2003 NISSAN ALMERA N16 relay

EC-466
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-468
.
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TEST DTC*1FREEZE
FRAME
DATA
*2
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)××××
Camshaft position sensor (PHASE)×××
Mass air flow sensor×××
Engine coolant temperature sensor×××××
Heated oxygen sensor 1×××
Heated oxygen sensor 2×××
Vehicle speed signal×××
Accelerator pedal position sensor×××
Throttle position sensor×××
Intake air temperature sensor××
Knock sensor×
Refrigerant pressure sensor××
Closed throttle position switch (accelerator
pedal position sensor signal)××
Air conditioner switch××
Park/neutral position (PNP) switch××
Stop lamp switch×××
Power steering pressure sensor××
Battery voltage××
Electrical load signal××
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Injectors×× ×
Power transistor (Ignition timing)×× ×
Throttle control motor relay×××
Throttle control motor×
EVAP canister purge volume control sole-
noid valve×× ×
Air conditioner relay××
Fuel pump relay××××
Cooling fan relay××××
Heated oxygen sensor 1 heater××
Heated oxygen sensor 2 heater××
Intake valve timing control solenoid valve×× ×
Calculated load value×××

TROUBLE DIAGNOSIS
EC-471
[QG (WITHOUT EURO-OBD)]
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PURG VOL C/V
[%]
●Indicates the EVAP canister purge vol-
ume control solenoid valve control value
computed by the ECM according to the
input signals.
●The opening becomes larger as the
value increases.
INT/V TIM (B1)
[°CA]
●Indicates [°CA] of intake camshaft
advanced angle.
INT/V SOL (B1) [%]
●The control condition of the intake valve
timing control solenoid valve (deter-
mined by ECM according to the input
signals) is indicated.
ON ... intake valve timing control is oper-
ating.
OFF ... Intake valve timing control is not
operating.
AIR COND RLY
[ON/OFF]×
●The air conditioner relay control condi-
tion (determined by ECM according to
the input signals) is indicated.
FUEL PUMP RLY
[ON/OFF]×
●Indicates the fuel pump relay control
condition determined by ECM according
to the input signals.
THRTL RELAY
[ON/OFF]×
●Indicates the throttle control motor relay
control condition determined by the
ECM according to the input signals.
COOLING FAN
[ON/OFF]
●Indicates the condition of the cooling fan
(determined by ECM according to the
input signals).
ON ... Operation
OFF ... Stop
HO2S1 HTR (B1)
[ON/OFF]
●Indicates [ON/OFF] condition of heated
oxygen sensor 1 heater determined by
ECM according to the input signals.
HO2S2 HTR (B1)
[ON/OFF]
●Indicates [ON/OFF] condition of heated
oxygen sensor 2 heater determined by
ECM according to the input signals.
VEHICLE SPEED
[km/h] or [mph]×
●The vehicle speed computed from the
vehicle speed signal sent from TCM is
displayed.
IDL A/V LEARN
[YET/CMPLT]
●Display the condition of idle air volume
learning
YET ... Idle air volume learning has not
been performed yet.
CMPLT ... Idle air volume learning has
already been performed successfully.
TRVL AFTER MIL
[km] or [mile]
●Distance traveled while MI is activated.
O2SEN HTR DTY
[%]
●Indicates the heated oxygen sensor 1
heater control value computed by the
ECM according to the input signals.
AC PRESS SEN
[V]×
●The signal voltage from the refrigerant
pressure sensor is displayed. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks

TROUBLE DIAGNOSIS
EC-473
[QG (WITHOUT EURO-OBD)]
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ACTIVE TEST MODE
Test Item
*: Leaving cooling fan ″OFF″ with CONSULT-II while engine is running may cause the engine to overheat.
REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description
CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR”
mode.
1. “AUTO TRIG” (Automatic trigger):
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION
●Engine: Return to the original
trouble condition
●Change the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
●Harness and connectors
●Fuel injectors
●Heated oxygen sensor 1
IGNITION TIM-
ING
●Engine: Return to the original
trouble condition
●Timing light: Set
●Retard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
●Perform “Idle Air Volume Learn-
ing”.
POWER BAL-
ANCE
●Engine: After warming up, idle
the engine.
●A/C switch “OFF”
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Cut off each injector signal one at
a time using CONSULT-II.Engine runs rough or dies.
●Harness and connectors
●Compression
●Fuel injectors
●Power transistor
●Spark plugs
●Ignition coils
COOLING FAN*
●Ignition switch: ON
●Turn the cooling fan “ON” and
“OFF” with CONSULT-II.Cooling fan moves and stops.
●Harness and connectors
●Cooling fan relay
●Cooling fan motor
ENG COOLANT
TEMP
●Engine: Return to the original
trouble condition
●Change the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
●Harness and connectors
●Engine coolant temperature sen-
sor
●Fuel injectors
FUEL PUMP
RELAY
●Ignition switch: ON (Engine
stopped)
●Turn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen to operating sound.Fuel pump relay makes the operat-
ing sound.●Harness and connectors
●Fuel pump relay
PURG VOL
CONT/V
●Engine: After warming up, run
engine at 1,500 rpm.
●Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.Engine speed changes according to
the opening percent.●Harness and connectors
●Solenoid valve
V/T ASSIGN
ANGLE
●Engine: Return to the original
trouble condition
●Change intake valve timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
●Harness and connectors
●Intake valve timing control sole-
noid valve

EC-478
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.INT/V SOL (B1)
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 60%
AIR COND RLY
●Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY
●For 1 seconds after turning ignition switch ON
●Engine running or crankingON
●Except above conditions OFF
THRTL RELAY
●Ignition switch: ON ON
COOLING FAN
●Engine: After warming up, idle
the engine
●Air conditioner switch: OFFEngine coolant temperature is 99°C
(210°F) or lessOFF
Engine coolant temperature is 100°C
(212°F) or moreON
HO2S1 HTR (B1)
●Engine: After warming up
●Engine speed: Below 3,600 rpm (M/T models)
Below 3,200 rpm (A/T models)ON
●Engine speed: Above 3,600 rpm (M/T models)
Above 3,200 rpm (A/T models)OFF
HO2S2 HTR (B1)
●Engine speed: Below 3,800 rpm after the following conditions are met.
●Engine: After warming up
●Keeping the engine speed between 3,500 and 4,000 rpm for one minute
and at idle for one minute under no loadON
●Engine speed: Above 3,800 rpm OFF
TRVL AFTER MIL
●Ignition switch: ONVehicle has traveled after MI has
turned ON.0 - 65,280 km
(0 - 40,565 mile)
O2SEN HTR DTY
●Engine coolant temperature when engine started: More than 80° (176°F)
●Engine speed: Below 3,600 rpm (M/T models)
Below 3,200 rpm (A/T models)Approx. 50%
AC PRESS SEN
●Ignition switch: ON (Engine stopped) Approx. 0V
●Engine: Idle
●Air conditioner switch: OFF1.0 - 4.0V
VEH SPEED SE
●Turn drive wheels and compare speedometer indication with the CON-
SULT-II value.Almost the same speed as the
CONSULT-II value
CAN COMM
●Ignition switch: ONOK
CAN CIRC 1OK
CAN CIRC 2OK or UNKWN
CAN CIRC 3UNKWN
CAN CIRC 4OK
CAN CIRC 5UNKWN
CAN CIRC 6OK
CAN CIRC 7UNKWN MONITOR ITEM CONDITION SPECIFICATION

POWER SUPPLY CIRCUIT FOR ECM
EC-487
[QG (WITHOUT EURO-OBD)]
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS00KFA
1.INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Ye s > > G O T O 1 0 .
No >> GO TO 2.
2.CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 109 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1 B ECM ground[Engine is running]
●Idle speedEngine ground
109 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
111 W / GECM relay
(Self shut-off)[Engine is running]
[Ignition switch “OFF”]
●For a few seconds after turning ignition switch
“OFF”0 - 1.0V
[Ignition switch “OFF”]
●More than a few seconds passed after turning
ignition switch “OFF”BATTERY VOLTAGE
(11 - 14V)
11 5
11 6B
BECM ground[Engine is running]
●Idle speedEngine ground
11 9
120W
WPower supply for
ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0015E

EC-488
[QG (WITHOUT EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
3. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 1, 115, 116 and engine ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or connectors.
5. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1 and 6 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.Continuity should exist.
MBIB0247E
Voltage: Battery voltage
SEF420X

POWER SUPPLY CIRCUIT FOR ECM
EC-489
[QG (WITHOUT EURO-OBD)]
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6.DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●15A fuse
●Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 111 and ECM relay terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between ECM and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK ECM RELAY
Refer to EC-491, "
Component Inspection" .
OK or NG
OK >> GO TO EC-660, "IGNITION SIGNAL" .
NG >> Replace ECM relay.
10.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Stop engine and wait at least 10 seconds.
2. Turn ignition switch “ON” and then “OFF”.
3. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 14.
NG (Battery voltage does not exist.)>>GO TO 11.
NG (Battery voltage exists for more than a few seconds.)>>GO TO 12. Continuity should exist.
Voltage: After turning ignition switch “OFF”, battery
voltage will exist for a few seconds, then
drop approximately 0V.
MBIB0016E

EC-490
[QG (WITHOUT EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
11 . CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminal 3 (LHD models) or 5
(RHD models) and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
12. CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 119, 120 and ECM relay terminal 5 (LHD models) or 3
(RHD models).
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> GO TO 13.
13. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between ECM and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK ECM RELAY
Refer to EC-491, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace ECM relay.
MBIB0247E
Voltage: Battery voltage
MBIB0263E
Continuity should exist.