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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSSCION2007TC BASE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEM (2AZ-FE)IG1 RELAYON-VEHICLE INSPECTION

2007 Scion tC Base, Automatic

On-Vehicle Inspection

2007 Scion tC Base, AutomaticSECTION On-Vehicle Inspection

REMOVE RELAY (Marking: IG1)
1. Remove the IG1 relay from the instrument panel junction block.

INSPECT RELAY

Measure the IG1 relay resistance.

Standard resistance

IG1 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 RELAY

Fig 1: Identifying IG1 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.