P1586

CIRCUIT DESCRIPTION
The TCC/brake switch indicates brake pedal status to the powertrain control module (PCM). The TCC/brake switch is a normally-closed switch that supplies battery voltage to the PCM. Applying the brake pedal opens the switch, interrupting voltage to the PCM. This DTC is for manual transmission vehicles only, this switch is used for TCC operation on automatic transmission vehicles.

CONDITIONS FOR RUNNING THE DTC
^ The engine speed is more than 1000 RPM for 1 second.
^ The wheel speed is more than 32.2 km/h (20 mph) in order to enable the diagnostic. The diagnostic disables when the wheel speed is less than 8.0 km/h (5 mph).

CONDITIONS FOR SETTING THE DTC
^ The vehicle speed decreases 1.6 km/h (1 mph) in 0.5 seconds without the PCM sensing a switch transition.
^ The condition is present for 10 accel/decel cycles.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the malfunction indicator lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as Failure Records only. This information will not be stored as Freeze Frame Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
Inspect for the following:
^ Ask about the customers driving habits. Ask about unusual driving conditions (e.g. stop and go, expressway, etc.).
^ Inspect the TCC/brake switch for proper mounting, adjustment and operation.
^ Inspect for ABS DTCs. A faulty ABS condition may contribute to setting this DTC.
^ An intermittent connection or poor wire terminal tension may contribute to setting the DTC. Refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST

Steps 1-8:

Steps 9-12: