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ECM Location & Identification

ECM LOCATION

Model Location
Tercel Bottom Center Of Dash, In Front Of Console
ECM PIN CONNECTOR ABBREVIATION IDENTIFICATION

Abbreviation Function
ABS Anti-Lock Brake ECM
ACA, ACT, ATS A/C Amplifier
AC, AC1, A/C A/C Compressor Or Magnetic Switch
A/D Cruise Control Computer
AI Air Injection Vacuum Switching Valve
AS Air Suction Vacuum Switching Valve
BATT Battery
BK Brake Switch
B, +B, +B1 EFI Main Relay
CHK Sub-Oxygen Sensor
C1 Distributor
DFG Defogger Relay
DG Check Connector
ECT Electronically Controlled Transmission/Transaxle (ECT)
EGR EGR Vacuum Switching Valve
ELS Headlight & Defogger Relay
E1, E2, E01, E02 Engine Or Computer Ground
E11, E2, E21, E22 Sensor Ground
FC Circuit Opening Relay
FP Fuel Pump Relay
FPR Fuel Pump Relay
FPU Fuel Pressure-Up Vacuum Switching Valve
G, G1, G2 Cam Position Sensor Or Distributor
G-, G+ Cam Position Sensor Or Distributor (Crank Angle)
HT Oxygen Sensor Heater
HT1 Oxygen Sensor Heater (Main)
HT2 Oxygen Sensor Heater (Sub)
IDL Throttle Position Sensor
IGDA, IGDB Ignitor
IGF Ignitor
IG SW Ignition Switch
IGT Ignitor (Primary Trigger)
ISCC, ISCO Idle Speed Control Valve
ISCV A/C Idle-Up Vacuum Switching Valve
ISC1, ISC2, ISC3, ISC4 Idle Speed Control Valve Or Motor
KNK, KNK1, KNK2 Knock Sensor
KS Airflow Meter
L Neutral Start Switch Or Shift Position Switch
LP Headlight Relay
L1, L2, L3, L4 (1) ECT
M Neutral Start Switch Or Shift Position Switch
M-REL EFI Main Relay
MS Engine Oil Level Sensor
N Neutral Start Switch Or Shift Position Switch
N/C Clutch Switch (M/T)
NE, NE-, NE+ Cam Position Sensor Or Distributor (RPM)
NSW Neutral/Start Switch (A/T)
No. 1-4 Injector
No. 10, 20 & 30 Injector
OD, ODT Overdrive Solenoid
OD1 Overdrive Off Switch
OD2 Cruise Control Computer Or Overdrive Main Switch
O/G Check Connector
OIL Oil Pressure Switch Or A/T Oil Temperature Warning Light
OLS Engine Oil Level Sensor
OMR Engine Oil Feed Motor
OMT Engine Oil Feed Motor Relay
OSFC Overspeed Fuel Cut
OW Engine Oil Warning Light
OX, OX1, OX+ Oxygen Sensor
OX2 Sub-Oxygen Sensor
P Shift Position Switch Or Pattern Select Switch
PS Power Steering ECM
PSCT Power Steering ECM
PSW Throttle Position Sensor
PIM Vacuum Sensor Or Turbocharger Pressure Sensor
PSW Throttle Position Sensor
PWR Pattern Select Switch
R Neutral Start Switch Or Shift Position Switch
RSC Idle Speed Control Valve
RSO Idle Speed Control Valve
S Neutral Start Switch Or Shift Position Switch
SL, S1, S2 (1) ECT Solenoid
SPD, SPD1, SPD2 Vehicle Speed Sensor
SP1, SPD1 No. 1 Vehicle Speed Sensor, (1) ECT In Instrument Cluster
SP2, SPD2 No. 2 Vehicle Speed Sensor, (1) ECT In Transaxle or Transmission
STA Starter Signal
STP Stoplight Switch
STJ Cold Start Injector
S1, S2, S3, S4 (1) ECT Solenoid
T, TT Check Connector Or (2) DLC
THA, THA1 Air Temperature Sensor
THE Evaporator Temperature Sensor
THG EGR Gas Temperature Sensor
THO, THO1, THO2 Transmission Oil Temperature Sensor
THW Coolant Temperature Sensor
TIL Turbo Indicator Light
TOV Throttle Opener Vacuum Switching Valve
TPC, TPC1 Turbocharger Pressure Vacuum Switching Valve
TVIS Variable Induction System Vacuum Switching Valve
TWS Coolant Temperature Switch
T2 Check Connector
VC Airflow Meter, Vacuum Sensor Or Throttle Position Sensor
VCC Throttle Position Sensor Or Vacuum Sensor
VF, VF1, VF2 Check Connector
V-ISC Auxiliary Control Valve Or Idle-Up System Vacuum Switching Valve
VS Airflow Meter
VSV1 Air Control Vacuum Switching Valve
VSV2 Fuel Pressure-Up Vacuum Switching Valve
VTA Throttle Position Sensor
W Malfunction Indicator Light
2 Neutral Start Switch Or Shift Position Switch
4WD 4WD Indicator
(1) Electronically Controlled Transmission/Transaxle (ECT).
(2) Data Link Connector (DLC).