P2D6C

Code

Generic P — Powertrain

Battery Charging System Positive Contactor D Control Circuit/Open

Brand: Generic

Type: P — Powertrain

Views: UK: 25 EN: 29 RU: 22

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Read and record freeze-frame data and all related codes with a scan tool
Visual inspection of harness and connectors at contactor D and control module
Check and test any fuses or low-voltage relays in the contactor control circuit
Measure voltage at the contactor control pin while commanding ON from a scan tool
Check continuity and resistance of the contactor coil with vehicle power isolated
Wiggle harness/connectors while monitoring the circuit for intermittent faults

When commanded ON: control circuit should present battery supply voltage (~12 V nominal) at the contactor control terminal (subject to vehicle architecture)
When commanded OFF: control circuit should be 0 V or open circuit
Contactor coil resistance (typical): low ohms (tens of ohms) — an open (OL) indicates a failed coil
Expected commanded coil current: typically a few hundred mA to a few amps depending on contactor design
Open-circuit measurement: infinite/very high resistance between coil terminals

Safety: follow manufacturer high-voltage safety procedures if vehicle is HV/hybrid. Disable high-voltage system before working on contactor hardware.
Retrieve all stored DTCs and freeze-frame data. Clear codes and attempt to re-run the event to confirm repeatability.
Visually inspect wiring and connectors for damage, corrosion or poor engagement at the contactor, fuse blocks and control module.
Check relevant fuses/relays and replace if blown or suspect. Verify supply voltage present to the relay/fuse as required.
Using a scan tool, command Contactor D ON while monitoring voltage at the contactor control terminal. If the module commands ON but no voltage appears at the contactor, suspect wiring or fuse; if voltage is present but contactor does not engage, suspect contactor failure.
With vehicle power isolated, measure coil resistance across contactor coil. If coil is open, replace the contactor.
Perform continuity/resistance checks from the control module output pin to the contactor control terminal to locate an open circuit or high resistance. Repair/replace damaged wiring or connectors.
If wiring and contactor test good, verify the control module output driver by backprobing output or substituting a known-good module per manufacturer guidance. Replace control module only after confirming harness and contactor integrity.
After repairs, reassemble, clear codes, and perform functional/road test and verify the DTC does not return.