P2D67

Code

Generic P — Powertrain

Battery Charging System Negative Contactor C Control Circuit Low

Brand: Generic

Type: P — Powertrain

Views: UK: 28 EN: 34 RU: 29

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Read freeze frame and related DTCs; record conditions when code set
Verify 12 V battery (auxiliary) and HV system voltages are within spec
Visually inspect contactor C, harness, connectors and fuses for damage/corrosion
Back-probe/control-pin voltage with key/charger commanded ON and OFF
Check coil resistance of contactor C and compare to manufacturer spec
Check continuity between ECU/charger control output and contactor connector

Expected control voltage: ~12 V (or manufacturer-specified supply) when contactor is commanded ON; ~0 V when OFF. Fault reported when measured voltage is significantly below expected (e.g.,
Contactor coil resistance: varies by design — typically in the low ohms (example 0.5–5 Ω). Consult service manual for exact value.
Contactor coil current: typically 1–10 A while energized depending on design — check manufacturer spec
Driver output may be PWM or switched ground; verify waveform and duty as per service data
Reference voltages and ground integrity must be within spec for correct control-signal readings

Retrieve all related codes and freeze-frame data. Note charge state and conditions when code set.
Clear codes and attempt to reproduce. Monitor whether code returns and under what conditions.
Verify auxiliary 12 V battery and charger supply voltages are within spec. Replace or charge as needed.
Visually inspect contactor C, connector pins, harness routing and protective tubing for damage, corrosion, or water intrusion.
With the system OFF, disconnect contactor connector and measure coil resistance. Compare to spec. An open or shorted coil indicates contactor replacement.
With harness connected, back-probe the control pin at the contactor while commanding the contactor ON. Measure voltage/current. If voltage is low (
If control voltage absent at contactor but present at ECU output pin, inspect wiring between ECU and contactor for high resistance or opens. If absent at ECU output, test driver output pin per manufacturer procedure (bench test or scope).
Apply an external, fused 12 V supply to the contactor coil (bench or vehicle test following safety procedures) to verify mechanical operation. Do not bypass safety interlocks on HV systems.
If contactor operates with external supply and wiring/circuit check OK, suspect ECU/charger driver module. If contactor fails to operate with proper supply, replace contactor.
After repairs, clear codes, perform functional tests and a full system charge/discharge verification. Re-scan for pending codes.