Infiniti QX4 (R50). Manual - part 46

2

CHECK INPUT SIGNAL

With CONSULT-II

1. Turn ignition switch to “ON” position.

(Do not start engine.)

2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “THRTL POS SEN”.

Voltage:

Fully-closed throttle:

Approximately 0.5 - 0.7V

Fully-open throttle:

Approximately 4V

SAT614J

Without CONSULT-II

1. Turn ignition switch to “ON” position.

(Do not start engine.)

2. Check voltage between TCM terminals 41 and 42 while accelerator pedal is depressed slowly.

Voltage:

Fully-closed throttle valve:

Approximately 0.5 - 0.7V

Fully-open throttle valve:

Approximately 4V

(Voltage rises gradually in response to throttle position.)

SAT513J

OK or NG

OK (With CONSULT-II)

©

GO TO 3.

OK (Without CONSULT-
II)

©

GO TO 4.

NG

©

Check harness for short or open between ECM and TCM regarding throttle position sen-
sor circuit. (Main harness)

GI

MA

EM

LC

EC

FE

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P1705 THROTTLE POSITION SENSOR

Diagnostic Procedure (Cont’d)

AT-181

3

CHECK THROTTLE POSITION SWITCH CIRCUIT (With CONSULT-II)

With CONSULT-II

1. Turn ignition switch to “ON” position.

(Do not start engine.)

2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Apply vacuum to the throttle opener, then check the following. Refer to steps 1 and 2 of “Preparation”, “TCM SELF-

DIAGNOSTIC PROCEDURE (No Tools)”, AT-46.

4. Read out “CLOSED THL/SW” and “W/O THRL/P-SW” depressing and releasing accelerator pedal.

Check the signal of throttle position switch is indicated properly.

MTBL0011

SAT646J

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 4.

4

DETECT MALFUNCTIONING ITEM

Check the following items:

I

Throttle position switch
Refer to “Component Inspection”, AT-184.

I

Harness for short or open between ignition switch and throttle position switch (Main harness)

I

Harness for short or open between throttle position switch and TCM (Main harness)

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

DTC P1705 THROTTLE POSITION SENSOR

Diagnostic Procedure (Cont’d)

AT-182

5

CHECK THROTTLE POSITION SWITCH CIRCUIT (Without CONSULT-II)

Without CONSULT-II

1. Turn ignition switch to “ON” position.

(Do not start engine.)

2. Check voltage between TCM terminals 16, 17 and ground while depressing, and releasing accelerator pedal slowly.

(after warming up engine)
[Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”, AT-46.]

MTBL0519

SAT526J

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 4.

6

CHECK DTC

Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-177.

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 7.

7

CHECK TCM INSPECTION

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

©

INSPECTION END

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P1705 THROTTLE POSITION SENSOR

Diagnostic Procedure (Cont’d)

AT-183

SAT132K

Component Inspection

NBAT0205

THROTTLE POSITION SWITCH

NBAT0205S01

Closed Throttle Position Switch (Idle position)

NBAT0205S0101

I

Check continuity between terminals 5 and 6.
[Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCE-
DURE (No Tools)”, AT-46.]

Accelerator pedal condition

Continuity

Released

Yes

Depressed

No

I

To adjust closed throttle position switch, refer to EC-154, “System
Description”.

SAT137K

Wide Open Throttle Position Switch

NBAT0205S0102

I

Check continuity between terminals 4 and 5.

Accelerator pedal condition

Continuity

Released

No

Depressed

Yes

DTC P1705 THROTTLE POSITION SENSOR

Component Inspection

AT-184