Nissan Pathfinder (2006 year). Manual — part 50

TROUBLE DIAGNOSIS

ATC-65

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ATC

2006 Pathfinder

COMPONENT DESCRIPTION
Air Mix Door Motors

The air mix door motor (passenger) (1) and the air mix door motor (driver) (2) are attached to the front heater
& cooling unit assembly. The air mix door motor (rear) is attached to the rear heater & cooling unit assembly.
These motors rotate so that the air mix door is opened or closed to a position set by the front (or rear) air con-
trol. Motor rotation is then conveyed through a shaft and the air mix door position is then fed back to the front
air control by the PBR built into the air mix door motors.

⇐

: Front

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (DRIVER)

1.

CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS

Is self-diagnosis code 22 is present. Refer to

ATC-51, "A/C System Self-diagnosis Function"

.

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

WJIA1978E

WJIA1979E

WJIA1245E

ATC-66

TROUBLE DIAGNOSIS

2006 Pathfinder

2.

CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR (DRIVER)

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector and air mix door motor
(driver) connector.

3.

Check continuity between front air control harness connector
M49 terminal 2 and 3 and air mix door motor (driver) harness
connector M147 terminal 5 and 6.

OK or NG

OK

>> Replace air mix door motor (driver). Refer to

ATC-145,

"FRONT AIR MIX DOOR MOTOR (PASSENGER)"

.

NG

>> Repair or replace harness as necessary.

3.

CHECK PBR REFERENCE SIGNAL VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (driver) connector.

3.

Turn ignition switch ON.

4.

Check voltage between air mix door motor (driver) harness con-
nector M147 terminal 3 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR (DRIVER) AND

FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (driver) harness
connector M147 terminal 3 and front air control harness connec-
tor M49 terminal 23.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT

AIR CONTROL"

.

NG

>> Repair or replace harness as necessary.

5.

CHECK PBR GROUND REFERENCE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (driver) harness
connector M147 terminal 1 and front air control harness connec-
tor M49 terminal 26.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness as necessary.

2 - 5

: Continuity should exist.

3 - 6

: Continuity should exist.

WJIA1092E

3 - Ground

: Approx. 5V

WJIA1246E

3 - 23

: Continuity should exist.

WJIA1093E

1 - 26

: Continuity should exist.

WJIA1247E

TROUBLE DIAGNOSIS

ATC-67

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ATC

2006 Pathfinder

6.

CHECK PBR FEEDBACK SIGNAL

1.

Reconnect the front air control connector and air mix door motor
(driver) connector.

2.

Turn ignition switch ON.

3.

Check voltage between front air control harness connector M49
terminal 22 and ground.

4.

Rotate driver temperature control dial through complete range.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT

AIR CONTROL"

.

NG

>> GO TO 7.

7.

CHECK PBR FEEDBACK CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (driver) connector and front
air control connector.

3.

Check continuity between air mix door motor (driver) harness
connector M147 terminal 2 and front air control harness connec-
tor M49 terminal 22.

OK or NG

OK

>> Replace air mix door motor (driver). Refer to

ATC-145,

"FRONT AIR MIX DOOR MOTOR (PASSENGER)"

.

NG

>> Repair or replace harness as necessary.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER)

1.

CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS

Self-diagnosis code 12 is present. Refer to

ATC-51, "A/C System Self-diagnosis Function"

.

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK POWER SUPPLY CIRCUIT FOR AIR MIX DOOR MOTOR (PASSENGER)

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector and air mix door motor
(passenger) connector.

3.

Check continuity between front air control harness connector
M49 terminal 15 and 16 and air mix door motor (passenger) har-
ness connector M143 terminal 6 and 5.

OK or NG

OK

>> Replace air mix door motor (passenger). Refer to

ATC-

145, "FRONT AIR MIX DOOR MOTOR (DRIVER)"

.

NG

>> Repair or replace harness as necessary.

22 - Ground

: Approx. 0V - 5V

WJIA1096E

2 - 22

Continuity should exist.

WJIA1248E

15 - 6

Continuity should exist.

16 - 5

Continuity should exist.

WJIA1097E

ATC-68

TROUBLE DIAGNOSIS

2006 Pathfinder

3.

CHECK PBR REFERENCE SIGNAL VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (passenger) connector.

3.

Turn ignition switch ON.

4.

Check voltage between air mix door motor (passenger) harness
connector M143 terminal 1 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR (PASSENGER) AND

FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (passenger) har-
ness connector M143 (B) terminal 1 and front air control harness
connector M49 (A) terminal 23.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT AIR CONTROL"

.

NG

>> Repair or replace harness as necessary.

5.

CHECK PBR GROUND REFERENCE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (passenger) har-
ness connector M143 (B) terminal 3 and front air control harness
connector M49 (A) terminal 26.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness as necessary.

Terminals

Condition

Voltage

(Approx.)

(+)

(-)

Air mix door motor

(passenger) con-

nector

Terminal No.

M143

1

Ground

Air mix door
(passenger)

5V

WJIA1682E

A

B

Connector

Terminal Connector

Terminal

Continuity

Front air control:

M49

23

Air mix door motor

(passenger):

M143

1

Yes

WJIA1656E

A

B

Connector

Terminal Connector

Terminal

Continuity

Front air control:

M49

26

Air mix door motor

(passenger):

M143

3

Yes

WJIA1650E

TROUBLE DIAGNOSIS

ATC-69

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ATC

2006 Pathfinder

6.

CHECK PBR FEEDBACK SIGNAL

1.

Reconnect the front air control connector and air mix door motor
(passenger) connector.

2.

Turn ignition switch ON.

3.

Check voltage between front air control harness connector M50
terminal 36 and ground.

4.

Rotate passenger temperature control dial through complete
range.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT

AIR CONTROL"

.

NG

>> GO TO 7.

7.

CHECK PBR FEEDBACK CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (passenger) connector and
front air control connector.

3.

Check continuity between air mix door motor (passenger) har-
ness connector M143 terminal 2 and front air control harness
connector M50 terminal 36.

OK or NG

OK

>> Replace air mix door motor (passenger). Refer to

ATC-

145, "FRONT AIR MIX DOOR MOTOR (DRIVER)"

.

NG

>> Repair or replace harness as necessary.

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR)

1.

CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS

Is self-diagnosis code 38 is present. Refer to

ATC-51, "A/C System Self-diagnosis Function"

.

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK POWER SUPPLY CIRCUIT FOR AIR MIX DOOR MOTOR (REAR)

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector and air mix door motor
(rear) connector.

3.

Check continuity between front air control harness connector
M49 terminal 17 and air mix door motor (rear) harness connec-
tor B155 terminal 6 and between front air control harness con-
nector M49 terminal 18 and air mix door motor (rear) harness
connector B155 terminal 1.

OK or NG

OK

>> Replace air mix door motor (rear). Refer to

ATC-146, "REAR AIR MIX DOOR MOTOR"

.

NG

>> Repair or replace harness as necessary.

36 - Ground

: Approx. 0 - 5V

WJIA1249E

2 - 36

: Continuity should exist.

WJIA1101E

17 - 6

Continuity should exist.

18 - 1

Continuity should exist.

WJIA1102E

ATC-70

TROUBLE DIAGNOSIS

2006 Pathfinder

3.

CHECK PBR REFERENCE SIGNAL VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (rear) connector.

3.

Turn ignition switch ON.

4.

Check voltage between air mix door motor (rear) harness con-
nector B155 terminal 3 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR (REAR) AND

FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (rear) harness con-
nector B155 terminal 3 and front air control harness connector
M49 terminal 23.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT

AIR CONTROL"

.

NG

>> Repair or replace harness as necessary.

5.

CHECK PBR GROUND REFERENCE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the front air control connector.

3.

Check continuity between air mix door motor (rear) harness con-
nector B155 terminal 2 and front air control harness connector
M49 terminal 26.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness as necessary.

6.

CHECK PBR FEEDBACK SIGNAL

1.

Reconnect the front air control connector and air mix door motor
(rear) connector.

2.

Turn ignition switch ON.

3.

Check voltage between front air control harness connector M49
terminal 25 and ground.

4.

Rotate rear temperature and mode control dial through complete
range.

OK or NG

OK

>> Replace front air control. Refer to

ATC-127, "FRONT

AIR CONTROL"

.

NG

>> GO TO 7.

3 - Ground

: Approx. 5V

LJIA0050E

3 - 23

Continuity should exist.

WJIA1103E

2 - 26

Continuity should exist.

WJIA1104E

25 - Ground

: Approx. 0 - 5V

WJIA1105E

TROUBLE DIAGNOSIS

ATC-71

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ATC

2006 Pathfinder

7.

CHECK PBR FEEDBACK CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the air mix door motor (rear) connector and front air
control connector.

3.

Check continuity between air mix door motor (rear) harness con-
nector B155 terminal 4 and front air control harness connector
M49 terminal 25.

OK or NG

OK

>> Replace air mix door motor (rear). Refer to

ATC-146,

"REAR AIR MIX DOOR MOTOR"

.

NG

>> Repair or replace harness as necessary.

4 - 25

Continuity should exist.

WJIA1106E

ATC-72

TROUBLE DIAGNOSIS

2006 Pathfinder

Intake Door Motor Circuit

EJS004P7

SYMPTOM:

●

Intake door does not change.

●

Intake door motor does not operate normally.

INSPECTION FLOW

*1

ATC-53, "Operational Check (Front)"

*2

ATC-51, "A/C System Self-diagno-
sis Function"

*3

ATC-52, "SELF-DIAGNOSIS CODE
CHART"

WJIA1053E