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 MANUALSTOYOTA2009TUNDRA 2WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONPINOUT VALUES AND DIAGNOSTIC PARAMETERSAIR CONDITIONING SYSTEM (FOR MANUAL AIR CONDITIONING SYSTEM)
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)
Air Conditioning System (for Manual Air Conditioning System)
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)SECTION Air Conditioning System (for Manual Air Conditioning System)
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): TERMINALS OF ECU
TERMINALS OF ECU
1. CHECK AIR CONDITIONING AMPLIFIER
(a) Measure the voltage and resistance according to the value(s) in the table below.
HINT: Check from the rear of the connector with it connected to the air conditioning amplifier.
If the result is not as specified, the ECU may have a malfunction.
(b) Using an oscilloscope, check waveform 1.
(c) Using an oscilloscope, check waveform 2.
HINT: When the blower level is increased, the duty ratio changes accordingly.
(d) Using an oscilloscope, check waveform 3.
HINT: The waveform varies depending on the CAN communication signal.
(e) Using an oscilloscope, check waveform 4.
HINT: The waveform varies depending on the CAN communication signal.
2. CHECK INTEGRATION CONTROL AND PANEL
(a) Disconnect the J37 integration control and panel connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
If the result is not as specified, there may be a malfunction on the wire harness side.
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.