Nissan Frontier. Instruction — part 685
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
EC-1311
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Component Description
INFOID:0000000009481979
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is controlled ON/OFF 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.
On Board Diagnosis Logic
INFOID:0000000009481980
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MlL illuminates.
DTC Confirmation Procedure
INFOID:0000000009481981
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR DTC P2100
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check 1st trip DTC.
4. If DTC is detected, go to
EC-1311, "Diagnosis Procedure"
.
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.
1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
3. If DTC is detected, go to
EC-1311, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000009481982
1.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2100
2100
Throttle control motor
relay circuit open
ECM detects that the 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
P2103
2103
Throttle control motor
relay circuit short
ECM detects that the throttle control motor relay
is stuck ON.
• Harness or connectors
(Throttle control motor relay circuit is
shorted)
• Throttle control motor relay
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.
EC-1312
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2. Check voltage between ECM terminal 104 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check continuity between ECM terminal 104 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 3.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK FUSE
1. Disconnect 20A fuse (No.52).
2. Check if 20 A fuse is blown.
OK or NG
OK
>> GO TO 7.
NG
>> Replace 20A fuse.
4.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1. Check voltage between ECM terminal 3 and ground under the
following conditions with CONSULT or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 5.
5.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E119.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 6.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
Voltage: Battery voltage
PBIB1171E
Continuity should exist.
Ignition switch
Voltage
OFF
Approximately 0V
ON
Battery voltage
(11 - 14V)
MBIB0028E
Continuity should exist.
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
EC-1313
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
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.
EC-1314
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Description
INFOID:0000000009481983
NOTE:
If DTC P2101 is displayed with DTC P2100 or P2119, first perform the trouble diagnosis for DTC P2100
or P2119. Refer to
.
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
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.The throttle position
sensor provides feedback to the ECM, when opens/closes the throttle valve in response to driving conditions
via the throttle control motor.
On Board Diagnosis Logic
INFOID:0000000009481984
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 illuminates.
DTC Confirmation Procedure
INFOID:0000000009481985
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V when the
engine is running.
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
EC-1314, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000009481986
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2101
2101
Electric throttle control
performance
Electric throttle control function does not oper-
ate properly.
• Harness or connectors
(Throttle control motor circuit is open or
shorted)
• Electric throttle control actuator
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.
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