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 MANUALSTOYOTA2007HIGHLANDER HYBRID, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSAUDIO SYSTEM & VISUAL SYSTEM (HYBRID)REAR SEAT ENTERTAINMENT SYSTEMDTC 01-DD MASTER RESET; DTC 01-DF MASTER ERRORDESCRIPTION

2007 Toyota Highlander Hybrid, FWD

DTC 01-DD Master Reset; DTC 01-DF Master Error: Description

2007 Toyota Highlander Hybrid, FWDSECTION Description

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Areas
01-DD *1	The device that should be the master has been disconnected after engine starts	Multi-display controller power source circuit AVC-LAN circuit between the multi-display controller and the component which has stored this code Multi-display controller Component which has stored this code
01-DF *2	The device with a display fails and the master is switched to the audio device
HINT: 1: This code may be stored if the engine is started and the ignition switch is turned to the START position again. 2: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the ignition switch ACC or ON condition, this code is stored.

NOTE:

Be sure to clear and recheck DTCs and perform inspection according to the result to avoid the conditions shown in the "HINT" above.
The multi-display controller is the master unit.
Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

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.