Nissan Silvia. Manual — part 177
10
CHECK HEADLAMP INPUT SIGNAL CIRCUIT
A/T models
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harness connector.
4. Check harness continuity between ECM terminal 33 and lighting switch terminal 10 under the following conditions.
SEC431C
5. Also check harness for short to ground and short to power.
M/T models
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect lighting switch harness connector.
4. Check harness continuity between ECM terminal 33 and lighting switch terminal 10. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 12.
NG
©
GO TO 11.
11
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F4, M60
I
Harness connectors M10, E101
I
Joint connector-1
I
Harness for open and short between ECM and lighting switch
©
Repair open circuit or short to ground or short to power in harness or connectors.
12
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-82.
©
INSPECTION END
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont’d)
EC-223
Wiring Diagram
NMEC0800
TEC822
MI & DATA LINK CONNECTORS
Wiring Diagram
EC-224
Fuel Pressure Regulator
NMEC0801
Fuel pressure at idling
kPa (bar, kg/cm
2
, psi)
Vacuum hose is connected
Approximately 245 (2.45, 2.5, 36)
Vacuum hose is disconnected
Approximately 294 (2.94, 3.0, 43)
Idle Speed and Ignition Timing
NMEC0802
Target idle speed*1
rpm
No-load*3 (in “P” or “N” position)
800
±
50
Air conditioner: ON
rpm
In “P” or “N” position
800
±
50
Ignition timing*2
In “P” or “N” position
15°
±
2° BTDC
Throttle position sensor idle position
V
0.15 - 0.85
*1: Throttle position sensor harness connector connected
*2: Throttle position sensor harness connector disconnected
*3: Under the following conditions:
I
Air conditioner switch: OFF
I
Electrical load: OFF (Lights & rear window defogger)
I
Steering wheel: Kept in straight-ahead position
Mass Air Flow Sensor
NMEC0804
Supply voltage
V
Battery voltage (11 - 14)
Output voltage
V
0.8 - 1.5
Engine Coolant Temperature Sensor
NMEC0805
Temperature
°C (°F)
Resistance
k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
Fuel Pump
NMEC0808
Resistance [at 25°C (77°F)]
Ω
0.2 - 5.0
IACV-AAC Valve
NMEC0809
Resistance [at 20°C (68°F)]
Ω
Approximately 10
Injector
NMEC0810
Resistance [at 20°C (68°F)]
Ω
Approximately 11
Throttle Position Sensor
NMEC0812
Throttle valve conditions
Voltage (at normal operating temperature, engine off, ignition switch ON,
throttle opener disengaged)
Completely closed (a)
0.15 - 0.85V
Partially open
Between (a) and (b)
Completely open (b)
3.5 - 4.7V
Heated Oxygen Sensor 1 (Front) Heater
NMEC0813
Resistance [at 25°C (77°F)]
Ω
2.3 - 4.3
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Pressure Regulator
EC-225
NOTES
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