Code 43, No Crank Signal From Starter

WARNING: This page is about a different car, the 1992 Geo Prizm. However, it is still accessible from the selected car via links, so may be relevant.

ECM receives a 12-volt signal when starter is cranking. ECM uses this signal to control fuel pump activation. If signal is not present and engine speed is greater than 800 RPM, Code 43 will set.

NOTE: Test numbers refer to test numbers on diagnostic chart.

Battery voltage should be present on the Black wire while engine is cranking.

Fig 1: Code 43 Schematic (Except GSi), No Crank Signal From Starter

Fig 2: Code 43 Flow Chart (Except GSi), No Crank Signal From Starter