Infiniti QX56 (Z62). Manual - part 620

 

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Infiniti QX56 (Z62). Manual - part 620

 

 

EC-458

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

DTC Logic

INFOID:0000000006217960

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 8 V or more at idle.

Which DTC is detected?

P2100 >> GO TO 2.
P2103 >> GO TO 3.

2.

PERFORM DTC CONFIRMATION 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 DTC.

Is DTC detected?

YES

>> Go to 

EC-458, "Diagnosis Procedure"

.

NO

>> INSPECTION END

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2103

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-458, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217961

1.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector E15.

4.

Check the continuity between IPDM E/R harness connector and ECM harness connector.

5.

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

Is the inspection result normal?

YES

>> GO TO 3.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2100

ETC MOT PWR-B1
[Throttle control motor relay 
circuit open (bank 1)]

ECM detects that the voltage of power 
source for throttle control motor is ex-
cessively low.

• Harness or connectors

(Throttle control motor relay circuit is open)

• Throttle control motor relay

P2103

ETC MOT PWR
(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

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E15

60

E80

123

Existed

P2100, P2103 THROTTLE CONTROL MOTOR RELAY

EC-459

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and IPDM E/R
• Loose or poor connection for each connector and harness

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

3.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1.

Check the continuity between IPDM E/R sensor harness connector and ECM harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and IPDM E/R
• Loose or poor connection for each connector and harness

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

5.

CHECK FUSE

1.

Disconnect 20 A fuse (No. 64) from IPDM E/R.

2.

Check if 20 A fuse is blown.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace 20 A fuse.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E15

55

E80

173

Existed

EC-460

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

Description

INFOID:0000000006217962

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. ECM controls the throttle valve opening angle in response to driving condition via the throttle
control motor.

DTC Logic

INFOID:0000000006217963

DTC DETECTION LOGIC

NOTE:
• If DTC P2101 is displayed with DTC P2100, first perform the trouble diagnosis for DTC P2100. Refer

to 

EC-458, "DTC Logic"

.

• If DTC P2101 is displayed with DTC P2119, first perform the trouble diagnosis for DTC P2119. Refer

to 

EC-466, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 11 V or more at idle.

>> 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 

EC-460, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217964

1.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Check the voltage between ECM harness connector and ground under the following conditions.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 2.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2101

Electric throttle control 
performance

Electric throttle control function does not 
operate properly.

• Harness or connectors

(Throttle control motor circuit is open or shorted)

• Electric throttle control actuator

ECM

Ground

Condition

Voltage

Connector

Terminal

E80

173

Ground

Ignition switch: 
OFF

Approx. 0 V

Ignition switch: 
ON

Battery voltage

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-461

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector.

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 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and IPDM E/R
• Loose or poor connection for each connector and harness

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

4.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and IPDM E/R
• Loose or poor connection for each connector and harness

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

6.

CHECK FUSE

1.

Disconnect 20 A fuse (No. 64) from IPDM E/R.

2.

Check 20 A fuse for blown.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace 20 A fuse.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

8.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Turn ignition switch OFF.

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E15

60

E80

123

Existed

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E15

55

E80

173

Existed

 

 

 

 

 

 

 

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