ECM Circuit Resistance Check

ECM RESISTANCE CHECK

CAUTION: 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