What are the causes of Peugeot 307 transmission pressure regulation failure?
1 Answers
Peugeot 307 oil pressure regulator valve electrical failure causes: 1. Power system failure: (1) Loose, short-circuited, detached, or reverse-polarity connection faults at power line terminals. Due to on-site vibration, insecure wiring causes loose connections or excessive dust leading to poor contact, resulting in intermittent signals from the control room to the field, causing erratic valve operation and regulation oscillations. Due to wiring errors, equipment water ingress, or moisture, power line short circuits cause the valve to receive signals lower than the regulator's, preventing full opening or closing. (2) Intermediate joint or damaged section failure in power lines. Environmental vibration, external force pulling, degraded insulation tape, reduced insulation performance, water ingress in joints, or high-temperature baking cause loose or nearly broken power line connections, short circuits between lines or to ground, and broken connectors or power lines. This results in discontinuous valve operation, inability to fully open or close, or complete inaction. (3) Valve not controlled by the regulator. During post-overhaul or post-modification startup, incorrect power line connections or control room configuration errors cause the valve to operate independently of the regulator. 2. Electrical converter failure: (1) Zero point and range inaccuracy. Improper installation calibration or on-site vibration and temperature changes cause inaccurate zero point and range in converter output signals, leading to incomplete valve opening/closing, significant leakage, or flow limitation. During on-site converter calibration, ensure the small signal meter indicates accurately. (2) Throttle orifice blockage. Dirty instrument air blocks the throttle orifice, preventing valve operation. (3) Non-linear output. Aging converter coils/components or on-site vibration and ambient temperature effects cause non-linear converter output, making it impossible to achieve required zero point and range adjustments during calibration, resulting in non-linear valve operation and inability to fully open or close.
