Nissan Almera Tino V10. Instruction — part 328
EC-138
[QG (WITH EURO-OBD)]
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
PFP:00006
Description
EBS00QHC
Intermittent incidents (I/I) may occur. In many cases, the malfunction resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the customer's
complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent cause of I/I occur-
rences is poor electrical connections. Because of this, the conditions under which the incident occurred may
not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the
specific malfunctioning area.
Common I/I Report Situations
Diagnostic Procedure
EBS00QHD
1.
INSPECTION START
Erase (1st trip) DTCs. Refer to
EC-68, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMA-
.
>> GO TO 2.
2.
CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to “HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT”, GI-21, “Incident
Simulation Tests”.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
3.
SEARCH FOR ELECTRICAL INCIDENT
Perform “HOW TO PERFORM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT”, GI-21, “Incident
Simulation Tests”.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace.
STEP in Work Flow
Situation
II
The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0” or “[1t]”.
III
The symptom described by the customer does not recur.
IV
(1st trip) DTC does not appear during the DTC Confirmation Procedure.
VI
The Diagnostic Procedure for PXXXX does not indicate the malfunctioning area.
POWER SUPPLY CIRCUIT FOR ECM
EC-139
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
POWER SUPPLY CIRCUIT FOR ECM
PFP:24110
Wiring Diagram
EBS00QHE
YEC432A
EC-140
[QG (WITH EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
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.
Diagnostic Procedure
EBS00QHF
1.
INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes
>> GO TO 10.
No
>> GO TO 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch “OFF” and then “ON”.
2.
Check voltage between ECM terminal 109 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
B
ECM ground
[Engine is running]
●
Idle speed
Engine ground
109
B/R
Ignition switch
[Ignition switch “OFF”]
0V
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
111
W/G
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch “OFF”]
●
For 3 seconds after turning ignition switch “OFF”
0 - 1.0V
[Ignition switch “OFF”]
●
3 seconds passed after turning ignition switch
“OFF”
BATTERY VOLTAGE
(11 - 14V)
115
116
B
B/Y
ECM ground
[Engine is running]
●
Idle speed
Engine ground
119
120
W
W
Power supply for
ECM
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0015E
POWER SUPPLY CIRCUIT FOR ECM
EC-141
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminals 1, 115, 116 and engine ground.
Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M71, F45
●
Harness for open or short between ECM and engine ground
>> Repair open circuit or short to power in harness or connectors.
6.
CHECK ECM POWER SUPPLY CIRCUIT-II
1.
Disconnect ECM relay.
2.
Check voltage between ECM relay terminals 1 and 6 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
Continuity should exist.
MBIB0999E
Voltage: Battery voltage
SEF420X
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