Generic Electronic Module (GEM) Controlled Functions

GEM/CTM Controlled Functions

Central Timing Modules (CTMs) are equipped on the two-wheel drive vehicles without power windows. All other vehicles have a Generic Electronic Module (GEM).





NOTE: CTM diagnostics are not compatible with the New Generation STAR (NGS) Tester. Instead, the diagnostics are internal to the module. The diagnostic mode is entered by shorting two pins of the diagnostic connector together.

Generic Electronic Module (GEM)





The two versions of the GEM module for the 1997 model year are:
- GEM circuit Protection
- Short Circuit/Battery Voltage

The GEM inputs and outputs are designed to withstand continuous exposure to a short circuit to ground or battery voltage without being damaged.

GEM Features and Functions

GEM Feature Matrix:

The GEM controls the following features:
- Wipers/washers.
- Warning chimes.
- Battery saver.
- Illuminated entry and courtesy lamps,
- Driver power window.
- Accessory delay.
- 4-Wheel drive.