Nissan Frontier. Manual — part 460
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-411
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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2. Loosen and retighten two ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
Check voltage between ECM terminal 2 and ground under the following conditions with CONSULT or tester.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 3.
3.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 15 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 4.
4.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check harness continuity between ECM terminal 15 and IPDM E/R terminal 47.
Refer to Wiring Diagram.
4. 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 E5, F14
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK FUSE
1. Disconnect 20A fuse (No. 52).
BBIA0614E
Ignition switch
Voltage
OFF
Approximately 0V
ON
Battery voltage
(11 - 14V)
Voltage: Battery voltage
Continuity should exist.
EC-412
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
2. Check 20A fuse for blown.
OK or NG
OK
>> GO TO 9.
NG
>> Replace 20A fuse.
7.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E119.
3. Check continuity between ECM terminal 2 and IPDM E/R terminal 6.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
OK or NG
OK
>> Replace IPDM E/R. Refer to
PCS-28, "Removal and Installation of IPDM E/R"
.
NG
>> Repair or replace harness or connectors.
10.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 11.
NG
>> Repair or replace.
11.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
Continuity should exist.
Electric throttle control
actuator terminal
ECM terminal
Continuity
5
5
Should not exist
6
Should exist
6
5
Should exist
6
Should not exist
BBIA0623E
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-413
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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2. Check if foreign matter is caught between the throttle valve and
the housing.
OK or NG
OK
>> GO TO 12.
NG
>> Remove the foreign matter and clean the electric throttle
control actuator inside, and then perform throttle valve
closed position learning. Refer to
Valve Closed Position Learning"
12.
CHECK THROTTLE CONTROL MOTOR
EC-413, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> GO TO 14.
13.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
OK or NG
OK
>> GO TO 14.
NG
>> Repair or replace harness or connectors.
14.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator. Refer to
2. Perform
EC-123, "Throttle Valve Closed Position Learning"
3. Perform
EC-124, "Idle Air Volume Learning"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009481112
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
2. Check resistance between terminals 5 and 6.
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform
EC-123, "Throttle Valve Closed Position Learning"
5. Perform
EC-124, "Idle Air Volume Learning"
.
BBIA0623E
Resistance: Approximately 1 - 15
Ω [at 25 °C (77°F)]
PBIB2606E
EC-414
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2118 THROTTLE CONTROL MOTOR
P2118 THROTTLE CONTROL MOTOR
Component Description
INFOID:0000000009481113
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.
On Board Diagnosis Logic
INFOID:0000000009481114
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
INFOID:0000000009481115
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481116
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2118
2118
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)
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
BBIA0614E
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