2003 NISSAN ALMERA N16 ecm

EC-362
[QG (WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
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.
Diagnostic ProcedureEBS00KCQ
1. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch “OFF”.
2. Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
101 R/G Stop lamp switch[Engine is running]
●Brake pedal fully releasedApproximately 0V
[Engine is running]
●Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
Brake pedal Stop lamp
Fully released Not illuminated
Depressed Illuminated
MBIB0152E
Voltage: Battery voltage
PBIB0117E

DTC P1805 BRAKE SWITCH
EC-363
[QG (WITH EURO-OBD)]
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3.DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●Fuse block (J/B) connector M2
●Harness for open and short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
4. Check harness continuity between ECM terminal 101 and stop
lamp switch terminal 2.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK STOP LAMP SWITCH
Refer to EC-364, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
MBIB0152E

IGNITION SIGNAL
EC-365
[QG (WITH EURO-OBD)]
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IGNITION SIGNALPFP:22448
Component DescriptionEBS00KCS
IGNITION COIL & POWER TRANSISTOR
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.
M B I B 0 111 E

IGNITION SIGNAL
EC-367
[QG (WITH EURO-OBD)]
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EC
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
COLORITEM CONDITION DATA (DC Voltage)
111 W / GECM relay
(Self shut-off)[Engine is running]
[Ignition switch “OFF”]
●For a few seconds after turning ignition
switch “OFF”.0 - 1.0V
[Ignition switch “OFF”]
●More than a few seconds passed after turn-
ing ignition switch “OFF”.BATTERY VOLTAGE
(11 - 14V)
11 9
120W
WPower supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)

IGNITION SIGNAL
EC-369
[QG (WITH EURO-OBD)]
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EC
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureEBS00KCU
1.CHECK ENGINE START
Turn ignition switch “OFF”, and restart engine.
Is engine running?
Ye s o r N o
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No >> GO TO 4.
2.CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
2. Make sure that each circuit produces a momentary engine
speed drop.
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
60
61
79
80L/R
BR
GY/R
PUIgnition signal No. 3
Ignition signal No. 1
Ignition signal No. 4
Ignition signal No. 2[Engine is running]
●Warm-up condition
●Idle speed0 - 0.1V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.0 - 0.2V
PBIB0521E
PBIB0522E
PBIB0133E

EC-370
[QG (WITH EURO-OBD)]
IGNITION SIGNAL
3. CHECK OVERALL FUNCTION
Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminals 60, 61, 79, 80
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 11.
4. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> Go to EC-110, "
POWER SUPPLY CIRCUIT FOR ECM"
.
5. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between condenser terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 11.
NG >> GO TO 6.
MBIB0033EPBIB0521E
Voltage: Battery voltage
MBIB0034E
Voltage: Battery voltage
PBIB0624E

IGNITION SIGNAL
EC-371
[QG (WITH EURO-OBD)]
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6.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.
3. Check harness continuity between ECM relay terminal 7 and
condenser terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between ECM relay and condenser
>> Repair open circuit or short to ground or short to power in harness connectors.
8.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
Check voltage between ECM relay terminal 6 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
●15A fuse
●Harness for open or short between ECM relay and battery
>> Repair or replace harness or connectors.
10.CHECK ECM RELAY
Refer to EC-373, "
Component Inspection" .
OK or NG
OK >> GO TO 18.
NG >> Replace ECM relay.Continuity should exist.
MBIB0247E
Voltage: Battery voltage
PBIB0625E

EC-372
[QG (WITH EURO-OBD)]
IGNITION SIGNAL
11 . CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to power in harness or connector.
12. CHECK CONDENSER
Refer to EC-373, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace condenser.
13. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Turn ignition switch “OFF”.
2. Reconnect all harness connectors disconnected.
3. Disconnect ignition coil harness connector.
4. Turn ignition switch “ON”.
5. Check voltage between ignition coil terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 15.
NG >> GO TO 14.
14. DETECT MALFUNCTIONING PART
Check the following.
●Harness for open or short between ignition coil and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors. Continuity should exist.
M B I B 0 111 E
Voltage: Battery voltage
SEF107S