Test TC-152A - Brake Switch Sense Circuit

NOTE: For connector terminal idnetification, see CONNECTOR IDENTIFICATION DIRECTORY table. For wiring diagram, see WIRING DIAGRAMS article.

Turn ignition off. Disconnect the brake switch connector. Turn ignition on. Using scan tool in voltmeter mode, check the voltage of the brake switch sense circuit at brake switch connector. See the BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table. If voltage is more than 9 volts, go to next step. If voltage is 9 volts or less, go to step 3).
Observe brake switch status on scan tool. Connect a jumper wire from brake switch sense circuit to ground. If scan tool display changed from PRESSED to RELEASED, replace brake switch. Perform TEST VER-2A . If scan tool display did not change, replace Powertrain Control Module (PCM). Perform TEST VER-2A .
Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for pushed out terminals or damage. Repair PCM connector as necessary. Perform TEST VER-2A . If PCM connector is okay, go to next step.
Using an external ohmmeter, check resistance of brake switch sense circuit between PCM connector terminals No. 50 and 62. See PCM TERMINALS 50 & 62 CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open brake switch sense circuit. Perform TEST VER-2A .
Using scan tool in ohmmeter mode, check resistance of brake switch sense circuit at PCM connector terminal No. 62. See PCM TERMINALS 50 & 62 CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, repair short to ground on brake switch sense circuit. Perform TEST VER-2A . If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A .

BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION

Application	Wire Color
Brake Switch Sense Circuit	White/Pink

PCM TERMINALS 50 & 62 CONNECTOR WIRE IDENTIFICATION

Application	Wire Color
PCM Terminal No. 50 (Ground Circuit)	Black/Tan
PCM Terminal No. 62 (Brake Switch Sense Circuit)	White/Pink