Esteem L4-1590cc 1.6L SOHC 0 MFI 16V (1995)
Data Link Connector: Description and Operation
Diagnosis Switch Terminal
The diagnosis switch terminal is included in the diagnosis connector 1 in the relay box. When diagnosis switch terminal is grounded, a diagnosis
signal is fed to ECM which then outputs diagnostic trouble code and at the same time outputs idle air control duty through duty output terminal.
Test Switch Terminal
The test switch terminal is included in the diagnosis connector 1 in relay box. When this terminal is grounded, ECM fix the ignition timing to
initial one. When both test switch terminal and diagnosis switch terminal are grounded, ECM outputs A/F duty through the duty output terminal.