Section 110-0030
SM 1691 Rev 1 11-99
5
Engine - Engine and Mounting
HEUI ELECTRONIC MANAGEMENT SYSTEM DIAGNOSTIC CODES
Code
Description
Fault Lamp
Additional Actions Taken
Detectable problems may be present, but do not have a
dedicated code:
1. No faults.
1. None.
111
2. TRS signal problem not identified with Code 143, 144, 145 or
None
2. Engine cannot be started.
612.
3. Fan control or transmissionrelay circuit may not be
3. Functionality will be degraded.
functioning properly.
4. Simultaneously energizing PTO control pins 36 & 37.
4. PTO control will be disabled.
5. Main power relay may not be functioning properly.
5. None - functionality may be affected.
112
A voltage more than 28V was provided to the ECM.
None
Intermittent voltage gives inactive code.
Continuous supply causes power down.
113
A voltage less than 6V was provided to the ECM.
None
Intermittent voltage gives inactive code.
Continuous supply causes power down.
114
CTS signal less than 0.127V for more than 0.1 seconds.
Check
ECM will ignore CTS signal & assume a
coolant temp of -29°F (-34°C) for start &
180°F (82°C) for engine operation. Fan
control feature is disabled, fan is kept on all
the time.
115
CTS signal more than 4.6V for more than 0.1 seconds.
Check
ECM will ignore CTS signal & assume a
coolant temp of -29°F (-34°C) for start &
180°F (82°C) for engine operation. Fan
control feature is disabled, fan is kept on all
the time.
121
MAPS signal more than 4.9V for more than 0.1 seconds.
Check
ECM will ignore MAPS signal & operate
engine using program default values.
122
MAPS signal less than 0.39V for more than 0.1 seconds.
Check
ECM will ignore MAPS signal & operate
engine using program default values.
123
MAPS signal more than 16.7 lb/in² (115 kPa) at low idle.
Check
ECM will ignore MAPS signal & operate
engine using program default values.
124
IPS signal less than 0.039V for more than 1 second.
Check
ECM will ignore IPS signal & use open loop
strategy (ECM uses calibrated value based
on engine load, speed & temp to estimate it).
125
IPS signal more than 4.9V for more than 1 second.
Check
ECM will ignore IPS signal & use open loop
strategy (ECM uses calibrated value based
on engine load, speed & temp to estimate it).
131
TPS signal less than 0.146V for more than 0.5 seconds.
Check
Engine speed reduced to low idle setting,
LO-IDLE-SPEED while code active.
132
TPS signal more than 4.55V for more than 0.5 seconds.
Check
Engine speed reduced to low idle setting,
LO-IDLE-SPEED while code active.
133
TPS & IVS signals disagree. Code caused by an intermittent
Check
ECM assumes TPS is the conflict source.
condition.
Engine speed reduced to low idle setting,
LO-IDLE-SPEED. Code remains active until
engine is shutdown & restarted. Will not
recover without cycling the ignition switch.
134
TPS & IVS signals disagree. Either TPS or IVS is varying: TPS &
Check
Engine speed reduced to low idle
IVS signal are varying or ECM cannot determine fault/code in
speed settting, LO-IDLE-SPEED. Code
allotted time. Code caused by intermittent condition.
remains active until engine is shutdown
& restarted. Will not recover without
cycling the ignition switch.
135
IVS signal is varying, while TPS signal is constant. Code caused
Check
Engine speed reduced to 50% of throttle
by intermittent condition.
requested. Code remains active until engine
is shutdown & restarted. Will not recover
without cycling the ignition switch.
141
Test voltage across VSS too low for more than 0.5 seconds.
None
ECM will disable, cruise control, PTO
operation, fast idle control & road speed
limiting, if enabled and limites engine speed
in all gears.
142
Test voltage across VSS too high for more than 0.5 seconds.
None
ECM will disable, cruise control, PTO
operation, fast idle control & road speed
limiting, if enabled and limites engine speed
in all gears.
143
23 wide-window TRS signals were not received between two
None
If condition persists, engine will stop running.
narrow signals.
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