The following is what I had to do to install the 1101 AEM EMS (Speed Density) on my 1992 SC300 5-speed that AEM did *NOT* cover in their instructions. So this is all supplemental to the install instructions provided by AEM.
For the record, the 1101 box is NOT plug and play for this application. More like plug and play with your soldering iron.
Some of my sensors you may not want to use so substitute as you see fit. Wiring should remain the same.
MAP Sensor: GM 3-Bar
Part Numbers:
GM P/N: 12223861
Aftermarket P/N: D21 213 101
Pigtail P/N: KEM 350 259
Wiring:
Pin A: Ground (brown wire) (E)
Pin B: Signal (yellow/green wire) ECU Pin 66B-->62B (KS)***
Pin C: +5V Reference (blue/red wire) ECU Pin 41B (VC)
***Move signal wire Pin 66B (MAF Input - obsolete) to Pin 62B (MAP Input) on the ECU connector. This saves you from running a separate wire into the cabin by just using the old MAF input wire.
Intake Air Temperature Sensor:
Part Numbers:
Aftermarket P/N: KEM 139 202
Pigtail P/N: KEM 148 018
Wiring:
Polarity doesn't matter:
Brown Wire ECU Pin 65B (E2)
Yellow/Black Wire ECU Pin 45B (THA)
Your a/c will not run so install the following:
Air Conditioning: Pull-Up Resistor
Wire in 1k ohm resistor between pins:
ECU Pin 34A (A/C) blue/red wire (a/c request input)
ECU Pin 33A (BATT) black/yellow wire (Battery Voltage)
Resistor Specs:
Resistance: 1,000 (1k) Ohms
Part Number: Radio Shack #271-153
Color Bands: Brown-Black-Red
Set the following in the A/C options menu:
A/C Request Input: "Switch #6 Ground = ON"
A/C Output #1: LS6
A/C Output #2: Disable
This should set you up pretty good. Have fun.
How to Install an AEM 1101 EMS into OBD-1 SC300
