Page 2625 of 3051
YHA349
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-34
Page 2626 of 3051
YHA350
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-35
Page 2627 of 3051
YHA351
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-36
Page 2628 of 3051
Models with Diesel EngineNLHA0128S0402
YHA352
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-37
Page 2629 of 3051
YHA353
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-38
Page 2630 of 3051
YHA354
TROUBLE DIAGNOSES
Wiring Diagram—A/C, M—(Cont’d)
HA-39
Page 2631 of 3051

How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NLHA0129WORK FLOWNLHA0129S01
SHA900E
*1: HA-41
SYMPTOM TABLENLHA0129S02
Symptom Reference page
+Intake door does not change.+Go to Trouble Diagnosis Procedure for Intake Door. HA-43
+Air outlet does not change.+Go to Trouble Diagnosis Procedure for mode door. HA-47
+Air mix door does not change.+Go to Trouble Diagnosis Procedure for Air mix door. HA-49
+Max hot door does not change.+Go to Trouble Diagnosis Procedure for Max Hot Door. HA-51
+Blower motor does not rotate at all.+Go to Trouble Diagnosis Procedure for Blower Motor. HA-55
+Magnet clutch does not engage when A/C switch and
fan switch are ON.+Go to Trouble Diagnosis Procedure for Magnet Clutch. HA-62
+Insufficient cooling.+Go to Trouble Diagnosis Procedure for Insufficient cool-
ing.HA-75
+Insufficient heating.+Go to Trouble Diagnosis Procedure for Insufficient
heating.HA-83
+Noise+Go to Trouble Diagnosis Procedure for Noise. HA-84
TROUBLE DIAGNOSES
How to Perform Trouble Diagnoses for Quick and Accurate Repair
HA-40
Page 2632 of 3051
Operational Check=NLHA0130The purpose of the operational check is to confirm that the system
operates properly.
CONDITIONS:NLHA0130S01+Engine running and at normal operating temperature.
NHA374
PROCEDURE:NLHA0130S021. Check BlowerNLHA0130S02011. Turn fan switch to 1-speed.
Blower should operate on 1-speed.
2. Then turn fan switch to 2-speed, and continue checking blower
speed until all speeds are checked.
3. Leave blower on 4-speed.
If NG, go to trouble diagnosis procedure for blower motor (HA-55).
If OK, continue with next check.
NHA375
2. Check Discharge AirNLHA0130S02021. Turn mode control knob to each position.
NHA376
2. Confirm that discharge air comes out according to the air dis-
tribution table at left.
Refer to“Discharge Air Flow”, HA-19.
If NG, go to trouble diagnosis procedure for mode door motor
(HA-47).
If OK, continue with next check.
TROUBLE DIAGNOSES
Operational Check
HA-41