Infiniti Q45. Manual - part 499

 

  Index      Infiniti     Infiniti Q45 - service repair manual 2006 year

 

Search            copyright infringement  

 

 

 

 

 

 

 



 

 

Content   ..  497  498  499  500   ..

 

 

Infiniti Q45. Manual - part 499

 

 

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-635

C

D

E

F

G

H

I

J

K

L

M

A

EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

NBS001ZS

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body.
Refer to 

EC-154, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

3

L

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

L/W

Throttle control motor 
(Close)

[Ignition switch: ON]

Engine stopped

Selector lever: D 

Accelerator pedal: Released

0 - 14V

5

L/B

Throttle control motor 
(Open)

[Ignition switch: ON]

Engine stopped

Selector lever: D 

Accelerator pedal: Fully depressed

0 - 14V

104

OR

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

PBIB1104E

PBIB1105E

PBIB2417E

EC-636

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

2. 

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

Check voltage between ECM terminal 3 and ground under the fol-
lowing conditions with CONSULT-II or tester.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 3.

3. 

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect throttle control motor relay harness connector.

3.

Check voltage between throttle control motor relay terminals 2, 3
and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

15A fuse

Harness for open or short between throttle control motor relay and battery

>> Repair or replace harness or connectors.

Ignition switch

Voltage

OFF

Approximately 0V

ON

Battery voltage

(11 - 14V)

MBIB0028E

PBIB0031E

Voltage: Battery voltage

PBIB0097E

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-637

C

D

E

F

G

H

I

J

K

L

M

A

EC

5. 

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1.

Disconnect ECM harness connector.

2.

Check continuity between ECM terminal 3 and throttle control motor relay terminal 5.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors E32, F32

Harness for open or short between ECM and throttle control motor relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

7. 

CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check continuity between ECM terminal 104 and throttle control motor relay terminal 1.
Refer to Wiring Diagram.

2.

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 E33, F33

Harness for open or short between ECM and throttle control motor relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

9. 

CHECK THROTTLE CONTROL MOTOR RELAY

Refer to 

EC-639, "Component Inspection"

 .

OK or NG

OK

>> GO TO 13.

NG

>> Replace throttle control motor relay.

Continuity should exist.

Continuity should exist.

EC-638

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION

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.

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.

12. 

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-639, "Component Inspection"

 .

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 14.

13. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR 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.

2.

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-78, "Idle Air Volume Learning"

 .

>> INSPECTION END

Electric throttle control 

actuator terminal

ECM terminal

Continuity

3

5

Should not exist

4

Should exist

6

5

Should exist

4

Should not exist

PBIB2420E

PBIB2439E

 

 

 

 

 

 

 

Content   ..  497  498  499  500   ..