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.

2007 Scion tC Base, AutomaticFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

REMOVE IG2 RELAY (Marking: IG2)
1. Remove the engine room relay block cover.
2. Remove the IG2 relay from the engine room relay block.

INSPECT IG2 RELAY

Measure the EFI relay resistance.

Standard resistance

IG2 RELAY TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
3-5	10 kΩ or higher
3-5	Below 1 Ω (when battery voltage Is applied to terminals 1 and 2)

If the result is not as specified, replace the relay.

INSTALL IG2 RELAY

Fig 1: Identifying IG2 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Factory Service Tools

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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.

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