Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Micra 2003-2006 Approved sma ATC-001

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ATC-001

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TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Wiring Diagram --A/C-- CR Engine Models

To ESM

MJWA0061E

ATC-1
TROUBLE DIAGNOSIS

MJWA0062E

ATC-2
TROUBLE DIAGNOSIS

MJWA0111E

ATC-3
TROUBLE DIAGNOSIS

MJWA0064E

Blower Motor System
Symptom: Operation malfunction of blower motor
To ESM

ATC-4
TROUBLE DIAGNOSIS

1. CHECK POWER SUPPLY CIRCUIT (BLOWER MOTOR)
Turn ignition switch ON, and check voltage between blower motor
terminal 1 and ground.
Connector terminal Voltage
Blower motor
Ground Battery voltage
1
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 15A fuses [Nos. 9 and
10, located in the fuse block (J/B)]. Refer to PG-4, MJIB0124E
"POWER SUPPLY ROUTING" on ESM.
q If OK, check for open circuit in wiring harness. Repair or replace as necessary.

q If NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.

2. CHECK POWER SUPPLY CIRCUIT (A/C AUTO AMP.)
1. Disconnect A/C auto amp. connector.
2. Turn ignition switch ON, and check voltage between A/C auto
amp. terminal 8 and ground.

Connector terminal Voltage
A/C auto amp.
Ground Battery voltage
8
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
MJIA0230E

3. CHECK POWER SUPPLY CIRCUIT (FAN CONTROL AMP.)
1. Disconnect the fan control amp. connector.
2. Turn ignition switch ON, and check voltage between fan control
amp. terminal 1, 5 and ground.

Connector terminal
Voltage
Fan control amp.
1 Ground
Battery voltage
5
OK or NG
OK >> GO TO 4.
MJIA0100E
NG >> q Between terminal 1 and ground: Repair the harness
or connector.
q Between terminal 5 and ground: GO TO 7.

ATC-5
TROUBLE DIAGNOSIS

4. CHECK BLOWER MOTOR FEEDBACK SIGNAL
Turn ignition switch ON, and check voltage between A/C auto amp.
terminal 9 and ground.
Connector terminal Voltage
A/C auto amp.
Ground Approx. 12V
9
OK or NG
OK >> GO TO 5.
NG >> GO TO 9.
MJIA0231E

5. CHECK GROUND CIRCUIT
Check continuity between fan control amp. terminal 2 and ground.
Connector terminal Continuity
Fan control amp.
Ground Yes
2
Does continuity exist?
YES >> GO TO 6.
NO >> Repair harness or connector.

MJIA0102E

6. CHECK 1: FAN CONTROL AMP. CONTROL SIGNAL
Check waveform between fan control amp. terminal 3 and ground.

MJIA0103E

OK or NG
OK >> Replace the fan control amp.
NG >> q Fan speed is stuck at speed 4: GO TO 11.
q Fan speed is stuck at speed 1: GO TO 12.

ATC-6
TROUBLE DIAGNOSIS

7. CHECK BLOWER MOTOR
1. Remove the blower motor.
2. Check continuity between blower motor terminal 1 and terminal
2.

Connector terminal Continuity
Blower motor
Yes
1 2
Does continuity exist?
YES >> GO TO 8.
MJIB0121E
NO >> Replace the blower motor.

8. CHECK CIRCUIT CONTINUITY
1. Disconnect the blower motor and fan control amp. connectors.
2. Check continuity between the blower motor terminal 2 and fan
control amp. terminal 5.

Connector terminal
Continuity
Blower motor Fan control amp.
2 5 Yes
Does continuity exist?
YES >> End of trouble diagnosis
MJIB0122E
NO >> Repair harness or connector.

9. CHECK CIRCUIT CONTINUITY
1. Disconnect the fan control amp. and A/C auto amp. connectors.
2. Check continuity between fan control amp. terminal 4 and A/C
auto amp. terminal 9.

Connector terminal
Continuity
Fan control amp. A/C auto amp.
4 9 Yes
Does continuity exist?
YES >> GO TO 10.
MJIA0234E
NO >> Repair harness or connector.

10. CHECK FAN CONTROL AMP.
Check continuity between fan control amp. terminals 4 and 5.
Connector terminal
Continuity
Fan control amp.
4 5 Yes
Does continuity exist?
YES >> End of trouble diagnosis
NO >> Replace the fan control amp.

MJIA0235E

ATC-7
TROUBLE DIAGNOSIS

11. CHECK CIRCUIT CONTINUITY
1. Disconnect the fan control amp. and A/C auto amp. connectors.
2. Check continuity between fan control amp. terminal 3 and A/C
auto amp. terminal 10.

Connector terminal
Continuity
Fan control amp. A/C auto amp.
3 10 Yes
Does continuity exist?
YES >> Replace the fan control amp.
MJIA0236E
NO >> Repair harness or connector.

12. CHECK 2: FAN CONTROL AMP. CONTROL SIGNAL
1. Disconnect the A/C auto amp. connector.
2. Turn ignition switch ON, and check voltage between A/C auto
amp. terminal 10 and ground.

Connector terminal Condition Voltage
A/C auto amp. Fan speed
Battery volt-
Ground : Speed 1 through
10 age
Speed 3
OK or NG
OK >> Replace A/C auto amp. MJIA0237E

NG >> Replace the fan control amp.

ATC-8

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