Checking the control module's powersupply and ground connection

Symptom: Alternative I: TCS OFF lamp on, TCS inoperative.Alternative II: TCS OFF lamp and TCS lamp both fail to light up when ignition turned ON.Alternative III: Malfunctioning.

Checking the control module's power supply and ground connection

Fault symptom

Alternative I: TCS OFF lamp on, TCS inoperative.

Alternative II: TCS OFF lamp and TCS lamp both fail to light up when ignition turned ON.

Alternative III: Malfunctioning.

Diagnostic procedure

When a BOB is connected in conjunction with fault diagnosis, the voltage supply and ground connections should always be checked first, as follows:

Ignition switch in Drive position

1.	Battery positive - pin 32 <0.5 V

2.	Battery positive - pin 28 <0.5 V

3.	Pin 30 - Battery negative <0.1 V

4.	Pin 13 - Battery negative <0.1 V