2001 NISSAN PICK-UP air condition

CONSULT-II Reference Value in Data Monitor
Mode
Remarks:
+Specification data are reference values.
+Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
MONITOR ITEM CONDITION SPECIFICATION
CKPSzRPM (TDC)
+Tachometer: Connect
+Run engine and compare tachometer indication with the CONSULT-II value.Almost the same speed as the
CONSULT-II value.
CMPSzRPM-PUMP
COOLAN TEMP/S+Engine: After warming up More than 80ÉC (176ÉF)
VHCL SPEED SE+Turn drive wheels and compare speedometer indication with the CONSULT-II valueAlmost the same speed as the
CONSULT-II value
FUEL TEMP SEN+Engine: After warming up More than 40ÉC (104ÉF)
ACCEL POS SEN+Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.29 - 0.79V
Accelerator pedal: fully depressed Approx. 3.48 - 4.64V
FULL ACCEL SW+Ignition switch: ON
(Engine stopped)Accelerator pedal: fully depressed ON
Except above OFF
OFF ACCEL SW+Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released ON
Accelerator pedal: slightly open OFF
SPILL/V+Engine: After warming up Idle speed Approx. 13ÉCA
BATTERY VOLT+Ignition switch: ON (Engine stopped) 11 - 14V
I/C INT/A T/S+Ignition switch: ONIntake air temperature
Approx. 0ÉC: Approx. 4.2V
Approx. 20ÉC: Approx. 3.5V
P/N POSI SW+Ignition switch: ONShift lever: Park/Neutral ON
Except above OFF
START SIGNAL+Ignition switch: ON®START®ON OFF®ON®OFF
AIR COND SIG+Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
BRAKE SW+Ignition switch: ONBrake pedal: depressed ON
Brake pedal: released OFF
BRAKE SW2+Ignition switch: ONBrake pedal: depressed ON
Brake pedal: released OFF
IGN SW+Ignition switch: ON®OFF ON®OFF
WARM UP SW+Ignition switch: ONHeat up switch: ON ON
Heat up switch: OFF OFF
TURBO BST SEN+Engine: After warming up
+Shift lever: Neutral positionIdle speed Approx. Atmospheric pressure
Engine speed is 2,000 rpm Apporx. 106.0 kPa
DECELER F/CUT+Engine: After warming up Idle speed OFF
INJ TIMG C/V+Engine: After warming up, idle the engine. Approx. 50 - 70%
AIR COND RLY+Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
GLOW RLY+Refer to EC-3622.
COOLING FAN+When cooling fan is stopped. OFF
+When cooling fan operates. ON
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD25DDTi
EC-3460

MONITOR ITEM CONDITION SPECIFICATION
EGR VOL CON/V+Engine: After warming up
+Air conditioner switch: ªOFFº
+Shift lever: Neutral position
+No-loadAfter 1 minute of idling More than 10 steps
Revving engine from idle to 3,200 rpm 0 step
BARO SEN+Ignition switch: ONAltitude
Approx.0m(0ft): Approx. 100.62
kPa (1.0062 bar, 1.026 kg/cm
2,
14.59 psi)
Approx. 1,000 m (3,281 ft): Approx.
88.95 kPa (0.8895 bar, 0.907
kg/cm
2, 12.90 psi)
Approx. 1,500 m (4,922 ft): Approx.
83.16 kPa (0.8316 bar, 0.848
kg/cm
2, 12.06 psi)
Approx. 2,000 m (6,562 ft): Approx.
78.36 kPa (0.7836 bar, 0.799
kg/cm
2, 11.36 psi)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD25DDTi
CONSULT-II Reference Value in Data Monitor
Mode (Cont'd)
EC-3461

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
15 G/W Air conditioner relayEngine is running.
Air conditioner switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
Engine is running.
Both air conditioner switch and blower fan
switch are ªONº
(Compressor is operating)Approximately 0.1V
16 L/W Glow lampIgnition switch ªONº
Glow lamp is ªONºApproximately 1V
Ignition switch ªONº
Glow lamp is ªOFFºBATTERY VOLTAGE
(11 - 14V)
17 G/Y Stop lamp switchIgnition switch ªONº
Brake pedal fully releasedApproximately 0V
Ignition switch ªONº
Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
18 W/GMalfunction indicator
lampIgnition switch ªONº
Approximately 1V
Engine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
19 L/OREngine coolant tempera-
ture sensorEngine is running.
Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature
20 R Start signalIgnition switch ªONº
Approximately 0V
Ignition switch ªSTARTº
BATTERY VOLTAGE
(11 - 14V)
21 Y Air conditioner switchEngine is running.
Air conditioner switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
Engine is running.
Both air conditioner switch and blower fan
switch are ªONº
(Compressor is operating)Approximately 0V
22 G/ORPark/Neutral position
switchIgnition switch ªONº
Gear position is ªNeutralºApproximately 0V
Ignition switch ªONº
Except the above gear positionBATTERY VOLTAGE
(11 - 14V)
23 WAccelerator position sen-
sorIgnition switch ªONº
Accelerator pedal fully released0.29 - 0.79V
Ignition switch ªONº
Accelerator pedal fully depressed3.48 - 4.64V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD25DDTi
ECM Terminals and Reference Value
(Cont'd)
EC-3465

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
26 W/L Vehicle speed sensorEngine is running.
Lift up the vehicle
In 1st gear position
Vehicle speed is 10 km/h (6 MPH)0 - Approximately 4.6V
SEF257Z
Engine is running.
Lift up the vehicle
In 2nd gear position
Vehicle speed is 30 km/h (19 MPH)Approximately 2.2V
SEF258Z
29 BR/RBrake pedal position
switchIgnition switch ªONºBrake pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
Ignition switch ªONº
Brake pedal depressedApproximately 0V
31 YAccelerator position
switch (Idle)Ignition switch ªONº
Accelerator pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
Ignition switch ªONº
Accelerator pedal depressedApproximately 0V
32 GAccelerator position
switch (Full)Ignition switch ªONº
Accelerator pedal releasedApproximately 0V
Ignition switch ªONº
Accelerator pedal fully depressedBATTERY VOLTAGE
(11 - 14V)
33 G/YElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.4V
36 P/BIntake air temperature
sensorEngine is running.
Idle speedApproximately 0 - 4.8V
Output voltage varies with
intake air temperature.
38 W/R Ignition switchIgnition switch ªOFFº
0V
Ignition switch ªONº
BATTERY VOLTAGE
(11 - 14V)
39
43B/W
B/WECM groundEngine is running.
Idle speedApproximately 0V
40 PUElectronic control fuel
injection pumpEngine is running.
Warm-up condition
Idle speedApproximately 2.4V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD25DDTi
ECM Terminals and Reference Value
(Cont'd)
EC-3466

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
42 G/R
Data link connectorEngine is running.
Idle speed (CONSULT-II is connected and
turned on)Approximately 0V
64 G/BApproximately 0.2V
65 GY/LLess than 9V
44 YCrankshaft position sen-
sor (TDC)Engine is running.
Warm-up condition
Idle speedApproximately 0.04V
SEF333Y
Engine is running.
Warm-up condition
Engine speed is 2,000 rpmApproximately 0.04V
SEF334Y
46 P/LCharge air pressure sen-
sorEngine is running.Warm-up condition
Idle speedApproximately 2.7V
47 BRCrankshaft position sen-
sor (TDC) groundEngine is running.
Warm-up condition
Idle speedApproximately 0V
48 OR/LAccelerator position sen-
sor power supplyIgnition switch ªONº
Approximately 5V
49 W Sensor's power supplyIgnition switch ªONº
Approximately 5V
50 B Sensors' groundEngine is running.
Warm-up condition
Idle speedApproximately 0V
51 B/WAccelerator position sen-
sor groundEngine is running.
Warm-up condition
Idle speedApproximately 0V
52 L/WElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.1V
53 L/RElectronic control fuel
injection pumpEngine is running.
Idle speedApproximately 0.45V
Engine is running.
Engine speed is 2,000 rpmApproximately 0.7V
56
61R
RPower supply for ECM Ignition switch ªONº
BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD25DDTi
ECM Terminals and Reference Value
(Cont'd)
EC-3467

Description
Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er's complaint often do not recur on DTC visits. Realize also that the most frequent cause of I/I occurrences
is poor electrical connections. Because of this, the conditions under which the incident occurred may not be
clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the
specific problem area.
COMMON I/I REPORT SITUATIONS
STEP in Work Flow Situation
II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than ª0º.
III The symptom described by the customer does not recur.
IV DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for XXXX does not indicate the problem area.
Diagnostic Procedure
1 INSPECTION START
Erase DTCs. Refer to ªHOW TO ERASE DTCº, EC-3428.
cGO TO 2.
2 CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to GI section (ªGROUND INSPECTIONº, ªCircuit Inspectionº).
OK or NG
OKcGO TO 3.
NGcRepair or replace.
3 SEARCH FOR ELECTRICAL INCIDENT
Perform GI section, ªIncident Simulation Testsº.
OK or NG
OKcINSPECTION END
NGcRepair or replace.
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTYD25DDTi
EC-3469

Description
SYSTEM DESCRIPTION
Sensor Input signal to ECM ECM function Actuator
Vehicle speed sensor Vehicle speed
Cooling fan con-
trolCooling fan relay Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch Air conditioner ªONº signal
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature. The
control system has 2-step control [ON/OFF].
OPERATION
*: Refer to HA section.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
AIR COND RLY+Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
COOLING FAN+When cooling fan is stopped. OFF
+When cooling fan operates. ON
SEC242D
DTC 0208 OVER HEATYD25DDTi
EC-3489

17 CHECK ACCELERATOR POSITION SWITCH INPUT SIGNAL CIRCUIT-I FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between accelerator work unit terminal 6 and ECM terminal 31. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 19.
NGcGO TO 18.
18 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M47, F55 (RHD models)
+Harness for open or short between ECM and accelerator work unit
cRepair open circuit or short to ground or short to power in harness or connectors.
19 CHECK ACCELERATOR POSITION SWITCH INPUT SIGNAL CIRCUIT-II FOR OPEN AND SHORT
1. Check harness continuity between accelerator work unit terminal 4 and ECM terminal 32. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 21.
NGcGO TO 20.
20 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors M47, F55 (RHD models)
+Harness for open or short between ECM and accelerator work unit
cRepair open circuit or short to ground or short to power in harness or connectors.
21 CHECK ACCELERATOR POSITION SWITCH
Check continuity between accelerator work unit terminals 4 and 5, 5 and 6 under the following conditions.
SEC246D
OK or NG
OK (With CONSULT-II)cGO TO 22.
OK (Without CONSULT-II)cGO TO 23.
NGcReplace accelerator pedal assembly.
DTC 0403 ACCEL POS SENSORYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3529