER

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector, shift lock control unit connector, display control unit
connector (with NAVI), display unit connector (without NAVI) and audio unit connector (BOSE system).

3.

Turn ignition switch ON.

4.

Check voltage between combination meter harness connector
M25 terminal 14 (V/W) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Replace combination meter.

METER COMM CIRC [B2202]

Inspect the communication line
between combination meter and
unified meter and A/C amp.

Refer to

DI-24, "Communication Line Inspection"

.

VEHICLE SPEED CIRC [B2205]

Inspect the vehicle speed input
signal.

Perform the ABS actuator and electric unit (control unit) self-
diagnosis. Refer to

BRC-112, "CONSULT-II Functions"

(with

VDC system) or

BRC-41, "CONSULT- II Functions"

(without

VDC system).

CAUTION:

Even when there is no malfunction on speed signal sys-
tem, malfunction may be misinterpreted when battery has
low voltage (when maintaining 7V-8V for about 2 seconds).

Displayed item [Code]

Inspection contents

Possible cause

14 (V/W) - Ground:

SKIA7263E

PKIA1935E

Approx. 12V

SKIA7264E

DI-20

COMBINATION METERS

Revision; 2004 April

2003 Murano

4.

CHECK CONTINUITY BETWEEN COMBINATION METER AND UNIFIED METER AND A/C AMP.

1.

Disconnect combination meter connector.

2.

Check continuity between combination meter harness connector
M25 terminal 14 (V/W) and unified meter and A/C amp. harness
connector M50 terminal 26 (V/W).

3.

Check continuity between combination meter harness connector
M25 terminal 14 (V/W) and ground.

OK or NG

OK

>> Replace unified meter and A/C amp. Refer to

DI-60,

"Removal and Installation of Unified Meter and A/C
Amp."

.

NG

>> Repair harness or connector.

Continuity should exist.

Continuity should not exist.

PKIA2491E

COMBINATION METERS

DI-21

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Revision; 2004 April

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Engine Speed Signal Inspection

AKS004G9

1.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL

1.

Start engine and select “METER A/C AMP” on CONSULT-II.

2.

Using “TACHO METER” on the data monitor, compare the value
of data monitor with tachometer pointer of combination meter.

OK or NG

OK

>> GO TO 2.

NG

>> Replace combination meter.

2.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Select “ENGINE” on CONSULT-II.

2.

Using “ENG SPEED” on the data monitor, print out the CON-
SULT-II screen when the engine is idling.

3.

Select “METER A/C AMP” on CONSULT-II.

4.

Using “TACHO METER” on the data monitor, compare the value
of data monitor of the idling speed with that of the “ENG
SPEED”.

OK or NG

OK

>> Perform ECM self-diagnosis. Refer to

EC-92, "TROU-

BLE DIAGNOSIS"

.

NG

>> Replace unified meter and A/C amp. Refer to

DI-60,

"Removal and Installation of Unified Meter and A/C
Amp."

.

PKIA2090E

SKIA4367E

DI-22

COMBINATION METERS

Revision; 2004 April

2003 Murano

Water Temperature Signal Inspection

AKS004GA

1.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL

1.

Start engine and select “METER A/C AMP” on CONSULT-II.

2.

Using “W TEMP METER” on the data monitor, compare the
value of data monitor with water temperature gauge pointer of
combination meter.

OK or NG

OK

>> GO TO 2.

NG

>> Replace combination meter.

2.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Select “ENGINE” on CONSULT-II.

2.

Using “COOLAN TEMP/S” on the data monitor, print out the
CONSULT-II screen.

3.

Select “METER A/C AMP” on CONSULT-II.

4.

Using “W TEMP METER” on the data monitor, compare the
value of data monitor with that of the “COOLAN TEMP/S”.

OK or NG

OK

>> Perform ECM self-diagnosis. Refer to

EC-92, "TROU-

BLE DIAGNOSIS"

.

NG

>> Replace unified meter and A/C amp. Refer to

DI-60,

"Removal and Installation of Unified Meter and A/C
Amp."

.

Water temperature gauge pointer

Reference value of data monitor [

°

C (

°

F)]

Hot

Approx. 130 (266)

Middle

Approx. 70 - 105 (158 - 221)

Cold

Approx. 50 (122)

PKIA2091E

SKIA4368E

COMBINATION METERS

DI-23

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Revision; 2004 April

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Fuel Level Sensor Signal Inspection 1

AKS004GB

The following symptoms do not indicate a malfunction.

FUEL GAUGE

●

Depending on vehicle position or driving circumstance, the fuel in the tank flows and the pointer may fluc-
tuate.

●

If the vehicle is fueled with the ignition switch ON, the pointer will move slowly.

1.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Select “METER A/C AMP” on CONSULT-II.

2.

Using “FUEL METER” on the data monitor, compare the value of
data monitor with fuel gauge pointer of combination meter.

OK or NG

OK

>> GO TO 2.

NG

>> Replace combination meter.

2.

CHECK FUEL LEVEL SENSOR

Check components. Refer to

DI-29, "FUEL LEVEL SENSOR UNIT CHECK"

.

OK or NG

OK

>> GO TO 3.

NG

>> Replace fuel level sensor unit.

3.

CHECK FUEL LEVEL SENSOR CIRCUIT 1

1.

Disconnect fuel level sensor unit and fuel pump (main) connector and unified meter and A/C amp. con-
nector.

2.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B17 terminal 2 (G/B) and unified
meter and A/C amp. harness connector M50 terminal 28 (G/B).

3.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B17 terminal 2 (G/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

Fuel gauge pointer

Reference value of data monitor [lit.]

Full

Approx. 78

Three quarters

Approx. 63

Half

Approx. 43

A quarter

Approx. 22

Empty

Approx. 7

PKIA2088E

Continuity should exist.

Continuity should not exist.

PKIA2593E

DI-24

COMBINATION METERS

Revision; 2004 April

2003 Murano

4.

CHECK FUEL LEVEL SENSOR CIRCUIT 2

1.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B17 terminal 5 (B/W) and unified
meter and A/C amp. harness connector M50 terminal 36 (B/W).

2.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B17 terminal 5 (B/W) and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair harness or connector.

5.

CHECK INSTALLATION CONDITION

Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the
internal components in the fuel tank.

OK or NG

OK

>> Replace unified meter and A/C amp. Refer to

DI-60, "Removal and Installation of Unified Meter

and A/C Amp."

.

NG

>> Install fuel level sensor unit properly.

Fuel Level Sensor Signal Inspection 2

AKS004GC

The following symptoms do not indicate a malfunction.

LOW-FUEL WARNING LAMP

Depending on vehicle position or driving circumstance, the fuel in the tank flows and the warning lamp ON tim-
ing may change.

1.

CHECK FUEL GAUGE

Check if fuel gauge is normally operating.

OK or NG

OK

>> Replace combination meter.

NG

>> Go to

DI-23, "Fuel Level Sensor Signal Inspection 1"

.

CAN Communication System Inspection

AKS004GE

1.

CHECK CAN COMMUNICATION

1.

Select “SELF-DIAG RESULTS” mode for “METER A/C AMP” with CONSULT-II.

2.

Print out CONSULT-II screen.

>> Go to “CAN system”. Refer to

LAN-10, "Precautions When Using CONSULT-II"

.

Communication Line Inspection

AKS004GF

1.

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check combination meter, unified meter and A/C amp. and terminals (combination meter-side, unified
meter and A/C amp.-side and harness-side) for looseness or bent terminals.

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

Continuity should exist.

Continuity should not exist.

PKIA1941E

COMBINATION METERS

DI-25

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Revision; 2004 April

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2.

CHECK METER/GAUGES VISUALLY

Does the pointer on the meter/gauges fluctuate at the engine start?

Is the fluctuation acceptable?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

CHECK CONTINUITY COMMUNICATION CIRCUIT (TX: COMBINATION METER)

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and unified meter and A/C amp. connector.

3.

Check continuity between combination meter harness connector
M25 terminal 18 (R/L) and unified meter and A/C amp. harness
connector M49 terminal 19 (R/L).

4.

Check continuity between combination meter harness connector
M25 terminal 18 (R/L) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

4.

CHECK VOLTAGE OF UNIFIED METER AND A/C AMP.

1.

Connect unified meter and A/C amp. connector.

2.

Turn ignition switch ON.

3.

Check voltage between combination meter harness connector
M25 terminal 18 (R/L) and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Replace unified meter and A/C amp. Refer to

DI-60,

"Removal and Installation of Unified Meter and A/C
Amp."

.

Continuity should exist.

Continuity should not exist.

PKIA2493E

Approx. 5V

SKIA4869E

DI-26

COMBINATION METERS

Revision; 2004 April

2003 Murano

5.

CHECK VOLTAGE SIGNAL OF COMBINATION METER

1.

Turn ignition switch OFF and connect combination meter connector.

2.

Turn ignition switch ON.

3.

Check voltage signal between combination meter harness con-
nector M25 terminal 18 (R/L) and ground with simple oscillo-
scope of CONSULT-II.

OK or NG

OK

>> Replace unified meter and A/C amp. Refer to

DI-60, "Removal and Installation of Unified Meter

and A/C Amp."

.

NG

>> Replace combination meter.

6.

CHECK CONTINUITY COMMUNICATION CIRCUIT (RX: COMBINATION METER)

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and unified meter and A/C amp. connector.

3.

Check continuity between combination meter harness connector
M25 terminal 19 (R/B) and unified meter and A/C amp. harness
connector M49 terminal 9 (R/B).

4.

Check continuity between combination meter harness connector
M25 terminal 19 (R/B) and ground.

OK or NG

OK

>> GO TO 7.

NG

>> Repair harness or connector.

7.

CHECK VOLTAGE OF COMBINATION METER

1.

Connect combination meter connector.

2.

Turn ignition switch ON.

3.

Check voltage between unified meter and A/C amp. harness
connector M49 terminal 9 (R/B) and ground.

OK or NG

OK

>> GO TO 8.

NG

>> Replace combination meter.

18 (R/L) - Ground:

SKIA7794E

SKIA3361E

Continuity should exist.

Continuity should not exist.

PKIA2492E

Approx. 5V

SKIA4871E

COMBINATION METERS

DI-27

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Revision; 2004 April

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8.

CHECK VOLTAGE SIGNAL OF UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF and connect unified meter and A/C amp. connector.

2.

Turn ignition switch ON.

3.

Check voltage signal between combination meter harness con-
nector M25 terminal 19 (R/B) and ground with simple oscillo-
scope of CONSULT-II.

OK or NG

OK

>> Replace combination meter.

NG

>> Replace unified meter and A/C amp. Refer to

DI-60, "Removal and Installation of Unified Meter

and A/C Amp."

.

Odo/Trip Meter and Illumination Control Switch Inspection

AKS004GH

1.

CHECK ODO/TRIP METER AND ILLUMINATION CONTROL SWITCH

1.

Remove combination meter. Refer to

DI-29, "Removal and Installation of Combination Meter"

.

2.

Remove meter lid. Refer to

DI-30, "Disassembly and Assembly of Combination Meter"

.

3.

Check continuity between odo/trip meter and illumination control
switch harness connector M303 terminals 3, 4 or 5 and 6.

OK or NG

OK

>> Replace combination meter.

NG

>> Replace odo/trip meter and illumination control switch.

19 (R/B) - Ground:

SKIA7795E

SKIA3362E

Terminal

Condition

Continuity

3

6

Illumination control switch (+) is pushed.

Yes

Illumination control switch (+) is released.

No

4

Illumination control switch (–) is pushed.

Yes

Illumination control switch (–) is released.

No

5

Odo/trip meter switch is pushed.

Yes

Odo/trip meter switch is released.

No

PKIA2587E

DI-28

COMBINATION METERS

Revision; 2004 April

2003 Murano

Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or Varies

AKS004GI

1.

CHECK FUEL GAUGE FLUCTUATION

Test drive vehicle to see if gauge fluctuates only during driving or before or after stopping.
Does the indication value vary only during driving or before or after stopping?

YES

>> The pointer fluctuation may be caused by fuel level change in the fuel tank. Condition is normal.

NO

>> Ask the customer about the situation when the symptom occurs in detail, and perform the trouble

diagnosis.

Fuel Gauge Does Not Move to Full-position

AKS004GJ

1.

QUESTION 1

Does it take a long time for the pointer to move to full-position?

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

QUESTION 2

Was the vehicle fueled with the ignition switch ON?

YES or NO

YES

>> Be sure to fuel the vehicle with the ignition switch OFF. Otherwise, it will take a long time to move

to full-position because of the characteristic of the fuel gauge.

NO

>> GO TO 3.

3.

QUESTION 3

Is the vehicle parked on an incline?

YES or NO

YES

>> Check the fuel level indication with vehicle on a level surface.

NO

>> GO TO 4.

4.

QUESTION 4

During driving, does the fuel gauge pointer move gradually toward empty-position?
YES or NO

YES

>> Check the fuel level sensor unit. Refer to

DI-29, "FUEL LEVEL SENSOR UNIT CHECK"

.

NO

>> The float arm may interfere or bind with any of the components in the fuel tank.

COMBINATION METERS

DI-29

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Revision; 2004 April

2003 Murano

Electrical Components Inspection

AKS004GK

FUEL LEVEL SENSOR UNIT CHECK

For removal, refer to

FL-5, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

.

Check Fuel Level Sensor Unit and Fuel Pump (Main)

Check resistance between fuel level sensor unit and fuel pump
(main) connector terminal 2 and 6.

*1 and *2: When float rod is in contact with stopper.

Check Fuel Level Sensor Unit and Pump (Main) Harness

Check continuity between fuel level sensor unit and fuel pump
(main) connector terminal 5 and 7.

Check Fuel Level Sensor Unit (Sub)

Check resistance between fuel level sensor unit and fuel pump
(main) connector terminals 6 and 7.

*1 and *2: When float rod is in contact with stopper.

Removal and Installation of Combination Meter

AKS004GL

REMOVAL

1.

Remove driver's instrument lower cover. Refer to

IP-11,

"Removal and Installation"

.

2.

Remove column cover. Refer to

IP-11, "Removal and Installa-

tion"

.

3.

Remove screws (2) and remove combination meter.

INSTALLATION

Install in the reverse order of removal.

Terminal

Float position

mm (in)

Resistance value

Ω

2

6

*1

Empty

15 (0.59)

Approx. 81.5

*2

Full

193 (7.6)

Approx. 2.5

PKIA2594E

Continuity should exist.

PKIA2596E

Terminal

Float position

mm (in)

Resistance value

Ω

6

7

*1

Empty

10 (0.39)

Approx. 45.2

*2

Full

198 (7.8)

Approx. 2.5

PKIA2595E

PKIA2435E

DI-30

COMBINATION METERS

Revision; 2004 April

2003 Murano

Disassembly and Assembly of Combination Meter

AKS004GM

DISASSEMBLY

1.

Remove screws (2). Disconnect odo/trip meter and illumination
control switch and hazard switch connectors and remove meter
lid.

2.

Remove screws (3) and remove odo/trip meter and illumination
control switch.

1.

Meter lid

2.

Odo/trip meter and illumination con-
trol switch

3.

Screws

4.

Unified meter control unit assembly

5.

Screws

6.

Switch cover (Left side)

7.

Rear cover

8.

Screws

9.

Switch cover (Right side)

10. Bracket

11. Screws

PKIA2436E

PKIA2437E

PKIA2438E

COMBINATION METERS

DI-31

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Revision; 2004 April

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3.

Remove screws (2) and remove switch cover.

4.

Remove screws (2) and remove rear cover.

5.

Disengaged the tabs (2) to separate bracket.

6.

Remove bulbs.

ASSEMBLY

Assemble in the reverse order of disassembly.

PKIA2439E

PKIA2440E

DI-32

UNIFIED METER AND A/C AMP

Revision; 2004 April

2003 Murano

UNIFIED METER AND A/C AMP

PFP:27760

System Description

AKS004GN

●

For the unified meter and A/C amp., the signal line required for controlling the combination meter are inte-
grated in the A/C auto amp.

●

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to

ATC-25, "AIR CONDITIONER CONTROL"

in ATC section.

●

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

●

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

●

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

●

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) or display control unit (with NAVI)
using CAN communication.

●

The unified meter and A/C amp. have a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor, data monitor).

INPUT/OUTPUT SIGNALS
Between Unified Meter and A/C amp. and Combination Meter

Unit

Input

Output

Unified meter and A/C amp.

●

Seat belt buckle switch signal (Driver's side)

●

Parking brake signal

●

Illumination control nighttime required signal

●

Refuel status signal

●

Low-fuel warning lamp condition signal

●

Combination meter receive error signal

●

Delivery destination data signal

●

Combination meter specifications signal

●

Vehicle speed signal (8-pulse)

●

Engine speed signal

●

Engine coolant temperature signal

●

Fuel level sensor signal (resistance value)

●

Malfunction indicator signal

●

ABS warning lamp signal

●

Low tire pressure warning signal

●

Brake warning lamp signal

●

AWD warning lamp signal

●

Turn indicator signal

●

High beam request signal

●

VDC OFF indicator lamp signal

●

SLIP indicator lamp signal

●

ASCD CRUISE indicator lamp signal

●

ASCD SET indicator lamp signal

●

AWD lock indicator lamp signal

●

CVT indicator lamp signal

●

CVT position indicator signal

●

Second position indicator signal

●

Manual mode indicator signal

●

Manual mode gear position signal

●

CAN communication condition signal of CVT

●

Door switch signal

●

Oil pressure switch signal

●

Position lights request signal

●

Buzzer output signal