Section 07 ENGINE MANAGEMENT (DI)
Subsection 04 (DIAGNOSTIC PROCEDURES)
SMR2003-025_07_04A.FM 07-04-3
System Failures
Refers to operating conditions outside normal and/or safe ranges such as demand system failures, ex-
treme voltages, over temperature conditions or low fuel/oil levels.
➀ To see how the normal operation is recovered from the limp home mode, see the DI FAULT CODES
chart elsewhere in this section. Look in column “Normal operation resumes if fault removed and...”.
PROBLEM INFO CENTER RED LED BUZZER
BUZZER
CODE
LIMP HOME MODE
➀
Manifold air pressure
sensor (MAPS),
ATM fault (bad
atmospheric
pressure reading)
“MAINT” ON OFF 7 Limited RPM
Throttle position
sensor (single TPS)
“MAINT” ON ON 3Limited RPM
Throttle position
sensor (dual TPS)
“MAINT” ON ON 5 Idle RPM
Throttle position
sensor
(single adaption fault)
None OFF OFF 7 None
Throttle position
sensor
(dual adaption fault)
“MAINT” ON OFF 7 Limited RPM
Sensor supply fault
(TPS and MAPS)
“MAINT” ON ON/OFF 5/(7)
Limited RPM
(code 7 and idle RPM
if both in fault)
Encoder (CPS) fault
(bad pattern)
“MAINT” ON OFF 7 Limited RPM
Low battery
voltage
“12 V LOW” ON OFF 7 None
Very low battery
voltage
“12 V LOW”
“MAINT”
ON ON 5Limited RPM
High battery
voltage
“MAINT” ON OFF 7 None
Very high battery
voltage
“MAINT” ON OFF 7 Idle RPM
High water
temperature
“HI-TEMP” ON ON 1 None
Exhaust
over temperature
“HI-TEMP” ON ON 3 None
Low oil level “OIL-LOW” ON ON 6 None
Low fuel level “FUEL-LO” ON ON 5 None
Setup fault
(TDC or TPS not set
on a new MPEM)
“MAINT” ON OFF 7 Idle RPM
MPEM fault “MAINT” ON OFF 7 Engine will not start.
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