Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 327 / 1976

I20989
TR
SG
(-) (+)
ON
I08309
2 1
- DIAGNOSTICS AIR CONDITIONING SYSTEM
DI-713
867
Author: Date:
2001 SIENNA (RM787U)
INSPECTION PROCEDURE
1 Check voltage between terminals TR and SG of A/C control assembly connector.
PREPARATION:
Remove A/C control assembly with connectors still connected.
CHECK:
(a)
Turn ignition switch ON.
(b) Measure voltage between terminals TR and SG of A/C
control assembly connector at each temperature.
OK:
Voltage :
at 25
°
C (77
°
F) : 1.8 - 2.2 V
at 40
°
C (104
°
F) : 1.2 - 1.6 V
HINT:
As the temperature increases, the voltage decreases.
NG Go to step 3.
OK
Proceed to next circuit inspection shown on problem symptoms table (See page DI-697 ). Howev-
er, if DTC19 is displayed, check and replace A/C control assembly.
2 Check rear room temperature sensor.
PREPARATION:
Disconnect rear room temperature sensor connector.
CHECK:
Measure resistance between terminals 1 and 2 of room temper-
ature sensor connector at each temperature.
OK:
Resistance :
at 25
°
C (77
°
F) : 1.65 - 1.75 k
Ω
at 50
°
C (122
°
F) : 0.55 - 0.65 k
Ω
HINT:
As the temperature increases, the resistance decreases.
NG Replace rear room temperature sensor.
OK