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.
Power Relay Test: Test
How to use this service information .
NOTICE:
When working with a vehicle equipped with the electronic air suspension, be sure to set it to the leveling off mode to prevent unexpected operation. Refer to the Electronic Air Suspension System Service Precautions - Refer to: Electronic Air Suspension System Connector Fitting Precautions or Electronic Air Suspension System Service Precautions for the procedure.
- Power Relay - Test
Preconditions
- Relay Removed
Procedure/Specifications
Use this chart to identify the type of relay, then do the test listed for it.
Relay Test Active control engine mount (ACM) control relay (3.5 L engine) Normally-open four-terminals type A/C condenser fan relay (3.5 L engine) Cargo area accessory power socket relay DC-DC converter ACC relay ('22-24 USA and Canada models/'25) DC-DC converter IG1 relay 1 DC-DC converter IG1 relay 2 Electronic throttle control system (ETCS) control relay (3.5 L engine) Front console accessory power socket relay ('22-24) Horn relay Injector relay Left second row seat with one-touch access relay PGM-FI main relay 1 RFC relay 1 (3.0 L engine) RFC relay 2 (3.0 L engine) Radiator fan relay (3.5 L engine) Right second row seat with one-touch access relay SH-AWD relay (With AWD) Fan control relay (3.5 L engine) Five-terminals type Normally-Open Four-Terminals Type
Check the relay according to the table. (Figure 1 and 2)
Figure 1
Figure 2
Five-Terminals Type
- Check the relay according to the table. (Figure 3, 4, and 5)
Figure 3 (Battery power is not applied)
Figure 4 (Battery power is applied)
Figure 5
Result
- If the result is not as specified, replace the power relay.
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.