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• When Monitored: • Set Condition: Possible Causes (B15) BRAKE SWITCH NO.1 SIGNAL SHORTED TO GROUND (B15) BRAKE SWITCH NO.1 SIGNAL OPEN (B16) BRAKE SWITCH NO.2 SIGNAL SHORTED TO GROUND (B16) BRAKE SWITCH NO.2 SIGNAL OPEN (Z912) GROUND CIRCUIT OPEN (F202) FUSED IGNITION SWITCH OUTPUT OPEN STOP LAMP SWITCH PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC NOTE: Make sure the Stop Lamp Switch is properly adjusted before continuing. NOTE: Make sure the Stop Lamp Switch is properly wired, such as (B15) Brake Switch No.1 and (B16) Brake With a scan tool, read DTCs. Is the DTC active at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. (B15) BRAKE SWITCH NO.1 SIGNAL SHORTED TO GROUND Turn the ignition off. Disconnect the Stop Lamp Switch harness connector. Disconnect the PCM harness connectors. Measure the resistance between the (B15) Brake Switch No.1 Signal Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (B15) Brake Switch No.1 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 3 9 - 556 ENGINE ELECTRICAL DIAGNOSTICS LX |