DTC Code B3670 – What does this code mean?

<ul> <li><a href="/problems/engine-warning-light-on"><b>Engine Light ON</b></a>: The engine light or service engine soon warning light illuminates, indicating a potential issue with the pump motor temperature sensor circuit.</li> <li><a href="/problems/temperature-gauge-fluctuates-erratically"><b>Erratic Temperature Readings</b></a>: The temperature gauge may show erratic or fluctuating readings, suggesting a malfunction in the temperature sensor circuit.</li> <li><a href="/problems/overheating"><b>Overheating Warning</b></a>: The vehicle may display an overheating warning due to incorrect temperature readings from the sensor circuit.</li> </ul>

<ul><li>The folding top pump motor may be faulty, leading to incorrect temperature readings.</li><li>An open or shorted harness in the folding top pump motor can disrupt the sensor circuit.</li><li>Poor electrical connections in the folding top pump motor circuit can cause intermittent sensor issues.</li><li>A malfunctioning folding top control (FTC) module can result in erroneous temperature sensor signals.</li></ul>

<ul> <li><b>Initial Inspection</b>: Visually inspect the pump motor temperature sensor and its wiring for any signs of damage, corrosion, or disconnection. Ensure all connectors are securely attached.</li> <li><b>Check Sensor Resistance</b>: Using a multimeter, measure the resistance of the pump motor temperature sensor. Compare the readings with the manufacturer's specifications to determine if the sensor is functioning correctly.</li> <li><b>Inspect Wiring and Connectors</b>: Check the wiring harness and connectors for continuity and any signs of short circuits or open circuits. Repair or replace any damaged components as necessary.</li> <li><b>Test Sensor Signal</b>: With the ignition on, use an oscilloscope to monitor the sensor signal. Verify that the signal is within the expected range and responds correctly to temperature changes.</li> <li><b>Check Control Module</b>: Inspect the control module for any stored codes or malfunctions that could affect the sensor circuit. Clear any codes and retest the system.</li> <li><b>Perform System Calibration</b>: If all components are functioning correctly, perform a system calibration to ensure the sensor readings are accurately interpreted by the control module.</li></ul>

<p>The DTC B3670 indicates a <b>Pump Motor Temperature Sensor Circuit</b> issue. This is a <b>critical</b> problem as it can lead to overheating of the pump motor, potentially causing severe damage or failure. Immediate attention is required to prevent further complications, such as complete pump failure or damage to associated systems. Delayed repair could result in costly repairs and compromised vehicle safety.</p>