Spectrum 3.0L GM - Page 223

223
DTC 524260 5 Volt Power Supply 1 Out of Spec
Step Action Value(s) Yes No
1
 Did you perform the On-board diagnostics
(OBD) system check?
Go to Step
(2)
Go to On-
Board Diag-
nostics
System
Check/Malfun
ction indicator
lamp.
2
 Disconnect all sensors for the 5 volt supply
showing the fault.
 Refer to the wiring diagram and measure the
voltage from the 5 volt supply to the ground
of each sensor or component
Are all supplies between 4.8 and 5.2 volts?
Between 4.8
and 5.2 volts
Go to Step
(3)
Go to Step
(5)
3
 One at a time, reconnect a sensor while
monitoring the voltage at another sensor.
Does the voltage go out of range when recon-
necting a sensor?
Go to Step
(4)
Intermittent
problem. Go
to Preliminary
and Intermit-
tent Checks
4
 Examine the connector of the sensor that
causes the voltage to go out of range.
Is there any damage to the connector?
Repair as ne-
cessary. Go
to Step (8).
Replace the
sensor that
causes the
fault in the
voltage. Go to
step last
5
 Refer to the 5 volt supply table and check
each supply circuit for a short to power or
ground.
Are there any harness faults?
Repair as re-
quired. Go to
Step (8).
Go to Step
(6)
6
 Reconnect all connectors.
 Clear all codes.
 With the Key ON, engine off, monitor the sys-
tem for any faults.
Does the fault return? Are any faults detected?
Replace the
ECU. Go to
Step (8)
Go to Step
(7)
7
 Flex the connectors at the ECU while watch-
ing for faults.
Does the fault return?
Repair or re-
place the
harness. Go
to Step (8).
Intermittent
problem. Go
to Preliminary
and Intermit-
tent Checks