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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 191 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1517CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Testing
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
B1517 03, B1517 52
- If the DTC is history, refer to Charging System Test .
- Ignition On, record the voltage at the battery terminals. Observe the scan tool IPM battery positive voltage parameter. The battery terminal and IPM parameter should not differ by more than 2 volts.
- If not within the specified range, test the B+ circuits of the IPM X3 terminal 1 and X3 terminal 2 to the ground circuit X3 terminal 3.
- If not within the specified range, test the B+ circuits for a short to ground or an open/high resistance.
- If all the circuits test nor mal, replace the IPM.
B1517 52
- Verify that DTC B1517 52 is set as current.
- Ignition OFF, disconnect the harness connector X3 from the IPM.
- Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit X3 terminal 10 and X3 terminal 3 to ground.
- If not within the specified range, test the circuits for an open/high resistance.
- Ignition On, test the B+ circuits X3 terminal 1 and X3 terminal 2 to ground. The B+ circuits should not differ by more than 2 volts.
- If not within the specified range, test the circuits for a short to ground or an open/high resistance.
- If all circuits test nor mal, replace the IPM.
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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.