Service manual

EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5E-43
Battery (Switched K15)
Scan Code: P1605
Blink Code: 1232
Malfunction Indicator Lamp: ON/OFF
75343
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.