2004 NISSAN TERRANO check engine light

On board diagnostic system function
The on board diagnostic system has the following three functions.
Diagnostic Test Mode KEY and ENG. StatusFunctionExplanation of Function
Mode I Ignition switch in ON
position
Engine stopped
BULB CHECK This function checks the MI bulb for damage
(blown, open circuit, etc.).
If the MI does not come on, check MI circuit.
(See EC-310.)
Engine running
MALFUNCTION
WARNING This is a usual driving condition. When ECM
detects a malfunction, the MI will light up to
inform the driver that a malfunction has been
detected.
Mode II Ignition switch in ON position
Engine stopped
SELF-DIAGNOSTIC RESULTS This function allows DTCs to be read.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONZD30DDTi
Malfunction Indicator (MI) (Cont'd)
EC-35
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Description
The accelerator switch is installed to the accelerator pedal assem-
bly. The switch senses accelerator position and sends an ON-OFF
signal to the ECM. The ECM uses the signal to control the fuel cut
operation at deceleration for better fuel efficiency.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEMCONDITION SPECIFICATION
ACCEL SW (FC) I
Ignition switch: ON
(Engine stopped) Accelerator pedal: fully released CLOSE
Accelerator pedal: slightly open OPEN
DECELER F/CUT IEngine: After warming up Idle OFF
ECM Terminals and Reference Value
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 damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
29 LG/R Accelerator switch (F/C) Ignition switch ªONº
Accelerator pedal fully released
BATTERY VOLTAGE
(11 - 14V)
Ignition switch ªONº
Accelerator pedal depressed Approximately 0V
On Board Diagnosis Logic
Malfunction is detected when ....
Check Items (Possible Cause)
I The OFF signal (short) is sent to the ECM for a certain period
of time even when the accelerator pedal is not being
depressed. I
Harness or connectors
(The switch circuit is shorted.)
I Accelerator switch (F/C)
MEC986D
DTC 0203 ACCEL POS SW (F/C)ZD30DDTi
EC-104
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IWhen connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.
I Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to IC's.
I Keep engine control system harness at least 10cm (4 in)
away from adjacent harness, to prevent engine control
system malfunctions due to receiving external noise,
degraded operation of IC's, etc.
I Keep engine control system parts and harness dry.
I Before replacing ECM, perform Terminals and Reference
Value inspection and make sure ECM functions properly.
I After performing each TROUBLE DIAGNOSIS, perform
ªDTC Confirmation Procedureº or ªOverall Function
Checkº.
The DTC should not be displayed in the ªDTC Confirmation
Procedureº if the repair is completed. The ªOverall Func-
tion Checkº should be a good result if the repair is com-
pleted.
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
I Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM's transistor. Use a ground other than ECM terminals,
such as the ground.
I Do not disconnect supply pump harness connector with
engine running.
I Do not disassemble fuel pump.
If NG, take proper action.
I Do not disassemble fuel injector.
If NG, replace fuel injector.
I Even a slight leak in the air intake system can cause seri-
ous problems.
I Do not shock or jar the crankshaft position sensor and the
camshaft position sensor.
SEF291H
MEF040D
SEF348N
PRECAUTIONS AND PREPARATIONTD27Ti
Precautions (Cont'd)
EC-316
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How to Erase DTC (Without CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least5 seconds and then turn it ªONº (engine stopped) again.
2. Change the diagnostic test mode from Mode II to Mode I by using the data link connector. (See EC-346.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode.
I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
I Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
Malfunction Indicator (MI)
1. The malfunction indicator will light up when the ignition switch
is turned ON without the engine running. This is a bulb check.
I If the malfunction indicator does not light up, refer to EL sec-
tion (ªWARNING LAMPS/WIRING DIAGRAMº) or see MI &
DATA LINK CONNECTORS.
2. When the engine is started, the malfunction indicator should go off.
If the lamp remains on, the on board diagnostic system has
detected an engine system malfunction.
If MI illuminates or flashes irregularly after starting engine,
water may have accumulated in fuel filter. Drain water from
fuel filter.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
Diagnostic
Test Mode KEY and ENG.
Status Function Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK
This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit. (See EC-475.)
Engine running
MALFUNCTION
WARNING This is a usual driving condition. When ECM detects a
malfunction, the MI will light up to inform the driver that a mal-
function has been detected.
Mode II Ignition switch in
ON position
Engine stopped
SELF-DIAGNOSTIC
RESULTS
This function allows DTCs to be read.
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONTD27Ti
Diagnostic Trouble Code (DTC) (Cont'd)
EC-345
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Component Description
Malfunction Indicator (MI) is located on the instrument panel. When the ignition switch is turned ON without
engine running, MI will light up. This is a bulb check. When the engine is started, MI should go off. If MI remains
on, the on board diagnostic system has detected an engine system malfunction.
On Board Diagnosis Logic
DTC No.Trouble diagnosis name DTC detecting condition Possible cause
P0650
0907 Malfunction indicator (MI) control cir-
cuit I
An excessively high voltage is sent
to ECM through the MI circuit
under the condition that calls for MI
light up.
I An excessively low voltage is sent
to ECM through the MI circuit
under the condition that calls for MI
not to light up. I
Harness or connectors
(MI circuit is open or shorted.)
I MI
DTC Confirmation Procedure
NOTE:
If ªDTC Confirmation Procedureº has been previously
conducted, always turn ignition switch ªOFFº and wait at least
10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªDATA MONITORº mode with CONSULT-II.
3. Start engine and let it idle for 2 second.
WITHOUT CONSULT-II
1. Turn ignition switch ªONº.
2. Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
3. Start engine and let it idle for 2 second.
4. Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
SEF817Y
DTC P0650 MITD27Ti
EC-427
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Removal and Installation
CAUTION:
The accelerator wire should be adjusted when removing and replacing any parts of the accelerator
control system, shown in the illustration.
a. Warm up engine to normal operating temperature. Then stop it.
b. Check to see if throttle valve fully opens when accelerator pedal is fully depressed and if it returnsto idle position when released.
c. Adjust accelerator pedal free play by turning adjusting nut.
d. Check accelerator control parts for improper contact with any adjacent parts.
e. When connecting accelerator wire, be careful not to twist or scratch its inner wire.
f. Apply a light coat of recommended multi-purpose grease to all sliding or friction surfaces. Do not apply grease to wire.
g. For ASCD wire adjustment, refer to ªASCD Wire Adjustmentº in EL section.
INSPECTION AFTER INSTALLATION
I Check if accelerator pedal moves smoothly within its range.
I Check if accelerator pedal returns securely to its original position.
I Perform ªAccelerator Pedal Released Position Learningº when removing the accelerator pedal position
sensor harness connector. Refer to ªBASIC SERVICE PROCEDUREº in EC section for instructions.
YFE019
ACCELERATOR CONTROL SYSTEMZD30DDTi
FE-2
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Diagnosis by CONSULT-II
NOTICE
1. The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of eachsolenoid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Manual may differ slightly. This occurs because of the following reasons:
IActual shift schedule has more or less tolerance or allowance,
I Shift schedule indicated in Service Manual refers to the point where shifts start. Gear position displayed
on CONSULT-II indicates the point where shifts are completed.
3. Shift solenoid valve ªAº or ªBº is displayed on CONSULT-II at the start of shifting. Gear position is displayed upon completion of shifting (which is computed by TCM).
4. Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II unit.
SELF-DIAGNOSTIC RESULT TEST MODE
Refer to AT-14.
DATA MONITOR DIAGNOSTIC TEST MODE
Item DisplayMonitor item
Description Remarks
ECU
input
signals Main
signals
Vehicle speed sensor 1
(A/T)
(Revolution sensor) VHCL/S SE×A/T
[km/h] or [mph]
XÐI
Vehicle speed computed from signal
of revolution sensor is displayed. When racing engine in ªNº or ªPº posi-
tion with vehicle stationary, CON-
SULT-II data may not indicate
0 km/h (0 MPH).
Vehicle speed sensor 2
(Meter) VHCL/S SE×MTR
[km/h] or [mph]
XÐI
Vehicle speed computed from signal
of vehicle speed sensor is dis-
played. Vehicle speed display may not be
accurate under approx. 10 km/h
(6 MPH). It may not indicate 0 km/h (0
MPH) when vehicle is stationary.
Throttle (accelerator)
position sensor THRTL POS SEN
[V]
XÐI
Throttle (accelerator) position sen-
sor signal voltage is displayed.
A/T fluid temperature
sensor FLUID TEMP SE
[V]
XÐI
A/T fluid temperature sensor signal
voltage is displayed.
I Signal voltage lowers as fluid tem-
perature rises.
Battery voltage BATTERY VOLT [V]XÐI
Source voltage of TCM is displayed.
Engine speed ENGINE SPEED [rpm]XXI
Engine speed, computed from
engine speed signal, is displayed. Engine speed display may not be
accurate under approx. 800 rpm. It
may not indicate 0 rpm even when
engine is not running.
Overdrive control switch OVERDRIVE SW [ON/OFF]XÐI
ON/OFF state computed from signal
of overdrive control SW is displayed.
P/N position switch P/N POSI SW [ON/OFF]XÐI
ON/OFF state computed from signal
of P/N position SW is displayed.
R position switch R POSITION SW [ON/OFF]XÐI
ON/OFF state computed from signal
of R position SW is displayed.
D position switch D POSITION SW [ON/OFF]XÐI
ON/OFF state computed from signal
of D position SW is displayed.
2 position switch 2 POSITION SW [ON/OFF]XÐI
ON/OFF status, computed from sig-
nal of 2 position SW, is displayed.
1 position switch 1 POSITION SW [ON/OFF]XÐI
ON/OFF status, computed from sig-
nal of 1 position SW, is displayed.
ASCD-cruise signal ASCD×CRUISE [ON/OFF]XÐI
Status of ASCD cruise signal is dis-
played.
ON ... Cruising state
OFF ... Normal running state I
This is displayed even when no
ASCD is mounted.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-20
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DIAGNOSTIC WORKSHEET
1.lRead the Fail-safe and listen to customer complaints. AT-5
2. lA/T FLUID CHECK AT-27
l Leakage (Follow specified procedure)
l Fluid condition
l Fluid level
3. lPerform STALL TEST and LINE PRESSURE TEST. AT-27,
AT-30
l Stall test Ð Mark possible damaged components/others.
l Torque converter one-way clutch
l Reverse clutch
l Forward clutch
l Overrun clutch
l Forward one-way clutch l
Low & reverse brake
l Low one-way clutch
l Engine
l Line pressure is low
l Clutches and brakes except high
clutch and brake band are OK
l Line pressure test Ð Suspected parts:
4. lPerform all ROAD TEST and mark required procedures. AT-32
4-1. Check before engine is started. AT-33 l SELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
l Vehicle speed sensor×A/T (Revolution sensor), AT-52.
l Vehicle speed sensor×MTR, AT-56.
l Throttle (accelerator) position sensor, AT-62.
l Shift solenoid valve A, AT-65.
l Shift solenoid valve B, AT-68.
l Overrun clutch solenoid valve, AT-71.
l Torque converter clutch solenoid valve, AT-93.
l A/T fluid temperature sensor and TCM power source, AT-78.
l Engine speed signal, AT-82.
l Line pressure solenoid valve, AT-86.
l Park/neutral position, overdrive control, A/T check and throttle
(accelerator) position switches, AT-93.
l Battery
l Others
4-2. Check at idle AT-35 l 1. SPORT Indicator Lamp Does Not Come On, AT-97.
l 2. SPORT or SNOW Indicator Lamp Does Not Come On, AT-100.
l 3. O/D OFF Indicator Lamp Does Not Come On, AT-100.
l 4. SPORT Indicator Lamp Does Not Come On, AT-101.
l 5. Engine Cannot Be Started In ªPº And ªNº Position, AT-102.
l 6. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed,
AT-102.
l 7. In ªNº Position, Vehicle Moves, AT-103.
l 8. Large Shock. ªNº ,ªRº Position, AT-104.
l 9. Vehicle Does Not Creep Backward In ªRº Position, AT-105.
l 10. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position, AT-106.
4-3. Cruise test AT-36,
AT-39
Part-1
l 11. Vehicle Cannot Be Started From D
1, AT-107.
l 12. A/T Does Not Shift: D
1,D2Or Does Not Kickdown: D4,D2, AT-108.
l 13. A/T Does Not Shift: D
2,D3, AT-109.
l 14. A/T Does Not Shift: D
3,D4, AT-110.
l 15. A/T Does Not Perform Lock-up, AT-111.
l 16. A/T Does Not Hold Lock-up Condition, AT-112.
l 17. Lock-up Is Not Released, AT-112.
l 18. Engine Speed Does Not Return To Idle (Light Braking D
4,D3), AT-113.
TROUBLE DIAGNOSIS Ð Introduction
Diagnostic Worksheet (Cont'd)
AT-24
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