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AC-95
AIR CONDITIONING - HEATER CONTROL ASSEMBLY (Manual A/C)
AC3F7-01
INSPECTION
1. INSPECT ILLUMINATION OPERATION
16 15 Connect the positive (+) lead from the battery to terminal 15 and
negative (-) lead to terminal 16 then check that the illuminations
lights up.
If operation is not as specified, check the faulty bulb.
:Bulb
I21762
2. INSPECT BULB
Apply the tester as shown in the illustration to the test for conti-
nuity.
If continuity exists, replace the heater control.
If no continuity exists, replace the bulb.
I07872
3. INSPECT RECIRC INDICATOR OPERATION
OFF ON
25 7 2 (a) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 7, 25.
(b) Push the REC button in and then check that the indicator
lights up.
If operation is not as specified, replace the switch circuit board.
I21765
4. INSPECT DIMMING OPERATION
OFF ON
(a) Connect the positive (+) lead from the battery to terminal
25 7 15 2
2 and the negative (-) lead to terminal 7, 25 while press
the switch.
(b) Push the REC button in and then check that the indicator
lights up.
(c) Connect the positive (+) lead from the battery to terminal
15 and then check that the indicator dims.
I21766 If operation is not as specified, replace the switch circuit board.
5. INSPECT A/C INDICATOR OPERATION
OFF ON
25 10 2 (a) Connect the positive (+) lead from the battery to terminal
2 and negative (-) lead to terminal 10, 25.
(b) Push the A/C button in and then check that the indicator
lights up.
If operation is not as specified, replace the switch circuit board.
I21763
2002 4RUNNER (RM887U)
Author : Date : 1864
AC-96
AIR CONDITIONING - HEATER CONTROL ASSEMBLY (Manual A/C)
6. INSPECT DIMMING OPERATION
OFF ON
25 (a) Connect the positive (+) lead from the battery to terminal
10 15 2
2 and negative (-) lead to terminal 10, 25 while press the
switch.
(b) Push the A/C button in and then check that the indicator
lights up.
(c) Connect the positive (+) lead from the battery to terminal
20 and then check that the indicator dims.
I21764 If operation is not as specified, replace the switch circuit board.
A/C Switch
7. INSPECT SWITCH CONTINUITY
RECIRC Switch
Check the continuity between terminals while switch is pressed,
9 7 as shown in the chart.
Switch Tester connection Specified condition
A/C 9 - 25 Continuity
RECIRC 7 - 25 Continuity
25
I21767
8. INSPECT TEMPERATURE CONTROL SWITCH OP-
WARM ERATION
COOL
(a) Check that the resistance between terminals 11 and 13
11 is approx. 3.0 k.
(b) Connect the positive (+) lead from the three 1.5 V dry cell
batteries to terminal 11 and negative (-) lead to terminal
13 13.
12
(c) Connect the positive (+) lead from the tester to terminal
3 Dry Cell Batteries I21769 12 and negative (-) lead to terminal 13.
(d) Gradually turn the switch from "MAX. WARM" side to
"MAX. COOL" side and check that the voltage increase
from 0 to 4.5 V.
If operation is not as specified, replace the heater control base.
2002 4RUNNER (RM887U)
Author : Date : 1865
AC-97
AIR CONDITIONING - HEATER CONTROL ASSEMBLY (Manual A/C)
9. INSPECT BLOWER SPEED CONTROL SWITCH OP-
M1 M2 ERATION
Check the continuity between terminals at each switch position
as shown in the chart.
3 2 1
Position/ Circuit Tester connection Specified condition
8 7 6 5 4
OFF - No continuity
LO 1-8 Continuity
M1 1-6-8 Continuity
I21768
M2 1-5-8 Continuity
HI 1-4-8 Continuity
If continuity is not as specified, replace the heater control base.
10. INSPECT MODE SWITCH CONTINUITY
Check the continuity between terminals at each switch position
20 18 as shown in the chart.
Switch position Tester connection Specified condition
FACE 17 - 25 Continuity
B/L 18 - 25 Continuity
21 19 17 FOOT 19 - 25 Continuity
25
FOOT/DEF. 20 - 25 Continuity
I21770
DEF. 21 - 25 Continuity
If continuity is not as specified, replace the switch.
2002 4RUNNER (RM887U)
Author : Date : 1866
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