Capacity of Texas, Inc.
64
Table 4-3 CM2150 System Fault Codes
Fault
Code
Reason
Effect
629
{12}
Electronic Control Module
Critical Internal Failure – Bad
Intelligent Device or
Component. Error internal to
the electronic control module
(ECM) related to memory
hardware failures or internal
ECM voltage supply circuits.
Engine may
not
start.
612
{2}
Engine Magnetic Speed/
Position Lost Both of Two
Signals – Data Erratic,
Intermittent, or Incorrect. The
electronic control module
(ECM) has detected that the
primary and backup speed
sensor signals are connected
backwards.
None on performance.
102
{3}
Intake Manifold 1 Pressure
Sensor Circuit – Voltage
Above Normal or Shorted to
High Source. High signal
voltage detected at the intake
manifold pressure circuit.
Derate in power output of the
engine.
102
{4}
Intake Manifold 1 Pressure
Sensor Circuit – Voltage
Below Normal or Shorted to
Low Source. Low signal
voltage or open circuit
detected at the intake manifold
pressure circuit.
Derate in power output of the
engine.
91
{3}
Accelerator Pedal or Lever
Position Sensor 1 Circuit –
Voltage Above Normal or
Shorted to High Source. High
voltage detected at accelerator
pedal position number 1
circuit.
Severe derate in power output
of the engine. Limp home
power
only
.
91
{4}
Accelerator Pedal or Lever
Position Sensor 1 Circuit –
Voltage Below Normal or
Shorted to Low Source. Low
voltage detected at accelerator
pedal position number 1 signal
circuit.
Severe derate in power output
of the engine. Limp home
power
only
.
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