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 MANUALSTOYOTA2004TUNDRA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSPOWER LOCKSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSDOUBLE CAB
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)
Double Cab
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)SECTION Double Cab
INSPECTION
1. INSPECT DRIVER DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
2. INSPECT PASSENGER SIDE DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
3. INSPECT DRIVER SIDE DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
4. INSPECT PASSENGER SIDE DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
5. INSPECT REAR LEFT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
6. INSPECT REAR RIGHT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
7. INSPECT DRIVER SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
8. INSPECT PASSENGER SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
9. INSPECT REAR LEFT SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 4, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
10. INSPECT REAR RIGHT SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 4, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
1. INSPECT DRIVER DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
2. INSPECT PASSENGER SIDE DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
3. INSPECT DRIVER SIDE DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
4. INSPECT PASSENGER SIDE DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
5. INSPECT REAR LEFT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
6. INSPECT REAR RIGHT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If the continuity is not as specified, replace the door lock assembly.
7. INSPECT DRIVER SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
8. INSPECT PASSENGER SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
9. INSPECT REAR LEFT SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 4, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
10. INSPECT REAR RIGHT SIDE DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 4, and check that the door lock cable moves to the UNLOCK position.
(b) Reverse the polarity and check that the door lock cable moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.
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.