Page 2449 of 2898
BLOWER MOTOR CIRCUIT=NJHA0147SYMPTOM:
+Blower motor does not rotate.
Symptom
table No.INCIDENT
1 Fan fails to rotate.
2 Fan does not rotate at 1-speed.
3 Fan does not rotate at 2-speed.
4 Fan does not rotate at 3-speed.
5 Fan does not rotate at 4-speed.
1 DIAGNOSTIC PROCEDURE
Check if blower motor rotates properly at each fan speed.
Conduct checks as per symptom table at above.
1©GO TO 2.
2, 3, 4©GO TO 8.
5©GO TO 10.
2 CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor harness connector.
2. Do approx. 12 volts exist between blower motor harness terminal No. 1 and body ground?
RHA343FD
YesorNo
Ye s©GO TO 3.
No©Check 15A (Nos. 14 and 16) fuses at fuse block. Refer to Sedan: EL-11 (QG), EL-19
(YD), Hatchback: EL-28, ªWiring Diagram Ð POWER к.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-49
Page 2450 of 2898
3 CHECK CIRCUIT CONTINUITY FOR BLOWER MOTOR
1. Turn fan control knob to any position except OFF.
2. Check circuit continuity between blower motor harness terminal No. 2 and body ground.
RHA344FD
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 4.
NG©Reconnect blower motor harness connector. GO TO 5.
4 CHECK BLOWER MOTOR
(Refer to Electrical Components Inspection.)
(HA-54)
OK or NG
OK©INSPECTION END
NG©Replace blower motor.
5 CHECK BLOWER MOTOR CIRCUIT BETWEEN BLOWER MOTOR AND RESISTOR
Do approx. 12 volts exist between fan resistor harness terminal No. 1 and body ground?
RHA699HA
YesorNo
Ye s©Disconnect fan switch harness connector. GO TO 7.
No©Disconnect blower motor and resistor harness connectors. GO TO 6.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-50
Page 2451 of 2898
6 CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND RESISTOR
Check circuit continuity between blower motor harness terminal No. 2 and fan resistor harness terminal No. 1.
RHA700HA
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Poor contact between the resistor and blower motor connector.
NG©Repair harness or connector.
7 CHECK GROUND CIRCUIT FOR HEATER CONTROL PANEL
Check circuit continuity between fan switch harness terminal No. 9 or 13 and body ground.
RHA849H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 8.
NG©Repair harness or connector.
8 CHECK RESISTOR AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-54)
OK or NG
OK©GO TO 9.
NG©Replace resistor.
9 CHECK RESISTOR HARNESS CONNECTOR
Reconnect resistor harness connector.
OK or NG
1©GO TO 12.
2, 3, 4©GO TO 10.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-51
Page 2452 of 2898
10 CHECK FAN SWITCH CIRCUIT
Do approx. 12 volts exist between each fan switch harness terminal and body ground?
RHA850H
YesorNo
Ye s©GO TO 13.
No©GO TO 11.
11 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND RESISTOR
Check circuit continuity between heater control panel harness terminals and fan resistor harness terminals.
RHA851H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 12.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-52
Page 2453 of 2898
12 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND BLOWER MOTOR
Check circuit continuity between heater control panel harness terminal No. 13 or 17 and blower motor harness terminal
No. 2.
RHA852H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 13.
NG©Repair harness or connector.
13 CHECK FAN SWITCH AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-54)
OK or NG
OK©INSPECTION END
NG©Replace fan switch.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-53
Page 2454 of 2898
NHA386
ELECTRICAL COMPONENTS INSPECTION=NJHA0146Fan SwitchNJHA0146S01Check continuity between terminals at each switch position.
KNOB POSITION Continuity between terminals
OFF No continuity
1 13Ð14Ð18
2 13Ð15Ð18
3 13Ð16Ð18
4 13Ð17Ð18
Blower MotorNJHA0146S02Confirm smooth rotation of the blower motor.
+Ensure that there are no foreign particles inside the intake unit.
RHA706H
Blower ResistorNJHA0146S03Check resistance between terminals.
Terminal No. Resistance
(+) (þ)LHD models for
EuropeExcept LHD mod-
els for Europe
4
1Approx. 2.4 - 2.8W
3Approx. 0.58 -
0.7WApprox. 1.2 - 1.4W
2Approx. 0.22 -
0.26WApprox. 0.43 -
0.51W
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-54
Page 2455 of 2898
Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH=NJHA0155SYMPTOM:
+Magnet clutch does not operate when A/C switch and fan switch are ON.
INSPECTION FLOW
NHA387
*1: HA-93
*2: HA-56*3: HA-34
*4: HA-33*5: EM-16 (QG),
EM-85 (YD)
TROUBLE DIAGNOSES
Magnet Clutch
HA-55
Page 2456 of 2898
MAGNET CLUTCH CIRCUIT (FOR QG ENGINE)=NJHA0156SYMPTOM:
+Magnet clutch does not engage when A/C switch and fan
switch are ON.
1 CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
Do approx. 12 volts exist between compressor harness terminal No. 1 and body ground?
RHA794H
YesorNo
Ye s©GO TO 2.
No©Disconnect A/C relay. GO TO 3.
2 CHECK MAGNET CLUTCH COIL
OK or NG
NG©Replace magnet clutch. Refer to HA-85.
3 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR HARNESS
Check circuit continuity between A/C relay harness terminal No. 3 and compressor harness terminal No. 1.
RHA634H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 4.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-56