P0695

Code

Generic P — Powertrain

Fan 3 Control Circuit Low

Brand: Generic

Type: P — Powertrain

Views: UK: 24 EN: 42 RU: 27

AI status

Completed

ready

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Page language: EN

Causes

Short to ground on the Fan 3 control wiring
Open or high-resistance connection in fan control harness or connector
Corroded or loose connector or ground
Failed fan motor (internal short or excessive current draw)
Faulty relay or blown fuse in fan supply/drive circuit
Faulty PCM / fan driver transistor or controller output

Symptoms

Check Engine Light (MIL) illuminated
Cooling fan 3 not operating when commanded
Intermittent or no A/C condenser fan operation, reduced A/C performance
Engine running hotter than normal or occasional overheating
Fan running at incorrect speed or continuously

What to check

Read and record codes and freeze-frame data with a scan tool; clear and re-test if needed
Visually inspect fan 3 connector, wiring harness, and grounds for damage, corrosion, or pin push-out
Inspect fuses and relays related to cooling fans
Command fan 3 ON/OFF with a scan tool and observe operation
Back-probe the fan control connector and measure voltage with fan commanded ON and OFF
Measure resistance of the fan motor (with connector disconnected) and check for shorts to ground

Signal parameters

Battery voltage (system) typically ~12–14.5 V when engine running
Driver low output (when pulled to ground) ~0–0.5 V
Driver high / inactive (depending on design) may be near battery voltage ~11–14 V or open circuit
PWM frequency (if PWM-driven) commonly tens to a few hundred Hz (model dependent)
Expected fan motor resistance: typically low (ohms range) — varies by motor; high/OL indicates open circuit, very low may indicate short
Expected current draw when running: several amps to tens of amps (varies by fan size and speed)

Diagnostic algorithm

Retrieve DTCs and freeze-frame data; note conditions when fault occurred (engine temp, A/C on, vehicle speed).
Visually inspect fan 3 connector, wiring harness, pins and adjacent grounds for corrosion, damage, or poor connection. Repair any obvious issues.
Check related fuses and swap/inspect cooling fan relay(s). Replace if faulty or uncertain.
With key on/engine off, back-probe the fan control connector and check voltage. Command the fan ON using a scan tool and observe the control signal:
If control line remains low when it should be high/open, check for short to ground in wiring or harness.
If control line switches correctly at the PCM but fan does not run, suspect fan motor, supply circuit, or relay.
Disconnect fan connector and measure resistance between motor terminals and to ground. Bench-test the fan by applying fused 12 V directly to motor (observe current draw and operation). Replace motor if it fails to run or draws excessive current.
If wiring and fan motor check OK, trace back to relay and PCM. Verify supply voltage at relay/fuse and continuity to fan. Swap relay with known good (if identical) to test.
If wiring, relay, fuse and fan motor are all good and symptoms persist, suspect internal PCM/fan driver fault. Confirm with wiring diagrams and consider module testing/replacement per manufacturer procedures.
After repairs, clear codes, perform functional test under the conditions that originally set the code, and confirm no return of the DTC.

Likely causes

Corroded/loose connector at the fan or relay
Short to ground in the fan control lead
Failed fan motor or internal short
Bad relay or blown fuse
Faulty fan driver in the PCM (less common)

Fault status

⚠️ Status

P0695 - Fan 3 Control Circuit Low: Low-voltage condition detected on the Fan 3 control circuit. Possible causes include wiring short to ground, poor connector/ground, failed fan motor, faulty relay/fuse, or defective module output.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours