Nissan Silvia. Instruction — part 146
Fail-safe Mode
NMEC0675
Detected items
Engine operating condition in fail-safe mode
Mass air flow sensor circuit
Engine speed will not rise more than 2,400 rpm due to the fuel
cut.
DTC Confirmation Procedure
NMEC0676
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 5 seconds
before conducting the next test.
SEC447C
PROCEDURE FOR MALFUNCTION A
NMEC0676S01
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 5 seconds.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-102.
Without CONSULT-II
1)
Turn ignition switch “ON”, and wait at least 5 seconds.
2)
Turn ignition switch “OFF”, wait at least 5 seconds and then
turn “ON”.
3)
Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-102.
SEC447C
PROCEDURE FOR MALFUNCTION B
NMEC0676S02
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Start engine and wait at least 2 seconds.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-102.
Without CONSULT-II
1)
Start engine and wait at least 2 seconds.
2)
Turn ignition switch “OFF”, wait at least 5 seconds and then
turn “ON”.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC 0102 MASS AIR FLOW SENSOR (MAFS)
Fail-safe Mode
EC-99
3)
Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-102.
DTC 0102 MASS AIR FLOW SENSOR (MAFS)
DTC Confirmation Procedure (Cont’d)
EC-100
Wiring Diagram
NMEC0677
TEC800
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC 0102 MASS AIR FLOW SENSOR (MAFS)
Wiring Diagram
EC-101
Diagnostic Procedure
NMEC0678
1
INSPECTION START
Which malfunction (A, or B) is duplicated?
Malfunction A or B
A
©
GO TO 3.
B
©
GO TO 2.
2
CHECK INTAKE SYSTEM
Check the following for connection.
I
Air duct
I
Vacuum hoses
I
Intake air passage between air duct to collector
OK or NG
OK
©
GO TO 3.
NG
©
Reconnect the parts.
3
RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEC377C
©
GO TO 4.
DTC 0102 MASS AIR FLOW SENSOR (MAFS)
Diagnostic Procedure
EC-102
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