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 MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 162 (REMOTE KEYLESS ENTRY)CIRCUIT TESTSWIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT
2004 Toyota Celica GT, Standard
Wireless Door Lock Control Receiver Circuit
2004 Toyota Celica GT, StandardSECTION Wireless Door Lock Control Receiver Circuit
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
- Connector Disconnected -
Inspect the wireless door lock control receiver circuit. See WIRELESS DOOR LOCK TUNER CIRCUIT under CIRCUIT TESTS under BODY CONTROL SYSTEM
article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. Disconnect the connector from the receiver and inspect the connector on the wire harness side. See CONNECTOR IDENTIFICATION . See INSPECTING WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT (CONNECTOR DISCONNECTED) table. If the circuit is not as specified, inspect the circuits connected to other parts.INSPECTING WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT (CONNECTOR DISCONNECTED)
Tester Connection Condition Specified Condition 1 - Ground Constant Continuity - Connector Connected -
Inspect the wireless door lock control receiver circuit. Connect the wire harness side connector to the receiver and inspect the wire harness side connector from the back side. See CONNECTOR IDENTIFICATION . See INSPECTING WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT (CONNECTOR CONNECTED) table.INSPECTING WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT (CONNECTOR CONNECTED)
Tester Connection Condition Specified Condition 3 - Ground All Doors Are Closed & Key Removed 5 Volts Intermittently 4 - Ground All Doors Are Closed, Key Removed & Transmitter OFF/ON Transmitter ON: Changes Between 0-5 Volts, Transmitter OFF: Below 1 Volt
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.