Qashqai J11. Engine control system (MR20DD) — part 24
ECM-370
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P2138 APP SENSOR
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace malfunctioning part.
10.
CHECK ECM GROUND CIRCUIT
Check the continuity between ECM harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning part.
11.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT
1.
Check the continuity between APP sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair or replace malfunctioning part.
12.
CHECK APP SENSOR
Check the APP sensor. Refer to
ECM-370, "Component Inspection"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace accelerator pedal assembly. Refer to
ACC-3, "Removal and Installation"
Component Inspection
INFOID:0000000010703058
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
Turn ignition switch ON.
4.
Check the voltage between ECM harness connector terminals as per the following condition.
+
−
Continuity
ECM
Connector
Terminal
F15
11
Ground
Existed
E57
123
125
128
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E20
3
E57
126
Existed
6
119
P2138 APP SENSOR
ECM-371
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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ECM
N
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Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace accelerator pedal assembly. Refer to
ACC-3, "Removal and Installation"
ECM
Condition
Voltage
Connector
+
–
Terminal
E57
126
127
Accelerator pedal
Fully released
0.6 - 0.9 V
Fully depressed
3.9 - 4.7 V
119
120
Fully released
0.3 - 0.6 V
Fully depressed
1.95 - 2.4 V
ECM-372
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
FUEL INJECTOR
FUEL INJECTOR
Component Function Check
INFOID:0000000010703059
1.
INSPECTION START
Turn ignition switch to START.
Are any cylinders ignited?
YES
>> GO TO 2.
NO
>> Proceed to
ECM-372, "Diagnosis Procedure"
.
2.
CHECK FUEL INJECTOR FUNCTION
With CONSULT
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
3.
Check that each circuit produces a momentary engine speed drop.
Without CONSULT
1.
Start engine and let it idle.
2.
Listen to each fuel injector operating sound.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-372, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010703060
1.
CHECK FUEL INJECTOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between fuel injector harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 2.
2.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between fuel injector harness connector and ECM harness connector.
Clicking sound should be heard.
PBIB3332E
+
−
Voltage
Fuel injector
Cylinder
Connector
Terminal
1
F29
1
Ground
Battery voltage
2
F30
1
3
F31
1
4
F32
1
FUEL INJECTOR
ECM-373
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
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ECM
N
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4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK FUEL INJECTOR DRIVER POWER SUPPLY
1.
Disconnect ECM harness connector.
2.
Turn ignition switch ON.
3.
Check the continuity between ECM harness connector and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> GO TO 4.
4.
CHECK FUEL INJECTOR DRIVER POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect fuel injector relay harness connector.
4.
Check the continuity between ECM harness connector and fuel injector relay harness connector.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning part.
5.
CHECK FUEL INJECTOR RELAY POWER SUPPLY (CONTACT SIDE)
Check the voltage between fuel injector relay harness connector and ground.
+
−
Continuity
Fuel injector
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F29
1
F15
1
Existed
2
F30
1
2
3
F31
1
3
4
F32
1
4
+
−
Voltage
ECM
Connector
Terminal
F16
49
Ground
Battery voltage
53
+
−
Continuity
ECM
Fuel injector relay
Connector
Terminal
Connector
Terminal
F16
49
F49
5
Existed
53
7
+
−
Voltage
Fuel injector relay
Connector
Terminal
F49
3
Ground
Battery voltage
6
ECM-374
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
FUEL INJECTOR
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Perform trouble diagnosis for power supply circuit.
6.
CHECK FUEL INJECTOR RELAY POWER SUPPLY (EXCITATION COIL SIDE)
1.
Install all removed parts.
2.
Turn ignition switch ON.
3.
Check the voltage between fuel injector relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
CHECK FUEL INJECTOR RELAY POWER SUPPLY (EXCITATION COIL SIDE)
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector relayharness connector.
3.
Disconnect IPDM E/R harness connector.
4.
Check the continuity between IPDM E/R harness connector and fuel injector relay harness connector.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
8.
CHECK FUEL INJECTOR RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector relay harness connector.
3.
Check the continuity between fuel injector relay harness connector and ground.
4.
Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace malfunctioning part.
9.
CHECK FUEL INJECTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between fuel injector harness connector and ECM harness connector.
+
−
Voltage
Fuel injector relay
Connector
Terminal
F49
1
Ground
Battery voltage
+
−
Continuity
IPDM E/R
Fuel injector relay
Connector
Terminal
Connector
Terminal
F90
96
F49
1
Existed
+
−
Continuity
Fuel injector relay
Connector
Terminal
F49
2
Ground
Existed
FUEL INJECTOR
ECM-375
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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ECM
N
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4.
Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair or replace malfunctioning part.
10.
CHECK FUEL INJECTOR RELAY
Check fuel injector relay. Refer to
ECM-375, "Component Inspection (Fuel Injector Relay)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace fuel injector relay.
11.
CHECK FUEL INJECTOR
Check fuel injector. Refer to
ECM-375, "Component Inspection (Fuel Injector)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace fuel injector. Refer to
EM-164, "Removal and Installation"
.
Component Inspection (Fuel Injector)
INFOID:0000000010703061
1.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
3.
Check the resistance between fuel injector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fuel injector relay.
Component Inspection (Fuel Injector Relay)
INFOID:0000000010703062
1.
CHECK FUEL INJECTOR RELAY
1.
Turn ignition switch OFF.
2.
Remove fuel injector relay.
+
−
Continuity
Fuel injector
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F29
2
F15
5
Existed
2
F30
2
6
3
F31
2
7
4
F32
2
8
Fuel injector
Resistance
(Approx.)
+
−
Terminal
1
2
1.44 – 1.73
Ω
[at 10 – 60
°
C (50 –140
°
F)]
ECM-376
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
FUEL INJECTOR
3.
Check the continuity between fuel injector relay terminals as per
the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fuel injector relay.
+
−
Condition
Continuity
Fuel injector relay
Terminal
3
5
12 V direct current supply between ter-
minals 1 and 2
Existed
No current supply
Not existed
6
7
12 V direct current supply between ter-
minals 1 and 2
Existed
No current supply
Not existed
JSBIA1178ZZ
LOW PRESSURE FUEL PUMP
ECM-377
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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ECM
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LOW PRESSURE FUEL PUMP
Component Function Check
INFOID:0000000010703063
1.
CHECK LOW PRESSURE FUEL PUMP FUNCTION
1.
Turn ignition switch ON.
2.
Pinch fuel feed hose
with two fingers.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-377, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010703064
1.
CHECK FUEL PUMP RELAY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between ECM harness connector and IPDM E/R harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
3.
CHECK FUEL PUMP POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Reconnect ECM harness connector.
3.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
4.
Turn ignition switch ON.
5.
Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Fuel pressure pulsation should be felt on the fuel
feed hose for 1 second after ignition switch is
turned ON.
JSBIA0601ZZ
+
−
Voltage
ECM
Connector
Terminal
Connector
Terminal
F16
87
E57
128
Battery voltage
+
−
Continuity
ECM
IPDM E/R
Connector
Terminal
Connector
Terminal
F16
87
F90
106
Existed
ECM-378
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
LOW PRESSURE FUEL PUMP
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between “fuel level sensor unit and fuel pump” harness connector and IPDM E/R
harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
5.
CHECK FUEL PUMP GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between “fuel level sensor unit and fuel pump” harness connector and ground.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning part.
6.
CHECK FUEL PUMP
Check fuel pump. Refer to
ECM-378, "Component Inspection (Fuel Pump)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace “fuel level sensor unit and fuel pump”. Refer to
FL-19, "Removal and Installation"
.
Component Inspection (Fuel Pump)
INFOID:0000000010703065
1.
CHECK FUEL PUMP
1.
Turn ignition switch OFF.
2.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
3.
Check the resistance between “fuel level sensor unit and fuel pump” terminals as follows.
+
−
Voltage
Fuel level sensor unit and fuel
pump
Connector
Terminal
B72
1
Ground
Battery voltage should exist 1 second after igni-
tion switch is turn ON.
+
−
Continuity
Fuel level sensor unit and fuel
pump
IPDM E/R
Connector
Terminal
Connector
Terminal
B72
1
E39
48
Existed
+
−
Continuity
Fuel level sensor unit and fuel pump
Connector
Terminal
B72
3
Ground
Existed
LOW PRESSURE FUEL PUMP
ECM-379
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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ECM
N
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Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace “fuel level sensor unit and fuel pump”. Refer to
FL-19, "Removal and Installation"
.
Fuel level sensor unit and fuel pump
Resistance
+
−
Terminal
1
3
0.2 - 5.0
Ω
[at 25
°
C (77
°
F)]
ECM-380
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
HIGH PRESSURE FUEL PUMP
HIGH PRESSURE FUEL PUMP
Component Function Check
INFOID:0000000010703066
1.
CHECK HIGH PRESSURE FUEL PUMP FUNCTION
With CONSULT
1.
Start engine.
2.
Select “FUEL PRES SEN V” in “DATA MONITOR” mode of “ENGINE” using CONSULT and check the
indication as per the following conditions.
Without CONSULT
1.
Start engine.
2.
Check the voltage between ECM terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-380, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010703067
1.
CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
Monitor item
Condition
Indication
FUEL PRES SEN V
At idle
820 - 1,140 mV
Revving engine up to 4,000 rpm quickly.
820 - 2,900 mV
ECM
Condition
Voltage
Voltage
+
−
Terminal
F16
51
52
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle.
Battery voltage
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
Battery voltage
(11 - 14 V)
JPBIA4722ZZ
JPBIA4723ZZ
+
−
Voltage
ECM
Connector
Terminal
F16
50
Ground
Battery voltage
HIGH PRESSURE FUEL PUMP
ECM-381
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
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ECM
N
P
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YES
>> GO TO 8.
NO
>> GO TO 2.
2.
CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect high pressure fuel pump relay harness connector.
4.
Check the continuity between ECM harness connector and high pressure fuel pump relay harness con-
nector.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (CONTACT SIDE)
Check the voltage between high pressure fuel pump relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform the trouble diagnosis for power supply circuit.
4.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (EXCITATION COIL SIDE)
1.
Install all removed parts.
2.
Turn ignition switch ON.
3.
Check the voltage between high pressure fuel pump relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY CIRCUIT (EXCITATION COIL SIDE)
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump relay harness connector.
3.
Disconnect IPDM E/R harness connector.
4.
Check the continuity between IPDM E/R harness connector and high pressure fuel pump relay harness
connector.
+
−
Continuity
ECM
High pressure fuel pump relay
Connector
Terminal
Connector
Terminal
F16
50
F161
5
Existed
+
−
Voltage
High pressure fuel pump relay
Connector
Terminal
F161
3
Ground
Battery voltage
+
−
Voltage
High pressure fuel pump relay
Connector
Terminal
F161
1
Ground
Battery voltage
ECM-382
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
HIGH PRESSURE FUEL PUMP
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
6.
CHECK HIGH PRESSURE FUEL PUMP RELAY GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump relay harness connector.
3.
Check the continuity between high pressure fuel pump relay harness connector and ground.
4.
Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace malfunctioning part.
7.
CHECK HIGH PRESSURE FUEL PUMP RELAY
Check high pressure fuel pump relay. Refer to
ECM-384, "Component Inspection (High Pressure Fuel Pump
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace high pressure fuel pump relay. Refer to
for connector num-
ber,
PG-103, "LHD : Engine Room Harness"
PG-120, "RHD : Engine Room Harness"
(RHD) for relay location.
8.
CHECK HIGH PRESSURE FUEL PUMP CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector and high pressure fuel pump relay harness connector.
3.
Check the continuity between ECM harness connector and high pressure fuel pump harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace malfunctioning part.
9.
CHECK HIGH PRESSURE FUEL PUMP
Check high pressure fuel pump. Refer to
ECM-383, "Component Inspection (High Pressure Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
+
−
Continuity
IPDM E/R
High pressure fuel pump relay
Connector
Terminal
Connector
Terminal
F90
96
F161
1
Existed
+
−
Continuity
High pressure fuel pump relay
Connector
Terminal
F161
2
Ground
Existed
+
−
Continuity
ECM
High pressure fuel pump
Connector
Terminal
Connector
Terminal
F16
51
F161
1
Existed
52
2
HIGH PRESSURE FUEL PUMP
ECM-383
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
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ECM
N
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10.
CHECK HIGH PRESSURE FUEL PUMP INSTALLATION
1.
Turn ignition switch OFF.
2.
Check high pressure fuel pump for improper attachment or looseness.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair or replace malfunctioning part.
11.
CHECK CAMSHAFT
1.
Remove camshaft. Refer to
EM-197, "Removal and Installation"
2.
Check camshaft. Refer to
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace camshaft. Refer to
EM-197, "Removal and Installation"
.
Component Inspection (High Pressure Fuel Pump)
INFOID:0000000010703068
1.
CHECK HIGH PRESSURE FUEL PUMP-1
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump harness connector.
3.
check the resistance between high pressure fuel pump terminals as per the following conditions.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
2.
CHECK HIGH PRESSURE FUEL PUMP-2
With CONSULT
1.
Reconnect high pressure fuel pump harness connector.
2.
Start engine.
3.
Select “FUEL PRES SEN V” in “DATA MONITOR” mode of “ENGINE” using CONSULT and check the
indication as per the following conditions.
Without CONSULT
1.
Start engine.
2.
Check fuel rail pressure sensor signal voltage.
High pressure fuel pump
Condition
Resistance
+
−
Terminal
1
2
Temperature [
°
C (
°
F)]
20 - 30 (68 - 86)
0.46 - 0.51
Ω
Monitor item
Condition
Indication
FUEL PRES SEN V
At idle
820 - 1,140 mV
Revving engine up to 4,000 rpm quickly.
820 - 2,900 mV
ECM
Condition
Voltage
(Approx.)
Connector
+
−
Terminal
F15
33
39
[Engine is running]
• Warm-up condition
• Idle speed
0.82 – 1.14 V
[Engine is running]
• Warm-up condition
• Engine speed: Revving engine from idle to 4,000 rpm
0.82 – 2.9 V
ECM-384
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
HIGH PRESSURE FUEL PUMP
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace high pressure fuel pump. Refer to
EM-159, "Removal and Installation"
.
Component Inspection (High Pressure Fuel Pump Relay)
INFOID:0000000010703069
1.
CHECK HIGH PRESSURE FUEL PUMP RELAY
1.
Turn ignition switch OFF.
2.
Remove high pressure fuel pump relay. Refer to
ECM-14, "ENGINE CONTROL SYSTEM : Component
3.
Check the continuity between high pressure fuel pump relay ter-
minals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace high pressure fuel pump relay. Refer to
ECM-14, "ENGINE CONTROL SYSTEM : Com-
.
+
−
Condition
Continuity
High pressure fuel
pump relay
Terminal
3
5
12 V direct current supply between
terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
IGNITION SIGNAL
ECM-385
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
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ECM
N
P
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IGNITION SIGNAL
Component Function Check
INFOID:0000000010703070
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
2.
CHECK IGNITION SIGNAL FUNCTION-1
With CONSULT
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” with CONSULT.
2.
Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
3.
CHECK IGNITION SIGNAL FUNCTION-2
Without CONSULT
1.
Let engine idle.
2.
Read the voltage signal between ECM harness connector terminals with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
ECM-385, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010703071
1.
CHECK CONDENSER POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between condenser harness connector and ground.
Is the inspection result normal?
ECM
Voltage signal
+
−
Connector
Terminal
Connector
Terminal
F16
78
E57
128
82
86
90
JPBIA4733ZZ
+
−
Voltage
Condenser
Connector
Terminal
F200
1
Ground
Battery voltage
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