Nissan Qashqai J11. Manual — part 236
ECH-242
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION
P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION
DTC Logic
INFOID:0000000010379135
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
Turn ignition switch OFF and wait at least 12 minutes.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and run engine at idle speed for at least 10 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECH-242, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010379136
1.
CHECK ECM HARNESS CONNECTOR CONNECTION
1.
Turn ignition switch OFF.
2.
Check ECM connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR HARNESS CONNECTOR CONNECTION
Check electric throttle control actuator harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR POWER SUPPLY CIRCUIT-1
1.
Disconnect electric throttle control actuator harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between electric throttle control actuator harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 8.
4.
CHECK THROTTLE POSITION SENSOR CIRCUIT
1.
Turn ignition switch OFF.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0638
THROTTLE ACTUATOR B1
(Throttle actuator control
range/performance bank 1)
The value of electric throttle control actuator
does not change.
Electric throttle control actuator
Electric throttle control actuator
Voltage
(Approx.)
Connector
+
-
Terminal
Terminal
F46
5
3
5.0 V
P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION
ECH-243
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
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2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK THROTTLE POSITION SENSOR
ECH-244, "Component Inspection (Throttle Position Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK THROTTLE CONTROL MOTOR CIRCUIT
1.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK THROTTLE CONTROL MOTOR
ECH-244, "Component Inspection (Throttle Control Motor)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
8.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR POWER SUPPLY CIRCUIT-2
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
Sensor
Electric throttle control actu-
ator
ECM
Continuity
Connector
Terminal
Connector
Terminal
Sensor 1
F46
6
F17
87
Existed
Sensor 2
F46
4
F17
82
Existed
Electric throttle control actu-
ator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F46
1
F18
132
Existed
F46
2
F18
136
Existed
Electric throttle control actu-
ator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F46
5
F17
65
Existed
ECH-244
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION
NO
>> Repair or replace error-detected parts.
9.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR GROUND CIRCUIT
1.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
Component Inspection (Throttle Position Sensor)
INFOID:0000000010379137
1.
CHECK THROTTLE POSITION SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
4.
Turn ignition switch ON.
5.
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator.
2.
Proceed to
>> INSPECTION END
Component Inspection (Throttle Control Motor)
INFOID:0000000010379138
1.
CHECK THROTTLE CONTROL MOTOR
1.
Reconnect all harness connectors disconnected.
2.
Check resistance between electric throttle control actuator harness connectors terminals under the follow-
ing conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
Electric throttle control actu-
ator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F46
3
F17
90
Existed
ECM
Condition
Voltage
Connector
+
–
Terminal
Terminal
F17
87
(TP sensor 1)
90
Accelerator pedal: Fully released
0.425 V
Accelerator pedal: Fully depressed
4.760 V
82
(TP sensor 2)
Accelerator pedal: Fully released
0.425 V
Accelerator pedal: Fully depressed
4.760 V
Terminal
Resistance
1 and 2
Approx. 1 - 1.5
Ω
P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION
ECH-245
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
C
D
E
F
G
H
I
J
K
L
M
A
ECH
N
P
O
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator.
2.
>> INSPECTION END
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