ECM Circuit Resistance Check
ECM RESISTANCE CHECKCAUTION: To prevent ECM damage, disconnect the negative battery cable before removal or installation of ECM connectors. Check the resistance with the connectors disconnected at the ECM, and ignition switch "OFF." If any of the following circuits are shorted, a new ECM could become damaged.
Fuel Injector:
Between C1 Pin A8 and A17 1-2 Ohms
ISC Solenoid Valve:
Between C1 Pin A6 and A7 11-14 Ohms
TCC Relay (for A/T vehicle):
Between C1 Pin A1 and C2 Pin B11 80-95 Ohms
EGR VSV and Idle Up VSV:
Between C1 Pin A5 and A14 63-77 Ohms
Main Relay and Fuel Pump Relay
Between C1 Pin A15 and circuit A16 124-153 Ohms
Canister Purge VSV
Between C1 Pin A1 and C2 Pin B8 28-40 Ohms
ECM VOLTAGE CHECK
See ECM Connector Pin Out chart to check ECM Pin voltage. [1][2]Diagrams