Page 1921 of 2395
With Navigation SystemNBHA0097S0102
RHA882H
*1: HA-66
*2: HA-44
*3: HA-45
*4: HA-45
*5: HA-85*6: STEP-BY-STEP PROCEDURE
(HA-45), see No. 13.
*7: HA-78
*8: HA-90
*9: HA-98*10: HA-82
*11: MA-14
*12: LC-11
*13: LC-16
TROUBLE DIAGNOSES
Insufficient Heating (Cont'd)
HA-122
Page 1922 of 2395
Noise
TROUBLE DIAGNOSIS PROCEDURE FOR NOISE=NBHA0100SYMPTOM:
INoise
RHA883H
*1: HA-150
*2: HA-152*3: HA-146
*4: HA-66*5: MA-13
*6: MA-14
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Noise
HA-123
Page 1923 of 2395
Self-diagnosis
TROUBLE DIAGNOSIS PROCEDURE FOR SELF-DIAGNOSIS=NBHA0101SYMPTOM:
ISelf-diagnosis cannot be performed.
Inspection FlowNBHA0101S01Without Navigation SystemNBHA0101S0101
SHA250F
*1: HA-72
*2: HA-129
*3: HA-132*4: HA-135
*5: HA-139
*6: HA-141*7: HA-66
*8: HA-65
*9: HA-66
TROUBLE DIAGNOSES
Self-diagnosis
HA-124
Page 1924 of 2395
With Navigation SystemNBHA0101S0102
RHA884H
*1: HA-72
*2: HA-129
*3: HA-132
*4: HA-135*5: HA-139
*6: HA-141
*7: HA-66*8: HA-65
*9: HA-66
*10: HA-142
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-125
Page 1925 of 2395
Memory Function
TROUBLE DIAGNOSIS PROCEDURE FOR MEMORY FUNCTION=NBHA0102SYMPTOM:
IMemory function does not operate.
Inspection FlowNBHA0102S01Without Navigation SystemNBHA0102S0101
RHA885H
*1: HA-72 *2: HA-66 *3: HA-45
TROUBLE DIAGNOSES
Memory Function
HA-126
Page 1926 of 2395
With Navigation SystemNBHA0102S0102
RHA886H
*1: HA-72 *2: HA-66 *3: HA-45
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Memory Function (Cont'd)
HA-127
Page 1927 of 2395
ECON (ECONOMY) Mode
TROUBLE DIAGNOSIS PROCEDURE FOR ECON (ECONOMY) MODE=NBHA0103SYMPTOM:
IECON mode does not operate.
Inspection FlowNBHA0103S01Without Navigation SystemNBHA0103S0101
SHA920EA
*1: HA-72 *2: HA-66 *3: HA-45
TROUBLE DIAGNOSES
ECON (ECONOMY) Mode
HA-128
Page 1928 of 2395

With Navigation SystemNBHA0103S0102
RHA887H
*1: HA-72 *2: HA-66 *3: HA-45
RHA050G
Ambient Sensor Circuit
COMPONENT DESCRIPTIONNBHA0039The ambient sensor is attached in front of the driver's side con-
denser. It detects ambient temperature and converts it into a resis-
tance value which is then input into the auto amplifier.
AMBIENT TEMPERATURE INPUT PROCESSNBHA0040The automatic amplifier includes a ªprocessing circuitº for the ambi-
ent sensor input. However, when the temperature detected by the
ambient sensor increases quickly, the processing circuit retards the
auto amp. function. It only allows the auto amp. to recognize an
ambient temperature increase of 0.33ÉC (0.6ÉF) per 100 seconds.
As an example, consider stopping for a cup of coffee after high
speed driving. Although the actual ambient temperature has not
changed, the temperature detected by the ambient sensor will
increase. This is because the heat from the engine compartment
can radiate to the front grille area, location of the ambient sensor.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
ECON (ECONOMY) Mode (Cont'd)
HA-129