Nissan Primera P12. Instruction — part 359
EGR VOLUME CONTROL SYSTEM
EC-621
[YD (WITHOUT EURO-OBD)]
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EC
ECM Terminals and Reference Value
EBS015CL
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.
MONITOR ITEM
CONDITION
SPECIFICATION
EGR VOL CON/V
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: Neutral position
●
No-load
After one minute at idle
More than 10 steps
Revving engine from idle to 3,600
rpm
0 step
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage)
25
26
27
28
GY
W/L
OR/B
GY/B
EGR volume control valve
[Engine is running]
●
Warm-up condition
●
Idle speed
0.1 - 14V
(Voltage signals of each ECM ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
105
113
G
G
ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
●
For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
●
A few seconds passed after turning ignition
switch OFF
BATTERY VOLTAGE
(11 - 14V)
119
120
R
R
Power supply for ECM
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
EC-622
[YD (WITHOUT EURO-OBD)]
EGR VOLUME CONTROL SYSTEM
Wiring Diagram
EBS015CM
MBWA0618E
EGR VOLUME CONTROL SYSTEM
EC-623
[YD (WITHOUT EURO-OBD)]
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EC
Diagnostic Procedure
EBS015CN
1.
CHECK EGR VOLUME CONTROL SYSTEM OVERALL FUNCTION
1.
Turn ignition switch OFF.
2.
Set the oscilloscope probe between ECM terminals 25, 26, 27, 28 and ground.
3.
Start engine and let it idle.
4.
Check the oscilloscope screen when revving engine up to 3,200 rpm and return to idle.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Disconnect EGR volume control valve harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between EGR volume control valve terminals 2, 5
and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 3.
The pulse signal as shown in the figure should appear.
MBIB0617E
MBIB0088E
Voltage: Battery voltage
PBIB0431E
EC-624
[YD (WITHOUT EURO-OBD)]
EGR VOLUME CONTROL SYSTEM
3.
CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM relay.
3.
Check harness continuity between ECM relay terminal 5 and
EGR volume control valve terminals 2, 5. Refer to Wiring Dia-
gram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair 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 3 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E62, F12
●
10A fuse
●
Harness for open or short between ECM relay and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK ECM RELAY
Refer to
EC-560, "Component Inspection"
.
OK or NG
OK
>> GO TO 9.
NG
>> Replace ECM relay.
Continuity should exist.
MBIB1086E
Voltage: Battery voltage
PBIB0432E
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