Perkins 1106D Troubleshooting Manual page 139

KENR6201-01
•
Not OK – The open circuit diagnostic code
remains active with the jumper in place. The most
probable location for the open circuit is in the
sensor common or the sensor signal wire in the
engine harness between the ECM and the sensor.
Remove the jumper. Proceed to Test Step 6.
Test Step 6. Check The Operation Of The
ECM By Creating An Open And A Short
Circuit At The ECM Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2/J2 ECM connector.
C. Thoroughly inspect both halves of the connector
for signs of corrosion or moisture. Refer to
Troubleshooting, "Electrical Connectors - Inspect".
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 30
seconds in order to allow activation of the code.
An open circuit diagnostic code should be active
for the suspect sensor.
Note: When P2 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. Address 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. Monitor the "Active Diagnostic Code" screen on
the electronic service tool before installing the
jumper wire and after installing the jumper wire.
H. Remove the signal pin from the P2 connector for
the suspect sensor. Remove the P2:37 connector.
Install one end of the jumper on the suspect
sensor signal pin on the connector P2. Install
the other end of the jumper toP2:37 common
connection for the sensors. Reassemble the P2
connector to the ECM. Use the electronic service
tool in order to check the diagnostic codes. Wait
at least 30 seconds in order to allow activation of
the short circuit diagnostic code.
Note: The open circuit diagnostic code for the
temperature sensor that is not suspect should
become active when the sensor common connection
is removed from the P2 connector. This code can be
disregarded.
This document is printed from SPI². Not for RESALE
Expected Result:
A short circuit diagnostic code is active when the
jumper is installed. An open circuit diagnostic code is
active when the jumper is removed.
Results:
•
OK – Proceed to test step 7.
•
Not OK
Repair: The ECM does not operate correctly.
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 7. Bypass the Harness Wiring
Between the ECM and the Sensor
Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2/J2 connector for the ECM
harness, and the suspect sensor connector.
C. Remove the sensor signal wire from the P2
connector.
D. Remove the signal wire (terminal 1) from the
sensor connector on the engine harness.
E. Fabricate a jumper wire that is long enough to
reach from the ECM to the sensor connector with
sockets on both ends.
139
Troubleshooting Section