Nissan Frontier. Instruction - part 459

 

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Nissan Frontier. Instruction - part 459

 

 

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-407

< DTC/CIRCUIT DIAGNOSIS >

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P2100, P2103 THROTTLE CONTROL MOTOR RELAY

Component Description

INFOID:0000000009481104

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.

On Board Diagnosis Logic

INFOID:0000000009481105

These self-diagnoses have 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:0000000009481106

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.

PROCEDURE FOR DTC P2100

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 

EC-408, "Diagnosis Procedure"

.

With GST

Follow the procedure “With CONSULT” above.

PROCEDURE FOR DTC P2103

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8V.

With CONSULT

1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
3. If DTC is detected, go to 

EC-408, "Diagnosis Procedure"

.

With GST

Follow the procedure “With CONSULT” above.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2100
2100

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

P2103
2103

Throttle control motor 
relay circuit short

ECM detects 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-408

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

Diagnosis Procedure

INFOID:0000000009481107

1.

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 5.

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 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 4.

NG

>> GO TO 3.

3.

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.

4.

CHECK FUSE

1. Disconnect 20A fuse (No. 52).

2. Check 20A fuse for blown.
OK or NG

OK

>> GO TO 8.

NG

>> Replace 20A fuse.

5.

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 8.

NG

>> GO TO 6.

6.

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 2 and IPDM E/R terminal 6.

Refer to Wiring Diagram.

Voltage: Battery voltage

Continuity should exist.

Ignition switch

Voltage

OFF

Approximately 0V

ON

Battery voltage

(11 - 14V)

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-409

< DTC/CIRCUIT DIAGNOSIS >

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5. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

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.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

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.

Continuity should exist.

EC-410

< DTC/CIRCUIT DIAGNOSIS >

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P2101 ELECTRIC THROTTLE CONTROL FUNCTION

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

Description

INFOID:0000000009481108

NOTE:

If DTC P2101 is displayed with DTC P2100 or 2119, first perform the trouble diagnosis for DTC P2100

or P2119. Refer to 

EC-407

 or 

EC-416

.

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 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:0000000009481109

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

INFOID:0000000009481110

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11V when engine is run-

ning.

 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 

EC-410, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT” above.

Diagnosis Procedure

INFOID:0000000009481111

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 problem

Electric throttle control function does not 
operate 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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