Nissan Silvia. Instruction — part 143
8
CHECK ECM POWER SUPPLY CIRCUIT-II
1. Stop engine.
2. Check voltage between ECM terminals 46, 109 and ground with CONSULT-II or tester.
SEC403C
OK or NG
OK
©
GO TO 10.
NG
©
GO TO 9.
9
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M60, F4
I
Harness for open or short between ECM and harness connector F4
©
Repair harness or connectors.
10
CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 38, 47 and ground with CONSULT-II or tester.
SEC404C
OK or NG
OK
©
GO TO 15.
NG (Battery voltage
does not exist.)
©
GO TO 11.
NG (Battery voltage
exists for more than a
few seconds.)
©
GO TO 13.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit (Cont’d)
EC-87
11
CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay.
SEC376C
2. Check voltage between ECM relay terminal 5 and ground with CONSULT-II or tester.
SEC405C
OK or NG
OK
©
GO TO 13.
NG
©
GO TO 12.
12
DETECT MALFUNCTIONING PART
Check the following.
I
Harness for open or short between ECM relay and harness connector F4
©
Repair open circuit or short to ground or short to power in harness or connectors.
13
CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 38, 47 and ECM relay terminal 3.
Refer to WIRING DIAGRAM.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 14.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit (Cont’d)
EC-88
14
CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
SEF296X
OK or NG
OK
©
GO TO 15.
NG
©
Replace ECM relay.
15
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 6, 13, 39, 48, 107, 108, 116 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK
©
GO TO 16.
NG
©
Repair open circuit or short to power in harness or connectors.
16
CHECK INTERMITTENT INCIDENT
Refer to “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
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit (Cont’d)
EC-89
MEF328G
SEF853B
Component Description
NMEC0664
The camshaft position sensor is a basic component of the engine
control system. It monitors engine speed and piston position.
These input signals to the engine control system are used to con-
trol fuel injection, ignition timing and other functions.
The camshaft position sensor has a rotor plate and a wave-form-
ing circuit. The rotor plate has 360 slits for a 1° (POS) signal and
4 slits for a 180° (REF) signal. The wave-forming circuit consists
of Light Emitting Diodes (LED) and photo diodes.
The rotor plate is positioned between the LED and the photo diode.
The LED transmits light to the photo diode. As the rotor plate turns,
the slits cut the light to generate rough-shaped pulses. These
pulses are converted into on-off signals by the wave-forming circuit
and sent to the ECM.
The distributor is not repairable and must be replaced as an
assembly except distributor cap and rotor head.
ECM Terminals and Reference Value
NMEC0665
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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
31
LG
Camshaft position sen-
sor (Reference signal)
[Engine is running]
I
Warm-up condition
I
Idle speed
0.4 - 0.8V
SEC366C
[Engine is running]
I
Engine speed is 2,000 rpm
Approximately 0.6V
SEC367C
DTC 0101 CAMSHAFT POSITION SENSOR (CMPS)
Component Description
EC-90
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст