Nissan Terrano model r20 series 2004. Manual — part 126
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
E
GO TO 10.
NG
E
GO TO 9.
9
DETECT MALFUNCTIONING PART
Check the following.
I
Harness 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 “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-78.
E
INSPECTION END
DTC 0905 TURBO PRESSURE
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-226
Description
SYSTEM DESCRIPTION
Sensor
Input Signal to ECM
ECM Function
Actuator
Electronic controlled fuel injection pump
Fuel injection signal
EGR volume
control
EGR 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.
I
Engine 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/V
ZD30DDTi
EC-227
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
EGR VOL CON/V
I
Engine: After warming up
I
Air conditioner switch: “OFF”
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
115
G/Y
Y/B
R/L
On Board Diagnosis Logic
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
1003
I
An excessively low voltage signal is sent to ECM.
I
Harness or connectors
(The EGR volume control valve circuit is open or
shorted.)
I
EGR volume control valve
DTC 1003 EGR VOLUME CONT/V
ZD30DDTi
EC-228
DTC Confirmation Procedure
WITH CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Turn ignition switch “OFF”, and immediately turn “ON” within 1
second.
4) Start engine and let it idle.
5) If DTC is detected, go to “Diagnostic Procedure”, EC-232.
WITHOUT CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF”, and immediately turn “ON” within 1
second.
3) Start engine and let it idle.
4) Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
5) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
6) If DTC is detected, go to “Diagnostic Procedure”, EC-232.
SEF817Y
DTC 1003 EGR VOLUME CONT/V
ZD30DDTi
EC-229
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст