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 MANUALSTOYOTA2003MATRIX XRS 2WD L4-1.8L (2ZZ-GE)REPAIR AND DIAGNOSISBODY AND FRAMERELAYS AND MODULES - BODY AND FRAMEKEYLESS ENTRY MODULETESTING AND INSPECTION
2003 Toyota Matrix XRS 2WD L4-1.8L (2ZZ-GE)
Keyless Entry Module: Testing and Inspection
2003 Toyota Matrix XRS 2WD L4-1.8L (2ZZ-GE)SECTION Testing and Inspection
TERMINALS OF ECU
1. INSPECT INTEGRATION RELAY
a. Disconnect the connector from the integration relay.
b. Check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table.
If the result is not as specified, the vehicle's side may malfunction.
c. Reconnect the connector and check the voltage between each terminal and the body ground, as shown in the illustration and table.
If the result is not as specified, the integration relay may malfunction.
2. INSPECT INSTRUMENTAL PANEL J/B (INTEGRATION RELAY)
a. Disconnect the connectors IA, IB, ID, IF, IH and IJ of the instrument panel J/B.
b. Check the continuity between each terminal of the disconnected connectors and the body ground, as shown in the illustration and table.
If the result is not as specified, the vehicle's side may malfunction.
c. Reconnect the connectors and check the voltage between each terminal and the body ground, as shown in the illustration and table.
If the result is not as specified, the integration relay or instrument panel J/B assembly may malfunction.
Terminals Of ECU/pinouts Part 1:
1. INSPECT INTEGRATION RELAY
a. Disconnect the connector from the integration relay.
Terminals Of ECU/pinouts Part 2:
b. Check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table.
If the result is not as specified, the vehicle's side may malfunction.
Terminals Of ECU/pinouts Part 3:
c. Reconnect the connector and check the voltage between each terminal and the body ground, as shown in the illustration and table.
If the result is not as specified, the integration relay may malfunction.
Terminals Of ECU/pinouts Part 1:
2. INSPECT INSTRUMENTAL PANEL J/B (INTEGRATION RELAY)
a. Disconnect the connectors IA, IB, ID, IF, IH and IJ of the instrument panel J/B.
Terminals Of ECU/pinouts Part 2:
b. Check the continuity between each terminal of the disconnected connectors and the body ground, as shown in the illustration and table.
If the result is not as specified, the vehicle's side may malfunction.
Terminals Of ECU/pinouts Part 3:
c. Reconnect the connectors and check the voltage between each terminal and the body ground, as shown in the illustration and table.
If the result is not as specified, the integration relay or instrument panel J/B assembly may malfunction.
RENDER: 1.0x
NO RELATED
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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.