Contents Wiring diagrams Section: Communication Devices All sections

Driver Information System: Other Nissan Frontier D40

Communication Devices 27 illustrations ~4933 words

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SUPPLEMENTAL RESTRAINT SYSTEM and SEAT BELTS articles.

WARNINGTo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SUPPLEMENTAL RESTRAINT SYSTEM article . Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this information. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Commercial Service Tool

COMMERCIAL SERVICE TOOL REFERENCE Tool name Description Power tool Loosening bolts and nuts

Scheme 26

Scheme 26: Commercial Service Tool

Identifying Combination Meter. Scheme 27

Scheme 1: Identifying Combination Meters Component And Harness Connector Location

UNIFIED METER CONTROL UNIT

  1. Speedometer, odometer, tachometer, fuel gauge, oil pressure gauge, voltage gauge, and water temperature gauge are controlled by the unified meter control unit, which is built into the combination meter.
  2. Warning indicators are controlled by signals drawn from the CAN communication system, BCM (body control module), and components connected directly to the combination meter.
  3. Digital meter is adopted for odometer/trip meters*, as well as the A/T position indicator display. *The record of the odometer is kept even if the battery cable is disconnected.
  4. Odometer/trip meters and A/T indicator segments can be checked in diagnosis mode.
  5. Meters/gauges can be checked in diagnosis mode.

Note. Under the following conditions, the meters will perform a homing function. The meter pointers will move down slightly and then move back to the resting position. This is a normal design condition. Approximately 60 seconds after turning the ignition switch from the ON to the OFF position If the battery is disconnected and then reconnected

Illumination control

The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge (VQ40DE models), voltage gauge (VQ40DE models), A/T indicator, fuel and temperature gauge lighting when the ignition switch is turned on. When the lighting switch is turned on, the illumination control switch can be used to adjust the brightness of the combination meter illumination and the odometer/trip meters and meter illumination.

POWER SUPPLY AND GROUND CIRCUIT

Power is supplied at all times

  1. through 10A fuse [No.19, located in the fuse block (J/B)]
  2. to combination meter terminal 3.

With the ignition switch in the ON or START position, power is supplied

  1. through 10A fuse [No.14, located in the fuse block (J/B)]
  2. to combination meter terminal 16.

Ground is supplied

  1. to combination meter terminals 13 and 23
  2. through body grounds M57, M61 and M79.

WATER TEMPERATURE GAUGE

The water temperature gauge indicates the engine coolant temperature.

ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.

ENGINE OIL PRESSURE GAUGE (VQ40DE MODELS)

The engine oil pressure gauge indicates whether the engine oil pressure is low or normal.

The oil pressure gauge is controlled by the IPDM E/R (intelligent power distribution module engine room). Low oil pressure causes oil pressure switch terminal 1 to provide ground to IPDM E/R terminal 42. The IPDM E/R then signals the combination meter (unified meter control unit) via CAN communication lines and a low oil pressure indication is displayed by the oil pressure gauge.

VOLTAGE GAUGE (VQ40DE MODELS)

The voltage gauge indicates the battery/charging system voltage.

The voltage gauge is regulated by the unified meter control unit.

TACHOMETER

The tachometer indicates engine speed in revolutions per minute (rpm).

ECM provides an engine speed signal to combination meter via CAN communication lines.

FUEL GAUGE

The fuel gauge indicates the approximate fuel level in the fuel tank.

The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied

  1. to combination meter terminal 9
  2. through fuel level sensor unit and fuel pump terminal 2
  3. through fuel level sensor unit and fuel pump terminal 5
  4. from combination meter terminal 4.

SPEEDOMETER

ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN communication lines.

ODO/TRIP METER

The vehicle speed signal and the memory signals from the meter memory circuit are processed by the combination meter and the mileage is displayed.

How to Change the Display

Refer to Owner's Manual for odo/trip meter operating instructions.

Terminals and Reference Values for Combination Meter

Terminal No.Wire colorItemConditionReference value (V) (Approx.)
Ignition switchOperation or condition
3R/YBattery power supplyOFFBattery voltage
4B/YFuel level sensor groundON0
9BRFuel level sensor signalRefer to " FUEL LEVEL SENSOR UNIT INSPECTION ".
11PCAN-L
12LCAN-H
13GRGround0
16W/GIgnition switch ON or STARTONBattery voltage
22BRIllumination control switchLighting switch ONRefer to " ILLUMINATION OPERATION BY LIGHTING SWITCH ".
23BGround0
24VSeat belt buckle switch LHONUnfastened (ON)0
Fastened (OFF)Battery voltage
31GParking Brake switchONParking brake applied0
Parking brake releasedBattery voltage
32SBBrake fluid level switchONBrake fluid level low0
Brake fluid level normalBattery voltage
33LGStop lamp switchONBrake pedal depressedBattery voltage
Brake pedal released0
34LWasher fluid level switchONWasher fluid level low0
Washer fluid level normalBattery voltage
39GSecurity indicator inputOFFSecurity indicator ON0
Security indicator OFFBattery voltage
40LGSeat belt buckle switch RHONUnfastened (ON)0
Fastened (OFF)Battery voltage

CONNECTOR TERMINALS AND REFERENCE VALUES FOR COMBINATION METER

CONSULT-II Function (METER)

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

METER diagnosis modeDescription
SELF-DIAG RESULTSDisplays combination meter self-diagnosis results.
DATA MONITORDisplays combination meter input/output data in real time.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be read.

DIAGNOSTIC TEST MODES

CONSULT-II START PROCEDURE

Refer to " CONSULT-II START PROCEDURE ".

Display Item List

CONSULT-II displayMalfunction
CAN COMM CIRC [U1000]Malfunction is detected in CAN communication lines. CAUTION: Even when there is no malfunction on CAN communication system, malfunction may be misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds) or 10A fuse [No. 19, located in the fuse block (J/B)] is removed.
VEHICLE SPEED CIRC [B2205]Malfunction is detected when an erroneous speed signal is input. CAUTION: Even when there is no malfunction on speed signal system, malfunctions may be misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds).
CAUTION
Even when there is no malfunction on CAN communication system, malfunction may be misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds) or 10A fuse [No. 19, located in the fuse block (J/B)] is removed.
CAUTION
Even when there is no malfunction on speed signal system, malfunctions may be misinterpreted when battery has low voltage (when maintaining 7V-8V for about 2 seconds).

CONSULT-II START PROCEDURE - DISPLAY ITEM LIST

"TIME" indicates the condition of the self-diagnosis results judged by each signal input.

  1. Normal: If the system is presently operating properly, but had a malfunction in the past, the time will indicate "1-63".
  2. Malfunction: Soon after detecting malfunctions by self-diagnoses or current malfunction, "0" is indicated.

After the system returns to normal operating condition, every time the ignition switch is cycled (turned to OFF from ON), a value of one is added to the counter (i.e. "1"-->"2"-->"3"..."63"). When the ignition switch is cycled 64 times, the result of the self-diagnoses will be erased. If a malfunction is detected again, "0" will be indicated.

Display item [Unit]MAIN SIGNALSSELECTION FROM MENUContents
SPEED METER [km/h] or [mph]XXThis is the angle correction value after the speed signal from the ABS actuator and electric unit (control unit) is converted into the vehicle speed.
SPEED OUTPUT [km/h] or [mph]XXThis is the angle correction value before the speed signal from the ABS actuator and electric unit (control unit) is converted into the vehicle speed.
TACHO METER [rpm]XXThis is the converted value for the engine speed signal from the ECM.
W TEMP METER [°C] or [°F]XXThis is the converted value for the water temp signal from the ECM.
FUEL METER [lit.]XXThis is the processed value for the signal (resistance value) from the fuel gauge.
DISTANCE [km]XXThis is the calculated value for the speed signal from the ABS actuator and electric unit (control unit), the signal (resistance signal) from the fuel gauge and fuel consumption from ECM.
FUEL W/L [ON/OFF]XXIndicates [ON/OFF] condition of low-fuel warning lamp.
C-ENG W/L [ON/OFF]XIndicates [ON/OFF] condition of malfunction indicator lamp.
AIR PRES W/L [ON/OFF]XIndicates [ON/OFF] condition of low tire pressure indicator lamp.
SEAT BELT W/L [ON/OFF]XIndicates [ON/OFF] condition of seat belt warning lamp.
BUZZER [ON/OFF]XXIndicates [ON/OFF] condition of buzzer.
DOOR W/L [ON/OFF]XIndicates [ON/OFF] condition of door warning lamp.
HI-BEAM IND [ON/OFF]XIndicates [ON/OFF] condition of high beam indicator.
TURN IND [ON/OFF]XIndicates [ON/OFF] condition of turn indicator.
OIL W/L [ON/OFF]XIndicates [ON/OFF] condition of oil pressure warning lamp.
VDC/TCS IND [ON/OFF]XIndicates [ON/OFF] condition of VDC OFF indicator lamp.
ABS W/L [ON/OFF]XIndicates [ON/OFF] condition of ABS warning lamp.
SLIP IND [ON/OFF]XIndicates [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF]XIndicates [ON/OFF] condition of brake warning lamp. (1)
M RANGE SW [ON/OFF]XXIndicates [ON/OFF] condition of manual mode range switch.
NM RANGE SW [ON/OFF]XXIndicates [ON/OFF] condition of except for manual mode range switch.
AT SFT UP SW [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift-up switch.
AT SFT DWN SW [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift-down switch.
O/D OFF SWITCH [ON/OFF]XIndicates [ON/OFF] condition of O/D OFF switch.
BRAKE SW [ON/OFF]XIndicates [ON/OFF] condition of parking brake switch.
AT-M IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T manual mode indicator.
AT-M GEAR [1, 2, 3, 4, 5]XXIndicates [1, 2, 3, 4, 5] condition of A/T manual mode gear position.
P RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift P range indicator.
R RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift R range indicator.
N RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift N range indicator.
D RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift D range indicator.
4 RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift 4 range indicator.
3 RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift 3 range indicator.
2 RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift 2 range indicator.
1 RANGE IND [ON/OFF]XXIndicates [ON/OFF] condition of A/T shift 1 range indicator.
O/D OFF W/L [ON/OFF]XIndicates [ON/OFF] condition of O/D OFF indicator lamp.
CRUISE IND [ON/OFF]XIndicates [ON/OFF] condition of CRUISE indicator.
SET IND [ON/OFF]XIndicates [ON/OFF] condition of SET indicator.
4WD LOCK SW [ON/OFF]XIndicates [ON/OFF] condition of 4WD lock switch.
4WD LOCK IND [ON/OFF]XIndicates [ON/OFF] condition of 4WD lock indicator.
(1) Monitor keeps indicating "OFF" when brake warning lamp is on because of parking brake operation or low brake fluid level.
(1)Monitor keeps indicating "OFF" when brake warning lamp is on because of parking brake operation or low brake fluid level.

CONSULT-II START PROCEDURE - DATA MONITOR

FUEL LEVEL SENSOR UNIT

The following symptoms do not indicate a malfunction.

  1. Depending on vehicle position or driving circumstance, the fuel in the tank shifts and the indication may fluctuate.
  2. If the vehicle is fueled with the ignition switch ON, the indication will update slowly.
  3. If the vehicle is tilted when the ignition switch is turned ON, fuel in the tank may flow to one direction resulting in a change of reading.

LOW-FUEL WARNING LAMP

Depending on vehicle posture or driving circumstances, the fuel level in the tank varies, and the warning lamp ON timing may be changed.

Scheme 28

Scheme 28: LOW-FUEL WARNING LAMP

Scheme 29

Scheme 29

Scheme 30

Scheme 30
  1. CHECK SELF-DIAGNOSIS Perform the combination meter self-diagnosis. Refer to " «SELF-DIAGNOSIS FUNCTION»(ref-272357-S40430312692007111800000) ". OK or NG OK: GO TO 2. NG: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ".
  2. CHECK HARNESS CONNECTOR Turn ignition switch OFF. Check combination meter and fuel level sensor unit and fuel pump terminals (meter-side and harness side) for poor connection. OK or NG OK: GO TO 3. NG: Repair or replace terminals or connectors.
  3. CHECK HARNESS CONNECTOR OUTPUT SIGNAL Disconnect fuel level sensor unit and fuel pump connector. Turn ignition switch ON. Check voltage between combination meter harness connector M24 terminal 9 and ground. Battery voltage should exist. OK or NG OK: GO TO 4. NG: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". see scheme 12: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 9 And Ground
  4. CHECK HARNESS FOR OPEN OR SHORT CIRCUIT Turn ignition switch OFF. Disconnect combination meter connector M24. Check continuity between combination meter harness connector M24 terminal 9 and fuel level sensor unit and fuel pump harness connector C5 terminal 2. Continuity should exist. Check continuity between fuel level sensor unit and fuel pump harness connector C5 terminal 2 and ground. Continuity should not exist. (Scheme 28): Checking Continuity Between Fuel Level Sensor Unit And Fuel Pump C5 Terminal 2 And Ground OK or NG OK: GO TO 5. NG: Repair harness or connector.
  5. CHECK FUEL LEVEL SENSOR CIRCUIT Check continuity between combination meter harness connector M24 terminal 4 and fuel level sensor unit and fuel pump harness connector C5 terminal 5. Continuity should exist. Check continuity between fuel level sensor unit and fuel pump harness connector C5 terminal 5 and ground. Continuity should not exist. (Scheme 29): Checking Continuity Between Fuel Level Sensor Unit And Fuel Pump C5 Terminal 5 And Ground OK or NG OK: GO TO 6. NG: Repair harness or connector.
  6. CHECK FUEL LEVEL SENSOR UNIT Check the fuel level sensor unit. Refer to " «FUEL LEVEL SENSOR UNIT CHECK»(ref-272357-S17375479962007111800000) ". OK or NG OK: GO TO 7. NG: Replace the fuel level sensor unit. Refer to " «REMOVAL AND INSTALLATION»(ref-272356-S33507983862007111800000) ".
  7. CHECK INSTALLATION CONDITION Check fuel level sensor unit installation, and determine whether the float arm interferes or binds with any of the internal components in the fuel tank. OK or NG OK: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". NG: Install the fuel level sensor unit properly.

Fuel Gauge Fluctuates, Indicates Wrong Value, or Varies

  1. CHECK FUEL GAUGE FLUCTUATION Test drive vehicle to see if gauge fluctuates only during driving or just before or just after stopping. Does the indication value vary only during driving or just before or just after stopping? YES: The fluctuation may be caused by fuel level change in the fuel tank. Condition is normal. NO: Ask the customer in detail about the situation when the symptom occurs. Refer to " «FUEL LEVEL SENSOR UNIT INSPECTION»(ref-272357-S17479070482007111800000) ".

Fuel Gauge Does Not Move to Full-position

  1. CHECK POINTER MOVEMENT TO FULL-POSITION 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. CHECK IGNITION SWITCH POSITION 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 for the pointer to move to full-position because of the characteristic of the fuel gauge. NO: GO TO 3.
  3. OBSERVE VEHICLE POSITION 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. CHECK POINTER MOVEMENT TO EMPTY-POSITION During driving, does the fuel gauge move gradually toward empty-position? YES or NO YES: Check the fuel level sensor unit. Refer to " «FUEL LEVEL SENSOR UNIT CHECK»(ref-272357-S17375479962007111800000) ". NO: Check fuel level sensor unit installation, and determine whether the float arm interferes or binds with any of the internal components in the fuel tank.

FUEL LEVEL SENSOR UNIT CHECK

For removal, refer to " REMOVAL AND INSTALLATION ".

Check Fuel Level Sensor Unit and Fuel Pump

Check resistance between fuel level sensor unit and fuel pump connector terminals 2 and 5.

TerminalsFloat position mm (in)Resistance value ohms (Approx.)
25(1)Empty25.86 (1.02)81.66
(2)Full254.6 (10.02)6.98
(1) When float rod is in contact with stopper. (2) When float rod is in contact with stopper.
(1)When float rod is in contact with stopper.
(2)When float rod is in contact with stopper.

CONNECTOR TERMINAL RESISTANCE REFERENCE

Checking Continuity Between Oil Pressure Switch And Body Ground. Scheme 31

Scheme 15: Checking Fuel Level Sensor Unit

OIL PRESSURE SWITCH CHECK

Check continuity between the oil pressure switch and body ground.

ConditionOil pressure kPa (kg/cm 2 , psi)Continuity
Engine stoppedLess than 29 (0.3, 4)Yes
Engine runningMore than 29 (0.3, 4)No

CONNECTOR TERMINAL CONTINUITY REFERENCE

Scheme 31: Checking Continuity Between Oil Pressure Switch And Body Ground

COMBINATION METER

Refer to " COMBINATION METER ".

OUTSIDE TEMPERATURE DISPLAY

Push the mode (N) switch when the ignition switch is in the ON position. The outside temperature will be displayed in "°F". To change the indication from "°F" to "°C", push and hold the mode (N) switch for about 3 seconds until the display begins to flash. Press the mode (N) switch again to toggle between "°F" and "°C".

DIRECTION DISPLAY

Push the mode (N) switch when the ignition switch is in the ON position. The direction will be displayed.

PRELIMINARY CHECK FOR THERMOMETER

  1. COOL DOWN CHECK Turn the ignition switch to the ON position. Cool down the ambient sensor 2 with water or ice. Does the indicated temperature drop? YES: GO TO 2. NO: The system is malfunctioning. Refer to " «INSPECTION/COMPASS AND THERMOMETER»(ref-272357-S14879821182007111800000) ".
  2. WARM UP CHECK Leave the vehicle for 10 minutes. With the ignition switch in the ON position, disconnect and reconnect the ambient sensor 2 connector. Does the indicated temperature rise? YES: The system is OK. NO: The system is malfunctioning. Refer to " «INSPECTION/COMPASS AND THERMOMETER»(ref-272357-S14879821182007111800000) ".

CORRECTION FUNCTIONS OF COMPASS

The direction display is equipped with automatic correction function.

If the direction is not shown correctly, carry out initial correction.

INITIAL CORRECTION PROCEDURE FOR COMPASS

  1. Pushing the mode (N) switch for about 10 seconds will enter the initial correction mode. The "CAL" icon will illuminate.
  2. Turn the vehicle slowly in an open, safe place. The compass will be calibrated once it has tracked 3 complete circles. NOTE: In places where the terrestrial magnetism is extremely disturbed, the initial correction may start automatically. see scheme 20: Identifying Compass And Thermometer

Wiring Diagram - DI-WARN-01. Scheme 32

Scheme 21: Warning Lamps - Schematic Diagram

Oil Pressure Warning Lamp Stays Off (Ignition Switch ON)

  1. CHECK SELF-DIAGNOSTIC RESULTS OF IPDM E/R Select "IPDM E/R" on CONSULT-II, and perform self-diagnosis of IPDM E/R. Refer to " «SELF-DIAGNOSTIC RESULTS»(ref-272337-S40250253152007111800000) ". Self-diagnostic results content No malfunction detected: GO TO 2. Malfunction detected: GO TO " «DISPLAY ITEM LIST»(ref-272337-S26597026372007111800000) ".
  2. CHECK IPDM E/R INPUT SIGNAL Select "IPDM E/R" on CONSULT-II. Operate ignition switch with "OIL P SW" of "DATA MONITOR" and check operation status. When ignition switch is in ON position (Engine stopped): OIL P SW CLOSE When engine running: OIL P SW OPEN OK or NG OK: Replace combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". NG: GO TO 3. see scheme 30: CONSULT II DATA MONITOR Screen
  3. CHECK OIL PRESSURE SWITCH CIRCUIT Turn ignition switch OFF. Disconnect IPDM E/R connector E122 and oil pressure switch connector F4 (QR25DE) or E208 (VQ40DE). Check continuity between IPDM E/R harness connector E122 (A) terminal 42 and oil pressure switch harness connector F4 (B) terminal 1. Continuity should exist. see scheme 31: Checking Continuity Between IPDM E/R Harness Connector E122 Terminal 42 And Oil Pressure Switch F4 Terminal 1 OK or NG OK: GO TO 4. NG: Repair harness or connector.
  4. CHECK OIL PRESSURE SWITCH Check oil pressure switch. Refer to " «OIL PRESSURE SWITCH CHECK»(ref-272357-S26655123552007111800000) ". OK or NG OK: Replace IPDM E/R. Refer to " «REMOVAL AND INSTALLATION OF IPDM E/R»(ref-272337-S22727732142007111800000) ". NG: Replace oil pressure switch.

Oil Pressure Warning Lamp Does Not Turn Off (Oil Pressure Is Normal)

Note. For oil pressure inspection, refer to " OIL PRESSURE CHECK " (QR25DE) or " OIL PRESSURE CHECK " (VQ40DE).

Scheme 33

Scheme 33: QR25DE Models
  1. CHECK OIL PRESSURE SWITCH CIRCUIT Turn ignition switch OFF. Disconnect IPDM E/R connector E122 and oil pressure switch connector F4. Check continuity between IPDM E/R harness connector E122 terminal 42 and ground. Continuity should not exist. see scheme 32: Checking Continuity Between IPDM E/R Harness Connector Terminal 42 And Ground OK or NG OK: GO TO 2. NG: Repair harness or connector.
  2. CHECK OIL PRESSURE SWITCH Check oil pressure switch. Refer to " «OIL PRESSURE SWITCH CHECK»(ref-272357-S26655123552007111800000) ". OK or NG OK: Replace IPDM E/R. Refer to " «REMOVAL AND INSTALLATION OF IPDM E/R»(ref-272337-S22727732142007111800000) ". NG: Replace oil pressure switch.

VQ40DE Models

  1. CHECK ENGINE OIL PRESSURE GAUGE OPERATION Observe operation of engine oil pressure gauge. Does engine oil pressure gauge function properly? YES: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". NO: Go to " «ENGINE OIL PRESSURE SIGNAL INSPECTION»(ref-272357-S16973149742007111800000) ".

A/T Indicator Does Not Illuminate

  1. CHECK SELF-DIAGNOSIS OF COMBINATION METER Perform combination meter self-diagnosis. Refer to " «SELF-DIAGNOSIS FUNCTION»(ref-272357-S40430312692007111800000) ". OK or NG OK: GO TO 2. NG: Replace combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ".
  2. CHECK TCM Perform self-diagnosis of TCM. Refer to " «SELF-DIAGNOSTIC RESULT MODE»(ref-272346-S35609150582007111800000) ". OK or NG OK: Replace combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". NG: Refer to " «DISPLAY ITEMS LIST»(ref-272346-S11241585292007111800000) ".

Identifying Combination Switch Component And Harness Connector Location. Scheme 34

Scheme 34: Identifying Combination Switch Component And Harness Connector Location

FUNCTION

Power is supplied at all times

  1. through 50A fusible link (letter g, located in the fuse and fusible link box)
  2. to BCM terminal 70
  3. through 10A fuse (No. 25, located in the fuse and fusible link box)
  4. to key switch terminal 2
  5. through 10A fuse [No. 19, located in the fuse block (J/B)]
  6. to combination meter terminal 3.

With ignition switch in ON or START position, power is supplied

  1. through 10A fuse [No. 1, located in the fuse block (J/B)]
  2. to BCM terminal 38
  3. through 10A fuse [No. 14, located in the fuse block (J/B)]
  4. to combination meter terminal 16.

Ground is supplied

  1. to BCM terminal 67 and
  2. to combination meter terminals 13 and 23
  3. through body grounds M57, M61, and M79.

Note. When ignition key warning chime, light warning chime, and seat belt warning chime are required at the same time, the priorities for each chime are the following.

  1. Light warning chime
  2. Ignition key warning chime
  3. Seat belt warning chime

LIGHT WARNING CHIME

With the key removed from the ignition switch, the driver's door open, and the lighting switch (part of the combination switch) in 1st or 2nd position, the warning chime will sound. [Except when headlamp battery saver control operates (5 minutes after ignition switch is turned to OFF or ACC position) and headlamps do not illuminate.]

Signal is supplied

  1. from combination switch (lighting switch) terminals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10
  2. to BCM terminals 2, 3, 4, 5, 6, 32, 33, 34, 35 and 36. NOTE: Lighting switch (detected by BCM) is in 1st or 2nd position. Refer to " «COMBINATION SWITCH READING FUNCTION»(ref-272360-S42684963562007111800000) ".

Ground is supplied

  1. to BCM terminal 47
  2. through front door switch LH terminal 2
  3. through front door switch LH terminal 3 (King Cab)
  4. through body grounds B7 and B19 (King Cab).

Front door switch LH (Crew Cab) is case grounded.

BCM detects headlamps are illuminated, and sends light warning signal to combination meter via CAN communication lines. When the combination meter receives light warning signal, it sounds warning chime.

IGNITION KEY WARNING CHIME

With the key inserted in the ignition switch, the ignition switch in OFF position, and the driver's door open, the warning chime will sound.

Power is supplied

  1. through key switch terminal 1
  2. to BCM terminal 37.

Ground is supplied

  1. to BCM terminal 47
  2. through front door switch LH terminal 2
  3. through front door switch LH terminal 3 (King Cab)
  4. through body grounds B7 and B19 (King Cab).

Front door switch LH (Crew Cab) is case grounded.

BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter via CAN communication lines. When the combination meter receives key warning signal, it sounds warning chime.

SEAT BELT WARNING CHIME

When the ignition switch is turned ON with the driver seat belt unfastened (seat belt buckle switch LH unfastened), warning chime will sound for approximately 6 seconds.

Ground is supplied

  1. to combination meter terminal 24
  2. through seat belt buckle switch LH terminal 1.

Seat belt buckle switch LH terminal 2 is grounded through body grounds B7 and B19.

The combination meter sends seat belt buckle switch LH unfastened signal to BCM via CAN communication line.

BCM receives seat belt buckle switch LH unfastened signal from combination meter via CAN communication line, and sends seat belt warning signal to the combination meter via CAN communication line. When the combination meter receives the seat belt warning signal, it sounds the warning chime. The BCM controls the (6 second) duration of the seat belt warning chime.

Terminals and Reference Values for BCM

Refer to " TERMINALS AND REFERENCE VALUES FOR BCM ".

Refer to " TERMINALS AND REFERENCE VALUES FOR COMBINATION METER ".

CONSULT-II Function (BCM)

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

BCM diagnostic test itemDiagnostic modeDescription
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM for setting the status suitable for required operation, input/output signals are received from the BCM and received data is displayed.
DATA MONITORDisplays BCM input/output data in real time.
ACTIVE TESTOperation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTSDisplays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBERBCM part number can be read.
CONFIGURATIONPerforms BCM configuration read/write functions.

DIAGNOSTIC TEST MODES

Refer to " CONSULT-II START PROCEDURE ".

Monitored itemDescription
IGN ON SWIndicates [ON/OFF] condition of ignition switch.
KEY ON SWIndicates [ON/OFF] condition of key switch.
DOOR SW-DRIndicates [ON/OFF] condition of front door switch (driver side).
LIGHT SW 1STIndicates [ON/OFF] condition of lighting switch.
BUCKLE SWIndicates [ON/OFF] condition of seat belt buckle switch LH.

CONSULT-II START PROCEDURE - DATA MONITOR

Test itemMalfunction is detected when...
LIGHT WARN ALMThis test is able to check light warning chime operation. Light warning chime sounds for 2 seconds after touching "ON" on CONSULT-II screen.
IGN KEY WARN ALMThis test is able to check key warning chime operation. Key warning chime sounds for 2 seconds after touching "ON" on CONSULT-II screen.
SEAT BELT WARN TESTThis test is able to check seat belt warning chime operation. Seat belt warning chime sounds for 2 seconds after touching "ON" on CONSULT-II screen.

CONSULT-II START PROCEDURE - ACTIVE TEST

Monitored ItemCONSULT-II displayDescription
CAN communicationCAN communication [U1000]Malfunction is detected in CAN communication.

SELF-DIAGNOSTIC RESULTS

Note. If "CAN communication [U1000]" is indicated, after printing the monitor item, go to "CAN System". Refer to TROUBLE DIAGNOSIS in LAN System article .

Scheme 35

Scheme 35: All Warning Chimes Do Not Operate
  1. CHECK BCM CHIME OPERATION Select "BUZZER" on CONSULT-II, and perform "LIGHT WARN ALM", "IGN KEY WARN ALM" or "SEAT BELT WARN TEST" active test. Does chime sound? YES: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NO: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". see scheme 37: CONSULT II ACTIVE TEST Screen

Scheme 36

Scheme 36: Key Warning Chime and Light Warning Chime Do Not Operate (Seat Belt Warning Chime Does Operate)

Scheme 37

Scheme 37

Scheme 38

Scheme 38

Scheme 39

Scheme 39

Scheme 40

Scheme 40

Scheme 41

Scheme 41
  1. CHECK BCM INPUT SIGNAL With CONSULT-II Select "BCM" on CONSULT-II. With "DATA MONITOR" of "BUZZER", confirm "DOOR SW-DR" changes with the status of front door LH. When front door LH is opened: DOOR SW-DR ON When front door LH is closed: DOOR SW-DR OFF (Scheme 35): CONSULT II DATA MONITOR Screen Without CONSULT-II Check voltage between BCM harness connector M19 terminal 47 and ground. When front door LH is opened: Approx. 0V When front door LH is closed: Approx. 5V (Scheme 36): Checking Voltage Between BCM Connector M19 Terminal 47 And Ground OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: GO TO 2.
  2. CHECK FRONT DOOR SWITCH LH CIRCUIT Turn ignition switch OFF. Disconnect BCM connector M19 and front door switch LH connector B8 (Crew Cab) or D213 (King Cab). Check continuity between BCM harness connector M19 terminal 47 and front door switch LH harness connector B8 terminal 2 (Crew Cab) or connector D213 terminal 2 (King Cab). Continuity should exist. Check continuity between BCM harness connector M19 terminal 47 and ground. Continuity should not exist. (Scheme 37): Checking Continuity Between BCM Connector M19 Terminal 47 And Front Door Switch LH Connector B8 Terminal 2 OK or NG OK: King Cab, GO TO 3. Crew Cab, GO TO 4. NG: Repair harness or connector.
  3. CHECK GROUND CIRCUIT Check continuity between front door switch LH connector D213 terminal 3 and body ground. Continuity should exist. OK or NG OK: GO TO 4. NG: Repair harness or connector. (Scheme 38): Checking Continuity Between Front Door Switch LH Connector D213 Terminal 3 And Body Ground
  4. CHECK FRONT DOOR SWITCH LH CREW CAB Check continuity between front door switch LH terminal 2 and exposed metal of switch while pressing and releasing switch. When front door switch LH is released: Continuity should exist. When front door switch LH is pushed: Continuity should not exist. (Scheme 39): Checking Continuity Between Front Door Switch LH Terminal 2 And Exposed Metal Of Switch KING CAB Check continuity between front door switch LH terminals 2 and 3 while pressing and releasing switch. When front door switch LH is released: Continuity should exist. When front door switch LH is pushed: Continuity should not exist. OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: Replace the front door switch LH. (Scheme 40): Checking Continuity Between Front Door Switch LH Terminals 2 And 3

Scheme 42

Scheme 42: Key Warning Chime Does Not Operate

Scheme 43

Scheme 43

Scheme 44

Scheme 44

Scheme 45

Scheme 45

Scheme 46

Scheme 46
  1. CHECK FUSE Check if the key switch fuse (No. 25, located in the fuse and fusible link box) is blown. Refer to " «WIRING DIAGRAM - CHIME»(ref-272357-S41124533942007111800000) ". Is the fuse blown? YES: Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse. NO: GO TO 2.
  2. CHECK WARNING CHIME OPERATION With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position. Does warning chime sound? YES: GO TO 3. NO: Go to " «ALL WARNING CHIMES DO NOT OPERATE»(ref-272357-S04839224872007111800000) " or " «KEY WARNING CHIME AND LIGHT WARNING CHIME DO NOT OPERATE (SEAT BELT WARNING CHIME DOES OPERATE)»(ref-272357-S25435484412007111800000) ".
  3. CHECK BCM INPUT SIGNAL With CONSULT-II With "DATA MONITOR" of "BUZZER", confirm "KEY ON SW" changes when the key is inserted/removed from the ignition key cylinder. When key is inserted in ignition key cylinder: KEY ON SW ON When key is removed from ignition key cylinder: KEY ON SW OFF (Scheme 41): CONSULT II Screen Display DATA MONITOR Without CONSULT-II Check voltage between BCM harness connector M18 terminal 37 and ground. CONNECTOR TERMINAL VOLTAGE REFERENCE Terminals Condition Voltage (V) (+) (-) Connector Terminal M18 37 Ground Key is inserted Battery voltage Key is removed 0V (Scheme 42): Checking Voltage Between BCM Connector M18 Terminal 37 And Ground OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: GO TO 4.
  4. CHECK KEY SWITCH Turn ignition switch OFF. Disconnect key switch connector M27. Check continuity between key switch terminals 1 and 2. CONNECTOR TERMINAL CONTINUITY REFERENCE Terminals Condition Continuity 1 2 Key is inserted Yes Key is removed No OK or NG OK: GO TO 5. NG: Replace the key switch. (Scheme 43): Checking Continuity Between Key Switch Terminals 1 And 2
  5. CHECK KEY SWITCH CIRCUIT Disconnect BCM connector M18. Check continuity between BCM harness connector M18 terminal 37 and key switch harness connector M27 terminal 1. Continuity should exist. Check continuity between BCM harness connector M18 terminal 37 and ground. Continuity should not exist. (Scheme 44): Checking Continuity Between BCM Harness Connector M18 Terminal 37 And Ground OK or NG OK: GO TO 6. NG: Repair harness or connector.
  6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT Check voltage between key switch harness connector M27 terminal 2 and ground. Battery voltage should exist. OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: Check harness for open between fuse and key switch. (Scheme 45): Checking Voltage Between Key Switch Harness Connector M27 Terminal 2 And Ground

Scheme 47

Scheme 47: Light Warning Chime Does Not Operate
  1. CHECK WARNING CHIME OPERATION Check key warning chime and seat belt warning chime functions. Do key warning chime and seat belt warning chime sound? YES: GO TO 2. NO: Go to " «ALL WARNING CHIMES DO NOT OPERATE»(ref-272357-S04839224872007111800000) ".
  2. CHECK BCM INPUT SIGNAL With CONSULT-II Select "BCM". With "DATA MONITOR" of "BUZZER", confirm "LIGHT SW 1ST" status changes when the lighting switch is moved from ON (1st position) to OFF. Lighting switch ON (1st position): LIGHT SW 1ST ON Lighting switch OFF: LIGHT SW 1ST OFF (Scheme 46): CONSULT-II Display DATA MONITOR Screen Without CONSULT-II Check combination switch. Refer to " «COMBINATION SWITCH READING FUNCTION»(ref-272360-S42684963562007111800000) ". OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: Check lighting switch. Refer to " «COMBINATION SWITCH READING FUNCTION»(ref-272360-S42684963562007111800000) ".

Scheme 48

Scheme 48: Seat Belt Warning Chime Does Not Operate

Scheme 49

Scheme 49

Scheme 50

Scheme 50
  1. CHECK WARNING CHIME OPERATION With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position. Return lighting switch to OFF position, and insert key into ignition. Does warning chime sound for both steps? YES: GO TO 2. NO: Go to " «ALL WARNING CHIMES DO NOT OPERATE»(ref-272357-S04839224872007111800000) ".
  2. CHECK SEAT BELT WARNING LAMP OPERATION Turn ignition switch ON. Buckle and unbuckle the driver seat belt while watching seat belt warning lamp. When seat belt is fastened: Warning lamp OFF When seat belt is unfastened: Warning lamp ON OK or NG OK: Replace the BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-272372-S08280128112007111800000) ". NG: GO TO 3.
  3. CHECK COMBINATION METER INPUT SIGNAL Turn ignition switch ON. Check voltage between combination meter harness connector M24 terminal 24 and ground. CONNECTOR TERMINAL VOLTAGE REFERENCE Terminals Condition Voltage (V) (Approx.) (+) (-) Connector Terminal M24 24 Ground Seat belt is fastened Battery voltage Seat belt is unfastened 0V (Scheme 47): Checking Voltage Between Combination Meter Harness Connector M24 Terminal 24 And Ground OK or NG OK: Replace the combination meter. Refer to " «COMBINATION METER»(ref-272364-S06033080672007111800000) ". NG: GO TO 4.
  4. CHECK SEAT BELT BUCKLE SWITCH Turn ignition switch OFF. Disconnect seat belt buckle switch LH connector B12. Check continuity between seat belt buckle switch LH terminals 1 and 2. CONNECTOR TERMINAL CONTINUITY REFERENCE Terminals Condition Continuity 1 2 Seat belt is fastened No Seat belt is unfastened Yes OK or NG OK: GO TO 5. NG: Replace the seat belt buckle switch LH. (Scheme 48): Checking Continuity Between Seat Belt Buckle Switch LH Terminals 1 And 2
  5. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT Disconnect combination meter connector. Check continuity between combination meter harness connector M24 terminal 24 and seat belt buckle switch LH harness connector B12 terminal 1. Continuity should exist. Check continuity between combination meter harness connector M24 terminal 24 and ground. Continuity should not exist. OK or NG OK: Check seat belt buckle switch ground circuit. NG: Repair harness or connector. (Scheme 49): Checking Continuity Between Combination Meter Harness Connector M24 Terminal 24 And Ground

The board computer can indicate the following items.

  1. DTE (distance to empty)
  2. Trip distance
  3. Trip time
  4. Average fuel consumption
  5. Average vehicle speed

DTE (DISTANCE TO EMPTY) INDICATION

The range indication provides the driver with an estimation of the distance that can be driven before refueling. The range is calculated by signals from the fuel level sensor unit (fuel remaining), ECM (fuel consumption) and the ABS actuator and electric unit (vehicle speed). The indication will be refreshed every 30 seconds. When fuel remaining is less than approximately 11.6 l (3 1/8 US gal, 2 1/2 Imp gal), the indication will blink as a warning. If the fuel remaining is less than approximately 9.6 l (2 1/2 US gal, 2 1/8 Imp gal), the indication will show "-". In this case, the display will change to the DTE mode even though the display is showing a different mode. When the battery is disconnected and reconnected, DTE mode will display "-" until the vehicle is driven 0.3 miles (0.5 km).

TRIP DISTANCE

Trip distance is calculated by signal from the ABS actuator and electric unit (vehicle speed). If trip distance is reset, trip time will be reset at the same time.

TRIP TIME

Trip time displays cumulative ignition switch ON time. If trip time is reset, trip distance will be reset at the same time.

AVERAGE FUEL CONSUMPTION

Average fuel consumption indication is calculated by signals from the ABS actuator and electric unit (vehicle speed) and the ECM (fuel consumption). The indication will be refreshed every 30 seconds.

AVERAGE VEHICLE SPEED

Average vehicle speed indication is calculated by running distance and running time. The indication will be refreshed every 30 seconds. If average vehicle speed is reset, average fuel consumption will be reset at the same time. After resetting, the display will show "-" for 30 seconds.

SEGMENT CHECK

The board computer segment display can be checked by entering combination meter self-diagnostic mode. Refer to " SELF-DIAGNOSIS FUNCTION ".

Trouble Diagnoses Flow Chart. Scheme 51

Scheme 51: Trouble Diagnoses Flow Chart
  1. «DIAGNOSIS PROCEDURE»(ref-272357-S09025901082007111800000)
  2. «PRELIMINARY CHECK»(ref-272357-S28466223472007111800000)