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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 12 (HYBRID ENGINE CONTROLS - DTC P181C TO DTC P2797)DTC P2797CIRCUIT/SYSTEM TESTINGMOTOR/OPEN SHORT
2009 Chevrolet Tahoe Base, 4.8 C
Motor/Open Short
2009 Chevrolet Tahoe Base, 4.8 CSECTION Motor/Open Short
WARNING: This page is about a different variant/trim than selected.
This display indicates the ATFP control module has detected one of the following pump motor current conditions:
- At least one phase current is more than 70 A.
- Commanded current is more than 5 A and actual current in any phase is less than 2 A.
- Ignition OFF, disconnect the ATFP control module connector X2.
- Using the Auxiliary Fluid Pump Specification table listed below, test the resistance between the X2 circuits of the pump connector as indicated.
- If any of the circuits are not within the specified range, replace the pump assembly and repeat the Circuit/System Verification.
- If all circuits test normal, replace the ATFP control module and repeat Circuit/System Verification.
Auxiliary Fluid Pump Specification
| Pump Connector X2 Terminal | Pump Connector X2 Terminal | Specified Range |
|---|---|---|
| A | E | < 0.5 OHMS |
| A | C | < 0.5 OHMS |
| C | E | < 0.5 OHMS |
| A | F | OL |
| C | F | OL |
| E | F | OL |
| A | Chassis Ground | OL |
| C | Chassis Ground | OL |
| E | Chassis Ground | OL |
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.