Sidekick L4-1324cc 1.3L SOHC 5 Carb 8V (1989)
Engine Control Module: Testing and Inspection
ECM Ground Circuits
Fig. 17 ECM Ground Circuit Test Connections
The ECM is grounded at both the dash panel and intake manifold. The feedback system will not function if both connections are not secure. Check for
proper grounding as follows:
1.
Turn ignition off.
2.
Disconnect ECM electrical connector.
3.
Using an ohmmeter, measure resistance between terminal 1 and body ground as shown, Fig. 17, then between terminal 21 and body ground. ECM
is properly grounded if resistance is zero ohms. If resistance is not zero, check wiring at terminals (1) and (21) for loose or disconnected wires.
4.
Reconnect ECM connector securely.