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DI-591
DIAGNOSTICS - AIR CONDITIONING SYSTEM
DI3VZ-10
DTC 12 Ambient Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the ambient temperature and sends the appropriate signals to the A/C control assembly.
DTC No. Detection Item Trouble Area
S Ambient temperature sensor
S Harness or connector between ambient temperature sensor
12 Open or short in ambient temperature sensor circuit.
and A/C control assembly
S A/C control assembly
WIRING DIAGRAM
A/C Amplifier
19 3
B-L B-L
IG1 A30
TAM
2
A26
Ambient Temp.
Sensor
1
26 1
GR GR
IG1 A31
SG
I21900
2002 4RUNNER (RM887U)
Author : Date : 767
DI-592
DIAGNOSTICS - AIR CONDITIONING SYSTEM
INSPECTION PROCEDURE
1 Check voltage between terminals TAM and SG of A/C control assembly connec-
tor.
PREPARATION:
ON
(a) Remove A/C control assembly with connectors still con-
TAM(+)
nected (See page AC-84 ).
SG(-) (b) Turn ignition switch to ON.
CHECK:
Check voltage between terminals TAM and SG of A/C control
assembly connector at each temperature .
OK:
BE3840
I00319 I00334 Voltage
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