NISSAN TERRANO 2004 Service Repair Manual

8 CHECK SHIELD CIRCUIT
1. Disconnect charge air pressure sensor sub-harness connectors E225, F108 and ECM harness connector.
2. Check continuity between boost sensor sub-harness connector terminal 15 and ground.Continuity should exist.
3. Check continuity between ECM terminal 43 and ground. Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK EGO TO 10.
NG EGO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E225, F108
I Harness connectors F135, M842 (RHD models)
I Harness for open or short between charge air pressure sensor and ground
I Harness for open or short between ECM and ground
E
10 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-78. EINSPECTION END
DTC 0905 TURBO PRESSUREZD30DDTi
Diagnostic Procedure (Cont'd)
EC-226
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Description
SYSTEM DESCRIPTION
SensorInput Signal to ECMECM FunctionActuator
Electronic controlled fuel injection pump Fuel injection signal
EGR volume
controlEGR volume control valve
Crankshaft position sensor (TDC) Engine speed
Vehicle speed sensor
Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Throttle position sensor Throttle position
Battery Battery voltage
Mass air flow sensor Amount of intake air
Air conditioner switch Air conditioner operation
Electrical load Electrical load signal
PNP switch Park/Neutral position signal
This system controls flow rate of EGR led from exhaust manifold
to intake manifold. The opening of the EGR by-pass passage in the
EGR volume control valve changes to control the flow rate. A
built-in step motor moves the valve in steps corresponding to the
ECM output pulses. The opening of the valve varies for optimum
engine control. The optimum value stored in the ECM is determined
by considering various engine conditions.
The EGR volume control valve remains close under the following
conditions.
IEngine stopped
I Engine starting
I Low engine coolant temperature
I Excessively high engine coolant temperature
I High engine speed
I Wide open throttle
I Low battery voltage
COMPONENT DESCRIPTION
EGR volume control valve
The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the
ECM. Two windings are turned ON and OFF in sequence. Each
time an ON pulse is issued, the valve opens or closes, changing
the flow rate. When no change in the flow rate is needed, the ECM
does not issue the pulse signal. A certain voltage signal is issued
so that the valve remains at that particular opening.
SEF908Y
SEF411Y
DTC 1003 EGR VOLUME CONT/VZD30DDTi
EC-227
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CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEMCONDITION SPECIFICATION
EGR VOL CON/V I
Engine: After warming up
I Air conditioner switch: ªOFFº
I Shift lever: Neutral position
I No-load After 1 minute at idle More than 10 steps
Revving engine up to 3,200 rpm
quickly
0 step
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)
103 R/Y (LHD
mod-
els)
L/R
(RHD
mod-
els) EGR volume control valve
Engine is running.
Warm-up condition
Idle speed 0.1 - 14V
105
109 11 5 G/Y
Y/B
R/L
On Board Diagnosis Logic
DTC No.
Malfunction is detected when ... Check Items (Possible Cause)
1003 IAn excessively low voltage signal is sent to ECM. IHarness or connectors
(The EGR volume control valve circuit is open or
shorted.)
I EGR volume control valve
DTC 1003 EGR VOLUME CONT/VZD30DDTi
EC-228
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DTC Confirmation Procedure
WITH CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Turn ignition switch ªOFFº, and immediately turn ªONº within 1second.
4) Start engine and let it idle.
5) If DTC is detected, go to ªDiagnostic Procedureº, EC-232.
WITHOUT CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch ªOFFº, and immediately turn ªONº within 1 second.
3) Start engine and let it idle.
4) Turn ignition switch ªOFFº, wait at least 5 seconds and then turn ªONº.
5) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with ECM.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-232.SEF817Y
DTC 1003 EGR VOLUME CONT/VZD30DDTi
EC-229
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Wiring Diagram
LHD MODELS
YEC193A
DTC 1003 EGR VOLUME CONT/VZD30DDTi
EC-230
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RHD MODELS
YEC194A
DTC 1003 EGR VOLUME CONT/VZD30DDTi
Wiring Diagram (Cont'd)EC-231
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Diagnostic Procedure
1 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ªOFFº.
2. Disconnect EGR volume control valve harness connector.
MEC019E
3. Turn ignition switch ªONº.
4. Check voltage between EGR volume control valve terminals 2, 5 and ground with CONSULT-II or tester.
SEF412Y
OK or NG
OK EGO TO 7.
NG EGO TO 2.
DTC 1003 EGR VOLUME CONT/VZD30DDTi
EC-232
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2 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-II
1. Turn ignition switch ªOFFº.
2. Disconnect ECM relay.
MEC021E
3. Check harness continuity between ECM relay terminal 7 and EGR volume control valve terminals 2 and 5. Refer to Wiring Dia-gram. Continuity should exist.
OK or NG
OK EGO TO 4.
NG EGO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M807, E201
I Harness for open or short between EGR volume control valve and ECM relay
ERepair open circuit or short to ground or short to power in harness or connectors.
4 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-III
Check voltage between ECM relay terminal 6 and ground with CONSULT-II or tester.
SEF297Z
OK or NG
OK EGO TO 6.
NG EGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
I10A fuse
I Harness for open or short between ECM relay and battery
ERepair open circuit or short to ground or short to power in harness or connectors.
DTC 1003 EGR VOLUME CONT/VZD30DDTi
Diagnostic Procedure (Cont'd)
EC-233
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6 CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.
SEF296X
OK or NG
OK EGO TO 7.
NG EReplace ECM relay.
7 CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.
Refer to Wiring Diagram.
MTBL0442
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK EGO TO 9.
NG EGO TO 8.
8 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E225, F108
I Harness connectors F135, M842 (RHD models)
I Harness for open or short between EGR volume control valve and ECM
ERepair open circuit or short to ground or short to power in harness or connectors.
DTC 1003 EGR VOLUME CONT/VZD30DDTi
Diagnostic Procedure (Cont'd)
EC-234
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9 CHECK EGR VOLUME CONTROL VALVE-I
Check resistance between EGR volume control valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.
SEF414Y
OK or NG
OK (With CONSULT-II) EGO TO 9.
OK (Without CONSULT-II) EGO TO 10.
NG EReplace EGR volume control valve.
10 CHECK EGR VOLUME CONTROL VALVE-II
With CONSULT-II
1. Remove EGR volume control valve.
2. Reconnect ECM harness connector and EGR volume control valve harness connector.
3. Turn ignition switch ªONº.
4. Perform ªEGR VOL CONT/Vº in ªACTIVE TESTº mode with CONSULT-II.
5. Check that EGR volume control valve shaft moves smoothly forward and backward according to the valve opening steps.
SEF819Y
OK or NG
OK EGO TO 11.
NG EReplace EGR volume control valve.
DTC 1003 EGR VOLUME CONT/VZD30DDTi
Diagnostic Procedure (Cont'd)
EC-235
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