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Test P





Pinpoint Test P: DTC C1440 (ABS Only) - Pressure Transducer Signal Fault





















CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

Normal Operation

The brake pressure switch provides an additional speed control deactivation if the brake pedal position (BPP) switch fails. When the brake pedal is pressed, 1700 kPa (246 psi) of brake fluid pressure in the brake master cylinder opens the brake pressure switch, removing B+ voltage to the speed control servo electric clutch.

Possible Causes

- circuit 10 (LG) open
- circuit 307 (BK/YE)open, short to power
- ABS module
- brake pressure switch
- speed control deactivator switch

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