Operation Section
-100-
Table 2. MI-07 Diagnostic Fault Codes (Flash Codes) cont’d
.
DFC
PROBABLE FAULT
FAULT ACTION *
CORRECTIVE ACTION
FIRST CHECK
481
(28)
ETCSpringTest
Electronic Throttle Control
Spring Return Test has
failed. The SECM will
perform a safety test of the
throttle return spring
following engine shutdown. If
this spring has become weak
the throttle will fail the test
and set the fault.
NOTE: The throttle
assembly is not a
serviceable item and can
only be repaired by
replacing the DV-EV
throttle assembly.
(1) TurnOnMil
(2) EngineShutdown
Perform throttle spring test by cycling
the ignition key and re-check for fault
491
(29)
HbridgeFault_ETC
Electronic Throttle Control
Driver has failed.
Indeterminate fault on
Hbridge driver for electronic
throttle control. Possibly
either ETC+ or ETC- driver
signals have been shorted to
ground
TurnOnMil
Check ETC driver wiring for a shorted
circuit
SECM Pin A17 to ETC + Pin 1
SECM Pin A18 to ETC - Pin 4
Perform the throttle test using the
Service Tool and re-check for fault
Check the ETC internal motor drive by
disconnecting the throttle connector
and measuring the motor drive
resistance at the throttle
TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER) ~3.0-4.0
Ω
521
(52)
LowOilPressureFault
Low engine oil pressure
(1) TurnOnMil
(2) DelayedEngine
Shutdown
(3) CheckEngine Light
Check engine oil level
Check electrical connection to the oil
pressure switch
SECM Pin B9 to Oil Pressure Switch
531
(53)
SysVoltRangeLow
System voltage too low
TurnOnMil
Check battery voltage
Perform maintenance check on
electrical connections to the battery
and chassis ground
Check battery voltage during starting
and with the engine running to verify
charging system and alternator
function
Measure battery power at SECM with a
multimeter (with key on)
SECM Pin A23 (DRVP) to
SECM Pin A16 (DRVG)
SECM Pin A23 (DRVP) to
SECM Pin B17 (DRVG)
(*) Fault actions shown are default values specified by the OEM.
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