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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2001LANDCRUISER V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYTESTING AND INSPECTIONREAR CONTROL ASSEMBLYOPERATION
2001 Toyota Landcruiser V8-4.7L (2UZ-FE)
Operation
2001 Toyota Landcruiser V8-4.7L (2UZ-FE)SECTION Operation
INSPECTION
1. REMOVE REAR HEATER CONTROL ASSEMBLY
Using a screwdriver, release the 4 claws and pull out the rear heater control assembly, then disconnect the connector.
2. INSPECT ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 21 then check that the illumination light up.
If operation is not as specified, replace the heater control assembly.
3. INSPECT INDICATOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the indicator lights up, as shown in the chart.
If operation is not as specified, replace the heater control assembly.
b. Connect the positive (+) lead from the battery to terminal 2, then check that indicators dim.
If operation is not as specified, replace the heater control assembly.
4. INSPECT SWITCH CONTINUITY
Check the continuity between terminals while switch is pressed, as shown in the chart.
If continuity is not as specified, replace the heater control assembly.
5. INSPECT VARIABLE RESISTOR OPERATION
a. Measure resistance between terminals 10 and 12. Standard resistance: 3.0 kohm
b. Gradually move the temperature control lever from "COOL" side to "WARM" side then check that the resistance between terminals 11 and 12 increase from 0 to 3.0
If operation is not as specified, replace the heater control assembly.
6. INSTALL HEATER CONTROL ASSEMBLY
1. REMOVE REAR HEATER CONTROL ASSEMBLY
Using a screwdriver, release the 4 claws and pull out the rear heater control assembly, then disconnect the connector.
2. INSPECT ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 21 then check that the illumination light up.
If operation is not as specified, replace the heater control assembly.
3. INSPECT INDICATOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the indicator lights up, as shown in the chart.
If operation is not as specified, replace the heater control assembly.
b. Connect the positive (+) lead from the battery to terminal 2, then check that indicators dim.
If operation is not as specified, replace the heater control assembly.
4. INSPECT SWITCH CONTINUITY
Check the continuity between terminals while switch is pressed, as shown in the chart.
If continuity is not as specified, replace the heater control assembly.
5. INSPECT VARIABLE RESISTOR OPERATION
a. Measure resistance between terminals 10 and 12. Standard resistance: 3.0 kohm
b. Gradually move the temperature control lever from "COOL" side to "WARM" side then check that the resistance between terminals 11 and 12 increase from 0 to 3.0
If operation is not as specified, replace the heater control assembly.
6. INSTALL HEATER CONTROL ASSEMBLY
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.