Battery (Switched K15) - Mercury MerCruiser D2.8L D-Tronic Service Manual

SERVICE MANUAL NUMBER 22

Battery (Switched K15)

Scan Code:
Blink Code:
Malfunction Indicator Lamp:
CIRCUIT DESCRIPTION:
Battery voltage is supplied to the ECM through several circuits. The ignition switch terminal
15 (sometimes called K15) is energized when the key is switched to the ON / RUN position.
However, the ignition switch is not monitored by the ECM. Instead, evaluation of the
unverified terminal 15 is carried out by the ECM. If the ECM detects 0 volt at CKT Pin 38
it sets the trouble code.
DIAGNOSTIC HELP:
Verify the following:
•
Open in CKT Pin 38 from ignition switch.
•
Improper terminals or pins at the electrical box terminal connectors or ECM.
•
Defective ignition switch.
•
Internal ECM system failure. Defective ECM.
Recognition by the ECM of a defective battery switched terminal 15 influences engine
performance as follows:
•
No loss of power.
90-860074--1 FEBRUARY 2002
P1605
1232
ON/OFF
EDI DIAGNOSIS
75343
Page 5E-43