Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2010MATRIX FWD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYTESTING AND INSPECTION
2010 Toyota Matrix FWD L4-2.4L (2AZ-FE)
Control Assembly: Testing and Inspection
2010 Toyota Matrix FWD L4-2.4L (2AZ-FE)SECTION Testing and Inspection
HEATING / AIR CONDITIONING: AIR CONDITIONING PANEL: INSPECTION
1. INSPECT NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH)
(a) Disconnect the connector from the No. 1 heater control (air inlet control switch).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Check that the indicator light comes on.
(1) Turn the No. 1 heater control (air inlet control switch) to LOCK.
(2) Connect a positive (+) lead from the battery to terminal 2 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.
OK:
The indicator light comes on.
(d) Check that the illumination comes on.
(1) Connect a positive (+) lead from the battery to terminal 7 and negative (-) to terminal 6, and check that the illumination comes on.
OK:
The illumination comes on.
(2) If the result is not as specified, replace the No. 1 heater control (air inlet control switch).
2. INSPECT NO. 2 HEATER CONTROL (BLOWER SWITCH)
(a) Disconnect the connector from the No. 2 heater control (blower switch).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) If the resistance is not as specified, replace the No. 2 heater control (blower switch).
3. INSPECT NO. 3 HEATER CONTROL
(a) Disconnect the connector from the No. 3 heater control.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
HINT
*1: w/ PTC heater
(c) Check that the indicator light comes on.
(1) Connect a positive (+) lead from the battery to terminal 3 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.
OK:
The indicator light comes on.
(d) Check that the illumination comes on.
(1) Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 6, and check that the illumination comes on.
OK:
The illumination comes on.
(2) If the result is not as specified, replace the No. 3 heater control.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.