1999 NISSAN PRIMERA Electronic Repair Manual

Page 1905 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual Diagnostic Procedure 2: Models with relay
type 2
SYMPTOM: Blower motor does not rotate at all when the fan
speed is in AUTO. (It operates in 1, 2, 3, or
4-speed only.)
CHECK POWER SUPPLY FOR A/C
(LO)

Page 1906 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual pA
Note
Check circuit continuity between LO relay
harness terminal No.
p5and body ground.
OK
CHECK LO RELAY AFTER DISCON-
NECTING IT.
ENG
Replace LO relay.
Diagnostic Procedure 3: Models with relay
ty

Page 1907 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual pA
CHECK AUTO AMP.
Connect checking resistor.
(Refer to HA-30.)
Do approx.12 voltsexist between auto
amp. harness terminal No.
p15,p16
and body ground?
OK
ENG
Replace auto amp.
CHECK HIGH OR MED-HIGH,

Page 1908 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual Diagnostic Procedure 3: Models with relay
type 2
SYMPTOM: Blower motor fan speed does not change when
fan speed is in AUTO. (Fan speed is fixed in
HIGH or MED.)
C/R*1Note
CHECK AUTO AMP. AND PTC.
Conn

Page 1909 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual pA
CHECK AUTO AMP.
Connect checking resistor.
(Refer to HA-30.)
Do approx.12 voltsexist between auto
amp. harness terminal No.
p15,p16
and body ground?
OK
ENG
Replace auto amp.
CHECK HIGH OR MED-HIGH,

Page 1910 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual Diagnostic Procedure 4: Models with relay
type 1
SYMPTOM: Blower motor fan speed does not change when
fan speed is in AUTO. (Fan speed is fixed in
LOW.)
CHECK THERMAL TRANSMITTER.
Disconnect auto amp.

Page 1911 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual pA
CHECK POWER SUPPLY FOR AUTO
AMP.
Disconnect auto amp. harness connec-
tor.
Do approx.12 voltsexist between auto
amp. harness terminal No.
p1and
body ground?
OK
ENG
Check 10A fuse (No.26)
at fuse bl

Page 1912 of 2267

NISSAN PRIMERA 1999  Electronic Repair Manual Diagnostic Procedure 4: Models with relay
type 2
SYMPTOM: Blower motor fan speed does not change when
fan speed is in AUTO. (Fan speed is fixed in
LOW.)
CHECK THERMAL TRANSMITTER.
Disconnect auto amp.