General Motors Transfer Case Control Simulator

Well here is my latest creation. This box allows us to test General Motors Transfer Case Control Modules.

We can simulate front and rear prop shaft speed to test encoder motor clutch engagement. It has a OE transfer case switch to allow testing on the various modes for the 4 wheel drive operation. But why stop there, we have a engine control to simulate Vehicle Speed, Engine Coolant Temperature, Throttle Position, Manifold Pressure, Mass Air Flow, Oxygen Sensor operation, Oil Pressure, Transmission Range Selection, Current Draw, Voltage, Encoder Reference Voltage, 4WD Reference Voltage, 5 Volt Reference, Class 2 Data, and even a OBD II connector to use the GM TECH II for diagnostics and calibration updates.

We can even operate the instrument cluster and body control for vehicle security.

Whats inside? A General Motors engine control for a 2001 S10 Blazer, Body control for the same, 20 Amp 13.5 Volt switching power supply. Five Arduino Uno's to simulate crank position, cam position, vehicle speed, front and rear prop shaft speed. Three 555 timers to simulate Bank 1 & 2 upstream oxygen sensors, and one down stream oxygen sensor.

Does it work? Well I repaired 6 TCCM's under an hour! Cool thing is we can trouble-shoot the encoder motor, TCCM module and dash switches in a few minutes.