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 MANUALSLEXUS2009ES 350 V6-3.5L (2GR-FE)REPAIR AND DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMKEYLESS STARTING SYSTEMDIAGRAMSDIAGNOSTIC AIDSHOW TO TROUBLESHOOT ELECTRICAL CIRCUITSFINDING A SHORT CIRCUIT
2009 Lexus ES 350 V6-3.5L (2GR-FE)
Finding A Short Circuit
2009 Lexus ES 350 V6-3.5L (2GR-FE)SECTION Finding A Short Circuit
FINDING A SHORT CIRCUIT
Remove the blown fuse and disconnect all loads of the fuse.
Connect a test light in place of the fuse.
Establish conditions in which the test light comes on.
Example:
- [A] - Ignition SW on
- [B] - Ignition SW and SW1 on
- [C] - Ignition SW, SW1 and Relay on (Connect the Relay) and SW2 off (or Disconnect SW2)
Disconnect and reconnect the connectors while watching the test light.
The short lies between the connector where the test light stays lit and the connector where the light goes out.
Find the exact location of the short by lightly shaking the problem wire along the body.
CAUTION: Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.)
When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with the terminals of leads from the IC, etc. of the replacement part (spare part).
Remove the blown fuse and disconnect all loads of the fuse.
Connect a test light in place of the fuse.
Establish conditions in which the test light comes on.
Example:
- [A] - Ignition SW on
- [B] - Ignition SW and SW1 on
- [C] - Ignition SW, SW1 and Relay on (Connect the Relay) and SW2 off (or Disconnect SW2)
Disconnect and reconnect the connectors while watching the test light.
The short lies between the connector where the test light stays lit and the connector where the light goes out.
Find the exact location of the short by lightly shaking the problem wire along the body.
CAUTION: Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.)
When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with the terminals of leads from the IC, etc. of the replacement part (spare part).
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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.