climate control TOYOTA RAV4 1996 Service Repair Manual

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REARVIEW MIRROR DEFOGGER TIMER OPERATION
Land Cruiser
1. Remove climate control (A/C-heater control) panel. Connect (backprobe) DVOM negative lead to
connector C9 terminal No. 22. Connect DVOM positive lead to connector C9 terminals No. 2 and 12, and
connector C7 terminal No. 8. See Fig. 12
. Turn ignition switch to ON position and measure voltage.
2. With defogger switch OFF, voltage should be about 12 volts. Turn defogger switch ON and ensure DEF
switch indicator is illuminated. Voltage should be less than one volt for about 15 minutes. After 15
minutes, defogger switch should turn off and voltage should be about 12 volts. Replace defogger switch i
f
voltage is not as specified is not as specified.
COMPONENT TESTS
DEFOGGER SWITCH TEST
1999 Avalon
1. If equipped with automatic A/C-heater system, backprobe defogger switch terminal No. 10 (Blue/Yellow
wire) with positive voltmeter lead and terminal No. 11 (White/Black wire) with negative lead. See Fig. 6
.
If equipped with manual A/C-heater system, backprobe defogger switch terminal No. 11 (Blue/Yellow
wire) with positive voltmeter lead and terminal No. 5 (White/Black wire) with negative lead. See Fig. 7
.
2. On all models, ensure battery voltage exists with defogger switch in OFF position. Turn defogger switch
to ON position. Ensure indicator light is on and less than one volt exists. After 15 minutes, defogger
switch should turn off and battery voltage should exist again. If defogger switch does not operate as
specified, replace switch.

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
Microsoft
Sunday, November 22, 2009 10:55:10 AMPage 9 © 2005 Mitchell Repair Information Company, LLC.

1. Disconnect defogger switch 4-pin connector. Check continuity between defogger switch terminals No. 3
and 4. See Fig. 11
. Continuity should exist with defogger switch in ON position.
2. Check continuity between terminals No. 2 and 3 (LED circuit). Continuity should exist. With defogger
switch in OFF position, continuity should not exist between any terminals. Replace switch if continuity is
not as specified.
Fig. 11: Identifying Defogger Switch Harness Connector Terminals (ECHO)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Land Cruiser
1. Remove climate control (A/C-heater control) panel. Connect (backprobe) DVOM negative lead to
connector C9 terminal No. 22. Connect DVOM positive lead to connector C9 terminals No. 2 and 12, and
connector C7 terminal No. 8. See Fig. 12
. Turn ignition switch to ON position and measure voltage.
2. With defogger switch OFF, voltage should be about 12 volts. Turn defogger switch ON and ensure DEF
switch indicator is illuminated. Voltage should be less than one volt for about 15 minutes. After 15
minutes, defogger switch should turn off and voltage should be about 12 volts. Replace defogger switch i
f
voltage is not as specified is not as specified.

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
Microsoft
Sunday, November 22, 2009 10:55:10 AMPage 15 © 2005 Mitchell Repair Information Company, LLC.