Nissan Silvia. Instruction — part 170
Wiring Diagram
NMEC0770
TEC811
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Wiring Diagram
EC-195
Diagnostic Procedure
NMEC0771
1
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
PEF389V
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
MEC703B
Clicking noise should be heard.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
INJECTOR
Diagnostic Procedure
EC-196
2
CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect injector harness connector.
SEC392C
3. Turn ignition switch “ON”.
4. Check voltage between terminal 2 and ground with CONSULT-II or tester.
SEF078W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
I
10A fuse
I
Harness connectors M60, F4
I
Harness connectors F27, F111
I
Harness for open or short between injector and fuse
©
Repair harness or connectors.
4
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector harness connector terminal 1 and ECM terminals 101, 103, 110, 112.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-197
5
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F27, F111
I
Harness for open or short between ECM and injector.
©
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK INJECTOR
Refer to “Component Inspection”, EC-198.
OK or NG
OK
©
GO TO 7.
NG
©
Replace injector.
7
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-82.
©
INSPECTION END
SEF625V
Component Inspection
NMEC0772
INJECTOR
NMEC0772S01
1.
Disconnect injector harness connector.
2.
Check resistance between terminals as shown in the figure.
Resistance: Approximately 11
Ω
[at 20°C (68°F)]
If NG, replace injector.
INJECTOR
Diagnostic Procedure (Cont’d)
EC-198
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