Nissan Frontier D22. Manual — part 358
IGNITION SIGNAL
EC-535
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
2.
Make sure that all circuits do not produce a momentary engine
speed drop.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
3.
CHECK OVERALL FUNCTION
Without CONSULT-II
1.
Let engine idle.
2.
Read the voltage signal between ECM terminal 1 and ground with an oscilloscope.
3.
Verify that the oscilloscope screen shows the signal wave as shown below.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
SEF981Z
SEF984Z
EC-536
[KA24DE]
IGNITION SIGNAL
4.
CHECK POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect distributor harness connector F17.
3.
Turn ignition switch ON.
4.
Check voltage between ignition coil terminal 7 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E43, M65
●
Harness connectors M59, F27
●
Harness for open or short between ignition coil and ignition switch
>> Repair harness or connectors.
6.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect distributor harness connector F13.
3.
Check harness continuity between power transistor terminal 2 and engine ground.
Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to power in harness or connectors.
SEF344V
Voltage
: Battery voltage
AEC698
Continuity should exist.
IGNITION SIGNAL
EC-537
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
7.
CHECK OUTPUT SIGNAL CIRCUIT
1.
Stop engine.
2.
Disconnect distributor harness connector F13.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between ECM terminal 1 and power
transistor terminal 1.
Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
8.
CHECK IGNITION COIL
1.
Remove distributor cap.
2.
Check resistance as shown in the figure.
OK or NG
OK
>> GO TO 9.
NG
>> Replace distributor assembly as a unit.
9.
CHECK POWER TRANSISTOR
1.
Disconnect distributor harness connector F17.
2.
Check power transistor resistance between terminals 2 and 8.
OK or NG
OK
>> GO TO 10.
NG
>> Replace distributor assembly.
Continuity should exist.
SEF344V
Terminal
Resistance [at 25
°C (77°F)]
7 - 8
Less than 1
Ω
7 - 9
7 - 13
Ω
AEC150A
Terminals
Resistance
Result
2 and 8
Except 0
Ω
OK
0
Ω
NG
AEC151A
EC-538
[KA24DE]
IGNITION SIGNAL
10.
CHECK INPUT SIGNAL CIRCUIT
1.
Strip tape covering resistor.
2.
Disconnect resistor harness connector.
3.
Check harness continuity between ignition coil terminal 8 and
resistor terminal 1, resistor terminal 2 and ECM terminal 2.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 11.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
11.
CHECK RESISTOR
Check resistance between resistor terminals 1 and 2.
OK or NG
OK
>> GO TO 12.
NG
>> Replace resistor.
12.
CHECK INTERMITTENT INCIDENT
EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Removal and Installation
UBS00DD3
DISTRIBUTOR
EM-13, "OUTER COMPONENT PARTS"
Continuity should exist.
SEF344V
Resistance
: Approximately 2.2 k
Ω [at 25°C (77°F)]
SEF240V
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