Engine Magnetic Speed/Position Lost Both of Two Signals - Data Erratic, Intermittent... Page 1 of 4
FAULT CODE 115
Engine Magnetic Speed/Position Lost Both of Two
Signals - Data Erratic, Intermittent, or Incorrect
Overview
CODE
REASON
Fault Code: 115
PID:
SPN: 612
FMI: 2
LAMP: Red
SRT:
Engine Magnetic Speed/Position Lost
Both of Two Signals - Data Erratic,
Intermittent, or Incorrect
EFFECT
Fueling to the injectors is
disabled and the engine
can not be started.
Engine Speed Sensor and Camshaft Position Sensor Circuit
Circuit Description
The engine speed sensor and the camshaft position sensor are connected to the engine
wiring harness.
Component Location
The engine speed sensor reads a tone wheel mounted to the engine crankshaft. The
sensor is located on the left side of the cylinder block toward the flywheel.
The camshaft position sensor reads a tone wheel inside the front gear cover. The sensor is
located on the left side of the engine on the back of the gear housing.
Shop Talk
The engine speed sensor and camshaft position sensor use the same style sensor and the
connector keys are the same. It is possible to connect the wiring harness to the incorrect
sensors. If this occurs, the electronic control module (ECM) will detect the problem and the
engine will not start. Once the connector problem is corrected, the engine can be started
and the fault code will become inactive.
Troubleshooting Steps
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Engine Magnetic Speed/Position Lost Both of Two Signals - Data Erratic, Intermittent... Page 2 of 4
STEPS
STEP 1.
SPECIFICATIONS
Check the fault codes.
STEP 1A. Determine if Fault Code Fault Code 115 becomes active during
115 becomes active during
cranking?
cranking.
STEP 1B. Inspect the engine
harness.
STEP 2.
Harness connectors connected to
correct sensors?
Clear the fault codes.
STEP 2A. Disable the fault code.
Fault Code 115 inactive?
STEP 2B. Clear the inactive fault
codes.
All fault codes cleared?
Guided Step 1 - Check the fault codes.
Guided Step 1A - Determine if Fault Code 115 becomes active during
cranking.
Conditions
z
z
Turn the keyswitch ON.
Connect INSITE™ electronic
service tool.
Action
Attempt to start the engine by engaging
the starter for at least 10 seconds.
z
Use INSITE™ electronic service
tool to read the fault codes.
Fault Code 115 becomes active during
cranking?
Fault Code 115 becomes active during
cranking?
YES
NO
No Repair
No Repair
Go to 1B
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Go to 2A
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Engine Magnetic Speed/Position Lost Both of Two Signals - Data Erratic, Intermittent... Page 3 of 4
Guided Step 1B - Inspect the engine harness.
Conditions
z
Turn the keyswitch OFF.
Action
Inspect the engine harness connectors
for correct connections.
z
Make sure the engine speed
sensor and camshaft position
sensor are connected to the
engine wiring harness correctly.
Harness connectors connected to
correct sensors?
Harness connectors connected to
correct sensors?
YES
NO
No Repair
No Repair
Go to 2A
Go to 2A
Guided Step 2 - Clear the fault codes
Guided Step 2A - Disable the fault code.
Conditions
z
z
z
Connect all components.
Connect INSITE™ electronic
service tool.
Turn the keyswitch ON.
Action
Disable the fault code.
z
Use INSITE™ electronic service
tool to verify Fault Code 115 is
inactive.
Fault Code 115 inactive?
Fault Code 115 inactive?
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Engine Magnetic Speed/Position Lost Both of Two Signals - Data Erratic, Intermittent... Page 4 of 4
YES
NO
No Repair
No Repair
Go to 2B
Go to 1A
Guided Step 2B - Clear the inactive fault codes.
Conditions
z
z
z
Connect all components.
Connect INSITE™ electronic
service tool.
Turn the keyswitch ON.
Action
Clear the inactive fault codes.
z
Use INSITE™ electronic service
tool to erase the inactive fault
codes.
All fault codes cleared?
All fault codes cleared?
YES
NO
No Repair
No Repair
Repair complete
Appropriate troubleshooting steps
Last Modified: 01-Apr-2005
Copyright© 2005
Cummins, Inc.
All rights reserved
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