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 MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSTESTING AND INSPECTIONPINOUT VALUES AND DIAGNOSTIC PARAMETERSMULTIPLEX COMMUNICATION SYSTEM
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Multiplex Communication System
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Multiplex Communication System
TERMINALS OF ECU
1. CHECK MAIN BODY ECU
a. Disconnect the B5, B6 and B7 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
2. CHECK DRIVER DOOR ECU
a. Disconnect the D22 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK FRONT PASSENGER DOOR ECU
a. Disconnect the F18 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
c. Disconnect the F18 ECU connector.
d. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
4. CHECK SLIDING ROOF ECU
a. Disconnect the S19 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
5. CHECK BACK DOOR ECU
a. Disconnect the B10 and B11 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
6. CHECK COMBINATION METER
a. Disconnect the C5 and C6 meter connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
7. CHECK MEMORY SEAT ECU AND SWITCH (w/ Driving Position Memory)
a. Disconnect the M6 and M7 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
8. CHECK A/C ECU (INTEGRATION CONTROL AND PANEL)
a. Disconnect the I19 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
1. CHECK MAIN BODY ECU
a. Disconnect the B5, B6 and B7 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
2. CHECK DRIVER DOOR ECU
a. Disconnect the D22 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK FRONT PASSENGER DOOR ECU
a. Disconnect the F18 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
c. Disconnect the F18 ECU connector.
d. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
4. CHECK SLIDING ROOF ECU
a. Disconnect the S19 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
5. CHECK BACK DOOR ECU
a. Disconnect the B10 and B11 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
6. CHECK COMBINATION METER
a. Disconnect the C5 and C6 meter connectors.
Part 1:
Part 2:
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
7. CHECK MEMORY SEAT ECU AND SWITCH (w/ Driving Position Memory)
a. Disconnect the M6 and M7 ECU connectors.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
8. CHECK A/C ECU (INTEGRATION CONTROL AND PANEL)
a. Disconnect the I19 ECU connector.
b. Measure the resistance or voltage of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
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.