P0CC3

Code

Generic P — Powertrain

Drive Motor A Coolant Pump Control Circuit Low

Brand: Generic

Type: P — Powertrain

Views: UK: 19 EN: 36 RU: 25

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Page language: EN

Causes

Open or short in pump control wiring (grounded or high resistance)
Corroded, loose or damaged connector at the pump or control module
Failed coolant pump (stator/driver or internal short)
Faulty driver output in hybrid/drive control module
Blown fuse or faulty relay in pump power/control circuit
Intermittent ground or poor chassis ground

Symptoms

DTC P0CC3 stored; possible MIL illumination
Drive motor or inverter overheating warnings or reduced torque mode
Reduced hybrid system performance or limp mode
No coolant pump operation when commanded (audible silence)
Coolant temperature higher than normal for drive motor/inverter

What to check

Read freeze frame and related codes; record battery voltage and operating conditions
Visually inspect pump, harness, and connectors for damage, corrosion, or water intrusion
Check fuses and relays associated with drive motor coolant pump
Backprobe pump control and power pins to measure voltage and ground while commanding pump ON
Measure pump motor resistance and compare to specification
Scan for additional hybrid/inverter or coolant temperature codes

Signal parameters

Control signal idle/command-off: ~0 to 0.5 V (depending on design) or 0% duty
Control signal commanded ON: expected supply voltage or PWM duty (commonly 5–12 V or PWM at 0–100% duty)
Pump motor resistance: typically low ohms (check service spec); infinite/OL indicates open
Current draw when running: motor-specific; a shorted motor may pull high current
Connector pin voltages should match battery voltage on power feed when pump commanded

Diagnostic algorithm

Confirm DTC with scan tool. Note freeze frame, operating conditions, and related codes (e.g., coolant temp, inverter codes).
With ignition ON (or as manufacturer specifies), visually inspect harness and connectors at the coolant pump and control module for corrosion, bent pins, or water intrusion.
Check fuses/relays for the pump circuit. Replace if blown and re-test for recurrence.
Backprobe the control connector while commanding the pump ON from a scan tool: verify control signal voltage/PWM and that power feed and ground are present. Compare to expected values.
Measure static resistance of the pump motor with connector disconnected. Infinite/very high = open circuit; very low/near short = internal fault.
Measure current draw while pump runs (if safe to do). Compare to specification. Excessive current suggests internal short; no current suggests open circuit/no power.
Wiggle test the harness and re-check signals for intermittent faults. Repair any damaged wiring/connector and retest.
If wiring and pump check good, test or replace the drive/hybrid control module driver output per manufacturer procedures or refer to module bench test service information.
Clear codes and perform a road or operational test under the same conditions that set the code to verify repair.

Likely causes

Damaged/frayed harness or pin corrosion at pump connector
Failed pump motor or internal electronics
Faulty module transistor/driver that sinks output too low
Blown/loose fuse or relay for the pump circuit

Fault status

⚠️ Status

Drive Motor A Coolant Pump Control Circuit Low - low-voltage or low-signal detected on the pump control circuit. May affect drive motor/inverter cooling. Inspect electrical circuit and pump operation.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours