DTC 43

Data Trouble Code No. 43 - Starter Signal

Detecting Condition

No Starter signal to the Engine Control Module

Trouble Area

- Open or short in Starter Signal circuit.
- Open or short in Ignition Switch or Main Relay circuit.
- Engine Control Module.

Malfunction Indicator Lamp

Normal Mode N.A.
Test Mode OFF

Code 43 Description:

Circuit Description
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery positive voltage is applied to terminal STA of the engine control module. The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after-start injection control.

HINT: This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not cranked, proceed to Diagnosis by Symptom.

Code 43 Diagnostic Chart:

Diagnostic Chart

Code 43 Circuit Diagram:

Circuit Diagram

Code 43 Inspection Procedure:

Circuit Diagram