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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUND (B16) BRAKE SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE (F202) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE (Z967) GROUND CIRCUIT OPEN OR HIGH RESISTANCE (B15) BRAKE SIGNAL 1 CIRCUIT OPEN OR HIGH RESISTANCE (B16) BRAKE SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE STOP LAMP SWITCH POWERTRAIN CONTROL MODULE (PCM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE Turn the ignition on. With the scan tool, monitor the states of Brake Signal 1 and Brake Signal 2 while pressing and releasing the brake Do the Brake Signal states change appropriately as the pedal is pressed and released? Yes >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 2 2. (B15) BRAKE SIGNAL 1 CIRCUIT Turn the ignition off. Disconnect the Powertrain Control Module (PCM) connector. Using a 12 volt test light connected to 12 volts, check the (B15) Brake Does the test light change from illuminated to not illuminated Yes >> Go to 3. No >> Go to 4 PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 487 |