DTC B2597: TCS Switch Circuit (Short To Ground): Notes

Traction Control System (TCS) switch circuit provides a ground input to BCM when switch is pressed. If BCM detects a ground on circuit No. 1571 (Brown/White wire) when TCS is off, BCM will send signal on serial data line to EBTCM to turn on TCS. If BCM detects a ground when TCS is activated, BCM will send another signal to EBTCM to turn off TCS. BCM monitors TCS switch circuit to determine how long a ground has been applied.

DTC B2597 will set when BCM detects a ground on circuit No. 1571 (Brown/White wire) for longer than 60 seconds. No driver warning message will be displayed. If conditions for malfunction no longer exist, history DTC will clear after 50 consecutive ignition cycles. DTC B2597 will also clear when conditions no longer exist, or when IPC or scan tool is used to clear codes.