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DTC 524260 5 Volt Power Supply 1 Out of Spec
Conditions for Setting the DTC
The voltage output of the two power supplies are compared against two range limits. The first “Out of
Spec” limits are 4.8 to 5.2 volts the second “Malfunction” limits are 4.5 to 5.5 volts. If the 5 volts supplies
are outside the “Out of Spec” limits but not outside the broader “Malfunction” limits the sensors and com-
ponents will continue to operate but at a reduced accuracy. If the 5 volt supplies are outside the
malfunction range sensors and components may fail to operate. The voltage being outside the malfunction
limits may be an indication of a short to ground or short to battery voltage somewhere in the system.
Voltage supply at the 5 volt reference is less than 4.8 volts or greater than 5.2 volts.
NOTE:
If the 5 volt supply is shorted to ground through wiring or a sensor, this code may set.
Circuit Description
The ECU has two externally available 5 volt regulated power supplies. These power supplies are used as
a power source and or a reference voltage for the various sensors and components used in the fuel sys-
tem. If there is an out of spec fault in either 5 volt supply, the system will go to the Limp Home mode.
5 Volt Supply 1 Table
Supply 1 ECU-A pin G2 Pedal 1 5 volt supply VIC 1 pin M
ECU-B pin G1 Not Used
ECU-B pin G2 Throttle position sensor supply pin 2
ECU-C pin B3 Not Used
5 Volt Supply 2 Table
Supply 2 ECU-A pin F2 Pedal 2 5 volt supply VIC 1 pin S
ECU-B pin J2 FRP Pin B and Crank Sensor Pin 1
ECU-B pin H2 MAP Sensor supply pin 3
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