Nissan Terrano r20e. Instruction — part 132
RHD MODELS
YEC182A
DTC 0701 P1
⋅
CAM POS SEN
ZD30DDTi
Wiring Diagram (Cont’d)
EC-165
Diagnostic Procedure
1
CHECK ELECTRONIC CONTROL FUEL INJECTION PUMP POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect electronic control fuel injection pump harness connector.
MEC025E
3. Turn ignition switch “ON”.
4. Check voltage between electronic control fuel injection pump terminal 7 and ground.
MEC977D
Voltage: Battery voltage
OK or NG
OK
E
GO TO 3.
NG
E
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M787, F66
I
Harness connectors F108, E225
I
Harness connectors E220, E231
I
Harness connectors M842, F135 (RHD models)
I
Harness for open or short between electronic control fuel injection pump and ECM
I
Harness for open or short between electronic control fuel injection pump and ECM relay
E
Repair open circuit or short to ground or short to power in harness or connectors.
3
CHECK ELECTRONIC CONTROL FUEL INJECTION PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between electronic control fuel injection pump terminal 6 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
E
GO TO 5.
NG
E
GO TO 4.
DTC 0701 P1
⋅
CAM POS SEN
ZD30DDTi
EC-166
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E231, E220
I
Harness for open or short between electronic control fuel injection pump and engine ground
E
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK COMMUNICATION LINE FOR OPEN AND SHORT
1. Check continuity between the following terminals. Refer to Wiring Diagram.
MTBL0444
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK
E
GO TO 7.
NG
E
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E231, E220
I
Harness connectors E227, F106
I
Harness connectors F135, M842 (RHD models)
I
Harness for open or short between electronic control fuel injection pump and ECM
E
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-78.
OK or NG
OK
E
Replace electronic control fuel injection pump.
NG
E
Repair open circuit or short to ground or short to power in harness or connectors.
DTC 0701 P1
⋅
CAM POS SEN
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-167
Description
SYSTEM DESCRIPTION
The ECM and the electronic control fuel injection pump control unit
(abbreviated as the injection pump control unit) perform the real
time communication (signal exchange).
The ECM transmits the signals of the target fuel injection amount,
target fuel injection timing, and engine speed, etc., and receives the
signals of the pump speed and fuel temperature, etc. from the
injection pump control unit.
By those signals, the injection pump controls the optimum fuel
injection amount and injection timing of the spill valve and timing
control valve.
Injection pump control unit has an on board diagnostic system,
which detects malfunctions related to sensors or actuators built-into
electronic control fuel injection pump. These malfunction informa-
tion are transferred through the line (circuit) from injection pump
control unit to ECM.
FUEL INJECTION AMOUNT CONTROL
In accordance with the target fuel injection amount signal from the
ECM, the injection amount is controlled by controlling the spill valve
in the injection pump and by changing the needle opening time.
FUEL INJECTION TIMING CONTROL
Based on the target fuel injection timing signal from the ECM, the
injection timing is controlled in accordance with the timer spring by
performing the duty control of the timing control valve in the injec-
tion pump and by adjusting the pressure of the timer piston high
pressure chamber.
FUEL TEMPERATURE SENSOR
The sensor detects the fuel temperature in the injection pump and
calibrates the injection amount change by the fuel temperature.
CAM RING POSITION SENSOR
The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic resis-
tance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance amount. The
injection pump control unit measures the injection pump revolution
by the signal of the cam ring position sensor.
SEF437Y
DTC 0702 P2
⋅
TDC PULSE SIG
ZD30DDTi
EC-168
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