Heater Control Assembly: Inspection

INSPECT ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal 8 and negative (-) lead to terminal 10 then check that the illuminations lights up.

If operation is not as specified, check the faulty bulb.

Fig 1: Checking Illumination Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT BULB
Using an ohmmeter, apply the tester as shown in the illustration to the test for continuity.

If continuity exists, replace the heater control.

If no continuity exists, replace the bulb.

Fig 2: Checking Bulb Continuity Using An Ohmmeter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT A/C INDICATOR OPERATION
1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminals 4 and 14.
2. Push the A/C button in and then check that the indicator lights up.
If operation is not as specified, replace the switch.

Fig 3: Inspecting A/C Indicator Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DIMMING OPERATION
1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminals 4 and 14 while pressing the switch.
2. Connect the positive (+) lead from battery to terminal 8 and then check that the indicator dims.
If operation is not as specified, replace the switch.

Fig 4: Inspecting Dimming Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT A/C SWITCH CONTINUITY

A/C SWITCH CONTINUITY TABLE

Switch condition	Tester connection	Specified condition
OFF	-	No continuity
ON	7-4	Continuity

Switch continuity:

If continuity is not as specified, replace the switch.

Illumination circuit:

If continuity is not as specified, replace the bulb.

Fig 5: Inspecting A/C Switch Continuity

G02632756

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT BLOWER SPEED CONTROL SWITCH CONTINUITY

BLOWER SPEED CONTROL SWITCH CONTINUITY TABLE

Switch condition	Tester connection	Specified condition
OFF	-	No continuity
LO	1-8	Continuity
M1	1-6-8	Continuity
M2	1-5-8	Continuity
HI	1-4-8	Continuity

If continuity is not as specified, replace the switch.

Fig 6: Inspecting Blower Speed Control Switch Continuity

G02632757

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT DEFROSTER MODE SWITCH CONTINUITY

DEFROSTER MODE SWITCH CONTINUITY TABLE

Switch condition	Tester connection	Specified condition
OFF	-	No continuity
ON	4-13	Continuity

If no continuity exists, replace the switch.

INSPECT REAR DEFOGGER SWITCH OPERATION (See INSPECTION )
INSPECT SECURITY INDICATOR LIGHT (See SECURITY INDICATOR LIGHT CIRCUIT )
INSPECT PASSENGER AIRBAG MANUAL ON-OFF INDICATOR OPERATION (See PASSENGER AIRBAG MANUAL ON-OFF SWITCH )

Fig 7: Inspecting Defroster Mode Switch Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002