CU Terminal Connections
4A-GZE (USA Model AW11)
schematics contributed by Andy Karkos
Toyota 4AGZE ECU pin-outs (U.S. with AFM and distributor)
From the Toyota MR2 1988 electrical wiring diagram.
|EO2||E01||Earth 01, Earth 02|
|RSO||RSC||both to ISC valve|
|IGT||STA||IGniTer, STArter signal and cold-start injector|
|E1||EGR||Earth 1, EGR solenoid|
|SMC||NSW||Supercharger relay, Neutral switch 0r clutch switch|
|xxx||#10||not used, Injectors 1 and 3|
|xxx||#20||not used, injectors 2 and 4|
|VF||G-||Check connector, distributor pickup coil|
|T||G1||Test pin (check connector), dist. pickup coil|
|VTA||G2||throttle position sensor, distributor pickup coil|
|IDL||NE||Throttle position sensor, distributor pickup coil|
|HT||VS3||O2 sensor heater, air bypass valve solenoid|
|OX||IGF||Oxygen sensor, IGnition Feedback from ignitor|
|E2||THW||common for THW THG and AFM, THermistor Water temp|
|E22||R/P||Same as e2, Regular/Premium switch|
|xxx||VS2||Not used, supercharger vent solenoid|
|L3||L1||From ECT computer|
|ECT||L2||From ECT computer|
|A/C||TIL||From a/c amplifier,Supercharger light|
|W||SPD||To check engine Warning light, speed sensor|
|FPU||ELS1||Fuel Pressure Up solenoid, stop light switch|
|KNK||THA||KNocK sensor, THermistor Air temp (in afm)|
|xxx||VS||not used, AFM wiper|
|THG||VC||THermistor eGr, AFM supply voltage|
|B+||Bat||switched +12v, constant +12v|
|+B1||ELS2||switched +12v, idle up diode|
There are a few differences between the rare 4AGZE ECU and the non-supercharged versions. My car is running a 4AGZE engine plus a turbo on a Corolla GTS ECU and Supra AFM without *much* difficulty. The specific differences and possible solutions are.....
Extra GTS pins,
GTS ecu has S/TH pin. This is for T-vis solenoid. - Not used
GTS ecu has v/isc pin. Idle-up solenoid. - Not used
Extra 4AGZE pins,
RSO, RSC, - Not used, idle set by screw.
EGR, - No solenoid on egr valve, egr functions fine.
SMC, - Supercharger (and intercooler fan) on dashboard switch.
G1, G2, - use GTS distributor (2 pickups) instead of 4AGZE (3 pickups), MSD 6BTM is used to retard spark under boost.
VS3, - dashboard switch controls supercharger.
R/P, - Use premium always. (who doesn't?)
VS2, - Supercharger vents connected to supercharger output.
TIL, I suppose you could use a LIGHTED dashboard supercharger switch.
W - You have access to this under the hood at the diagnostic connector.
SPD Not used. (no speed limiter)
FPU - Ummm, I don't think this is connected either.
ELS1 - Not used.
KNK - I WISH my ecu could use a knock sensor, see R/P and G1, G2.
THG - Not used either
ELS2 - Not used, idle is set with screw.