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 MANUALSTOYOTA2001LANDCRUISER V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYTESTING AND INSPECTIONREAR CONTROL ASSEMBLYINSPECTION
2001 Toyota Landcruiser V8-4.7L (2UZ-FE)
Inspection
2001 Toyota Landcruiser V8-4.7L (2UZ-FE)SECTION Inspection
INSPECTION
1. INSPECT HEATER CONTROL ASSEMBLY
a. Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 6 then check that the illumination lights up
If operation is not as specified, check the heater control.
b. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the "LO" and "HI" indicators light up as shown in the chart.
If operation is not as specified, check the heater control.
c. Check the continuity exists between terminals 5 and 6 while switch is pressed.
If operation is not as specified, check the heater control.
2. INSPECT HEATER CONTROL
a. Disassemble heater control assembly.
1. Release the 2 claws and pull out the temperature control knob.
2. Using a screwdriver, pull out the switch knob.
HINT: Tape the screwdriver tip before use.
3. Remove the 2 screws and heater control upper retainer.
4. Remove the 2 screws and separate the heater control panel and heater control base.
5. Remove the heater control lens.
6. Remove the 2 screws and heater control.
b. Inspect heater control.
1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the "LO" and "HI" indicators light up as shown in the chart.
If operation is not as specified, replace the heater control. If operation is as specified check the wire harness.
2. Check the continuity exists between terminals 4 and 5 while switch is pressed.
If no continuity exists, replace the heater control. If continuity exists check the wire harness.
3. Check the continuity exists between terminals 5 and 6.
If no continuity exists, replace the heater control.
If continuity exists check the wire harness or bulb.
1. INSPECT HEATER CONTROL ASSEMBLY
a. Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 6 then check that the illumination lights up
If operation is not as specified, check the heater control.
b. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the "LO" and "HI" indicators light up as shown in the chart.
If operation is not as specified, check the heater control.
c. Check the continuity exists between terminals 5 and 6 while switch is pressed.
If operation is not as specified, check the heater control.
2. INSPECT HEATER CONTROL
a. Disassemble heater control assembly.
1. Release the 2 claws and pull out the temperature control knob.
2. Using a screwdriver, pull out the switch knob.
HINT: Tape the screwdriver tip before use.
3. Remove the 2 screws and heater control upper retainer.
4. Remove the 2 screws and separate the heater control panel and heater control base.
5. Remove the heater control lens.
6. Remove the 2 screws and heater control.
b. Inspect heater control.
1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to each terminal, then check that the "LO" and "HI" indicators light up as shown in the chart.
If operation is not as specified, replace the heater control. If operation is as specified check the wire harness.
2. Check the continuity exists between terminals 4 and 5 while switch is pressed.
If no continuity exists, replace the heater control. If continuity exists check the wire harness.
3. Check the continuity exists between terminals 5 and 6.
If no continuity exists, replace the heater control.
If continuity exists check the wire harness or bulb.
RENDER: 1.0x
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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.