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 421 (LEXUS LINK SYSTEM - DIAGNOSIS)PROBLEM SYMPTOMS TABLE
2004 Toyota Celica GT, Standard
Problem Symptoms Table
2004 Toyota Celica GT, StandardSECTION Problem Symptoms Table
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Be sure to check that there is no trouble in infrastructure before performing the troubleshooting.
PROBLEM SYMPTOMS
| Symptom | Suspect Area | See Section | ||
|---|---|---|---|---|
| The guidance voice of "System Message" does not come out when ignition switch is turned ON. |
|
THE GUIDANCE VOICE OF "SYSTEM MESSAGE" DOES NOT COME OUT WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" INTERMITTENTLY STOP WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" BEGINS IN THE MIDDLE WHEN IGNITION SWITCH IS TURNED ON | ||
| The guidance voice of "System Message" intermittently stop/begins in the middle. | Telephone ECU (Mayday ECU) | THE GUIDANCE VOICE OF "SYSTEM MESSAGE" DOES NOT COME OUT WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" INTERMITTENTLY STOP WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" BEGINS IN THE MIDDLE WHEN IGNITION SWITCH IS TURNED ON | ||
| The guidance voice does not come out during "Memo Call" function operates. |
|
THE GUIDANCE VOICE OF "SYSTEM MESSAGE" DOES NOT COME OUT WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" INTERMITTENTLY STOP WHEN IGNITION SWITCH IS TURNED ON, THE GUIDANCE VOICE OF "SYSTEM MESSAGE" BEGINS IN THE MIDDLE WHEN IGNITION SWITCH IS TURNED ON | ||
| When playing the recorded memos, the voice does not come out. |
|
MALFUNCTION IN "MEMO CALL" FUNCTION. | ||
| When playing the recorded memos it finishes in the middle. | Telephone ECU (Mayday ECU) | IN-34 | ||
| When playing the recorded memos, the playing time is too long. |
|
MALFUNCTION IN "MEMO CALL" FUNCTION. | ||
| When playing the recorded memos, the volume cannot be adjusted. |
|
MALFUNCTION IN "MEMO CALL" FUNCTION. | ||
| The guidance voice of "Demo Memo" does not come out. |
|
THE GUIDANCE VOICE OF "DEMO MEMO" DOES NOT COME OUT. | ||
| The guidance voice does not sound during "Service Call" function. | Telephone ECU (Mayday ECU) | IN-34 | ||
| When "Service Button" is working, the voice cannot reach to LEXUS Link Center, connection is cut off immediately after the voice reaches. |
|
WHEN "SERVICE BUTTON" IS WORKING THE CONNECTION TO LEXUS LINK CENTER CANNOT BE MADE OR IS IMMEDIATELY CUT OFF. | ||
| While service call is working, the voice cannot reach to LEXUS Link Center. |
|
WHILE SERVICE CALL IS WORKING, VOICE CANNOT REACH TO LEXUS LINK CENTER. | ||
| After the connection to LEXUS Link Center, no voice comes out. |
|
AFTER THE CONNECTION TO LEXUS LINK CENTER, NO VOICE COMES OUT. | ||
| The connection cannot be cut off. |
|
THE CONNECTION TO LEXUS LINK CENTER CANNOT BE CUT OFF. | ||
| The line condition with LEXUS Link Center is not good. |
|
THE LINE CONDITION WITH LEXUS LINK CENTER IS NOT GOOD. | ||
| After the connection to LEXUS Link Center the data cannot be reached to LEXUS Link Center. |
|
THE LINE CONDITION WITH LEXUS LINK CENTER IS NOT GOOD. | ||
| GPS receiver error. | GPS antenna or Telephone ECU (Mayday ECU) (1) | - | ||
| The uncontrolled "Service Call" is sent. |
|
THE UNCONTROLLED SERVICE IS SENT., THE UNCONTROLLED EMERGENCY CALL IS SENT. | ||
| The uncontrolled "Emergency Call" is sent. |
|
THE UNCONTROLLED SERVICE IS SENT., THE UNCONTROLLED EMERGENCY CALL IS SENT. | ||
| The buck-up battery life is short. |
|
BUCK-UP BATTERY LIFE IS SHORT. | ||
|
||||
HINT:
- Park the vehicle at the open sky area at least 50 meter away from any buildings.
- More than 2 minutes after the ignition switch ON, call to LEXUS Link Center, and confirm the vehicle's location is correct.
- If location is confirmed correctly, turn the ignition key OFF and wait 30 minutes, and do (2) again.
If location is confirmed, go back to ones.
- If location is not confirmed, with the engine keep ON, place a call to LEXUS Link Center at least 5 times every 2 minutes.
If location is not confirmed, turn the ignition key OFF and wait 1 hour, and go back to again.
- If location is confirmed correctly, turn the ignition key OFF and wait 30 minutes, and do (2) again.
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.