Nissan Qashqai (2007-2010). Manual — part 176
P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-223
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
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P1124, P1126 THROTTLE CONTROL MOTOR RELAY
Description
INFOID:0000000001056445
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
DTC Logic
INFOID:0000000001056446
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.
Witch DTC is detected?
P1124 >> GO TO 2.
P1126 >> GO TO 3.
2.
PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P1124
1.
Turn ignition switch ON and wait at least 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
3.
PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P1126
1.
Turn ignition switch ON and wait at least 2 seconds.
2.
Start engine and let it idle for 5 seconds.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001056447
1.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Check voltage between ECM harness connector and ground.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1124
Throttle control motor
relay circuit short
ECM detect the throttle control motor relay is
stuck ON.
• Harness or connectors
(Throttle control motor relay circuit is
shorted)
• Throttle control motor relay
P1126
Throttle control motor
relay circuit open
ECM detects a voltage of power source for
throttle control motor is excessively low.
• Harness or connectors
(Throttle control motor relay circuit is
open)
• Throttle control motor relay
EC-224
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1124, P1126 THROTTLE CONTROL MOTOR RELAY
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F123, E6
• Harness for open or short between throttle motor relay and ECM
>> Repair open or short to ground or short to power in harness or connectors.
3.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect IPDM E/R harness connector E12.
4.
Check the continuity between ECM harness connector and IPDM E/R harness connector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F123, E6
• Harness for open or short between throttle motor relay and ECM
>> Repair open or short to ground or short to power in harness or connectors.
5.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1.
Reconnect ECM and IPDM E/R harness connectors.
2.
Turn ignition switch ON.
3.
Check voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 6.
6.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1.
Check the continuity between ECM harness connector and IPDM E/R harness connector.
ECM
Ground
Voltage
Connector
Terminal
F7
15
Ground
Battery voltage
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F7
15
E12
25
Existed
ECM
Ground
Voltage
Connector
Terminal
F7
2
Ground
Battery voltage
P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-225
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
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EC
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2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F12, E9
• Harness for open or short between throttle motor relay and ECM
>> Repair open or short to ground or short to power in harness or connectors.
8.
CHECK FUSE
1.
Disconnect 15A fuse (No. 51) from IPDM E/R.
2.
Check 15A fuse for blown.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace 15A fuse.
9.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace harness or connectors.
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F7
2
E12
32
Existed
EC-226
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1128 THROTTLE CONTROL MOTOR
P1128 THROTTLE CONTROL MOTOR
Description
INFOID:0000000001056453
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
DTC Logic
INFOID:0000000001056454
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 2 seconds.
2.
Start engine and let it idle for 5 seconds.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001056455
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E21. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect electric throttle control actuator harness connector.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1128
Throttle control motor
circuit short
ECM detects short in both circuits between
ECM and throttle control motor.
• Harness or connectors
(Throttle control motor circuit is shorted.)
• Electric throttle control actuator
(Throttle control motor)
Electric throttle control actuator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F29
5
F7
1
Not existed
4
Existed
6
1
Existed
4
Not existed
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