Chevrolet Captiva Service & Repair Manual: Description

Chevrolet Captiva Service & Repair Manual / Tires / Description

The TPMS (Tire Pressure Monitor System) warns the driver when a significant loss or gain of tire pressure occurs in any of the four tires and allows the driver to display the individual tire pressures and their locations on the DIC (Driver Information Center) display. The system uses the BCM (Body Control Module), DIC, instrument panel cluster, a RF (Radio Frequency) transmitting tire pressure sensor in each wheel and the serial data circuit. Each tire pressure sensor has an internal power supply with service life of 10 years.

When the vehicle is stationary, the sensor is inactive. When the vehicle is operated and as the vehicle speed increases, centrifugal force activates the sensors internal accelerometer, causing the sensors to go into rolling mode. In the rolling mode, the sensors read tire pressure once every 30 seconds and transmit the reading once every 60 seconds. The BCM receives and translates the data transmitted by the sensors into sensor presence, sensor mode and tire pressure. The BCM sends the tire pressure and tire location data to the DIC where the readings can be displayed. The sensors continuously compare the last pressure reading to the current pressure reading and will transmit if a 1.2 psi change in tire pressure has been detected in either stationary or rolling mode. When the TPMS detects a significant loss or gain in tire pressure, the "Check Tire Pressure" message is displayed on the DIC display and the low tire pressure indicator is illuminated.

The BCM can detect faults in the TPMS. If a DTC is set, the TPMS indicator icon on the instrument cluster will flash for one minute and then remain illuminated after the ignition is turned ON and the instrument cluster bulb inspection has been completed. Any fault detected will cause the DIC to display a "service tire monitor system" type message.

Component Replacement

Tire Pressure Indicator Sensor Replacement Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Do not use pain ...

Diagnosis & Testing

Accessing Diagnostic Trouble Codes Connect a suitably programmed scan tool to Data Link Connector (DLC) and follow manufacturers instructions. Diagnostic Tests Low tire press ...

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