Nissan Frontier D22. Manual - part 69

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

AT-245

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

*1: These terminals are connected to the ECM.
*2: These terminals are connected to the Data link connector for CONSULT-II.
*3: VG33ER only.

40

G/B

Vehicle speed 
sensor

When moving vehicle at 2 to 3 km/h 
(1 to 2 MPH) for 1m (3 ft) or more.

Voltage varies 
between less 
than 1V and 
more than 4.5V

41

OR/L

Throttle position 
sensor

When depressing accelerator pedal 
slowly after warming up engine (Volt-
age rises gradually in response to 
throttle position).

Fully-closed 
throttle:

0.5V - 0.7V

Fully-open throt-
tle:

4V

42

BR

Throttle position 
sensor (Ground)

—

0V

45*3

BR/R

Stop lamp switch

—

When brake pedal is depressed.

Battery voltage

When brake pedal is released.

0V

47

R/B

A/T fluid tempera-
ture sensor

When ATF temperature is 20

°C 

(68

°F).

1.5V

When ATF temperature is 80

°C 

(176

°F).

0.5V

48

B/Y

Ground (Same as 
No. 25)

—

—

0V

Termi-

nal No.

Wire color

Item

Condition

Judgement stan-

dard (Approx.)

AT-246

[RE4R01A]

TROUBLE DIAGNOSIS FOR POWER SUPPLY

TROUBLE DIAGNOSIS FOR POWER SUPPLY

PFP:00000

Wiring Diagram — AT — MAIN

ECS007M2

WCWA0146E

TROUBLE DIAGNOSIS FOR POWER SUPPLY

AT-247

[RE4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

TCM TERMINALS AND REFERENCE VALUE

Remarks: Specification data are reference values.

Diagnostic Procedure

ECS007M3

1. 

CHECK TCM POWER SOURCE

1.

Turn ignition switch to ON position.
(Do not start engine.)

2.

Check voltage between TCM harness connectors M77, M78 ter-
minals (10, 19, 28) and ground.

3.

Turn ignition switch to OFF position.

4.

Check voltage between TCM harness connector M78 terminal
28 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following items:

●

Harness for open or short between fuse block J/B harness connectors M26, M27 and TCM har-
ness connectors M77, M78

●

Ignition switch and fuse
Refer to 

PG-9, "POWER SUPPLY ROUTING"

 .

Terminal 

No.

Wire color

Item

Condition

Judgement stan-

dard (Approx.)

10

W/R

Power source

or

When turning ignition switch to ON

Battery voltage

When turning ignition switch to OFF

0V

19

W/R

Power source 
(Same as No. 10)

Same as No. 10

25

B/Y

Ground

or

When turning ignition switch to ON

0V

When turning ignition switch to OFF

0V

28

R/Y

Power source
(Memory back-
up)

When turning ignition switch to OFF

Battery voltage

When turning ignition switch to ON

Battery voltage

48

B/Y

Ground (Same 
as No. 25)

When turning ignition switch to ON

0V

When turning ignition switch to OFF

0V

Voltage

: Battery voltage

Voltage

: Battery voltage

AAT476A

AT-248

[RE4R01A]

TROUBLE DIAGNOSIS FOR POWER SUPPLY

2. 

CHECK TCM GROUND CIRCUIT

1.

Turn ignition switch to OFF position.

2.

Disconnect TCM harness connector.

3.

Check continuity between TCM harness connector M78 termi-
nals (25, 48) and ground.

If OK, check harness for short to ground and short to power.

OK or NG

OK

>> INSPECTION END.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Continuity should exist.

AAT477A