Perkins 1106D Troubleshooting Manual page 127

KENR6201-01
2. Use the electronic service tool to verify if the
diagnostic code remains active.
3. If the diagnostic code is active replace the
sensor.
4. Use the electronic service tool in order to clear
all logged diagnostic codes and then verify that
the repair eliminated the fault.
STOP.
•
Not OK – The open circuit diagnostic code
remains active when the jumper is installed. The
most probable location for the open circuit is in the
common wire for the sensor, or in the sensor signal
wire of the engine harness between the ECM and
the sensor. Remove the jumper. Proceed to Test
Step 8.
Test Step 8. Check the Operation of the
ECM by Creating Open and Short Circuits
at the ECM Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect connector P2 from the ECM.
Thoroughly inspect both halves of the connector
for signs of corrosion or moisture. Refer to
Troubleshooting, "Electrical Connectors - Inspect".
C. Reconnect P2 connector.
D. Turn the keyswitch to the ON position. Use the
electronic service tool in order to monitor the
"Active Diagnostic Code" screen. Wait at least 10
seconds for activation of the code.
An open circuit diagnostic code should be active
for the suspect sensor.
Note: When the P2connector is disconnected, all of
the open circuit diagnostic codes for the pressure
sensors and temperature sensors will be active. This
is normal. Disregard the diagnostic codes for the
pressure sensors and the temperature sensors that
are not suspect. Monitor the diagnostic codes for the
suspect sensors only.
E. Turn the keyswitch to the OFF position.
F. Fabricate a jumper wire 150 mm (6 inch) long.
Crimp a terminal to both ends of the wire.
G. Install the jumper wire on the P2 connector.
Insert the jumper wire between the terminal
for the suspect sensor signal and the common
connection for the engine's pressure sensor.
Use the electronic service tool to verify that there
is a "Voltage Above Normal" diagnostic code.
This document is printed from SPI². Not for RESALE
Expected Result:
"Voltage Below Normal" diagnostic codes and
"Voltage Above Normal" diagnostic codes were
active.
Results:
•
OK – The ECM is operating correctly. Proceed to
Test Step 9.
• Not OK – One of the following conditions exists:
The "Voltage Below Normal" diagnostic code is
not active when the harness is disconnected. The
"Voltage Above Normal" diagnostic code is not
active when the jumper wire is installed.
Repair: Perform the following repair:
1. Make sure that the latest flash file for the
application is installed in the ECM. Refer to
Troubleshooting, "Flash Programming".
2. Contact Perkins Global Technical Support.
Note: This consultation can greatly reduce the repair
time.
3. If Perkins Global Technical Support
recommends the use of a test ECM, install a
test ECM. Refer to Troubleshooting, "Replacing
the ECM".
4. Use the electronic service tool to recheck the
system for active diagnostic codes.
5. If the fault is resolved with the test ECM,
reconnect the suspect ECM.
6. If the fault returns with the suspect ECM,
replace the ECM.
7. Use the electronic service tool in order to clear
all logged diagnostic codes and then verify that
the repair eliminates the fault.
STOP.
Test Step 9. Bypass the Harness Wiring
Between the ECM and the Sensor
Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector and disconnect the
connector from the suspect sensor.
C. Remove the sensor signal wire from the P2
connector.
D. Remove the signal wire (terminal 3) from the
sensor connector on the engine harness.
127
Troubleshooting Section