Perkins NJ Series Troubleshooting Manual page 220

220
Troubleshooting Section
• Not OK – There is a fault in the connectors and/or
the harness.
Repair: Repair the connectors or the harness
and/or replace the connectors or the harness.
Ensure that all of the seals are correctly in place
and ensure that the connectors are completely
coupled.
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 3. Determine the Diagnostic
Code that is Active
A. Turn the keyswitch to the ON position. Access the
"Diagnostics Tests" on the Perkins EST. Activate
the "Turbo Wastegate Solenoid Test". Wait at least
30 seconds in order for the result to be displayed.
B. Determine if the fault is related to either of the
following:
• "Low current" (open circuit)
• "High current" (short circuit)
Expected Result:
The Perkins EST displays no diagnostic codes.
Results:
• OK – There are no active codes.
Repair: The original codes may have been caused
by a loose connector. If this is an intermittent fault,
refer to Troubleshooting, "Electrical Connectors
- Inspect".
STOP.
• Not OK – Diagnostic code 526-5 is active at this
time. Proceed to Test Step 4.
•
Not OK – Diagnostic code 526-6 is active at this
time. Proceed to Test Step 6.
• Not OK – Diagnostic code 526-7 is active at this
time. Proceed to Test Step 4.
Test Step 4. Create a Short Circuit in the
Harness at the Solenoid
A. Turn the keyswitch to the OFF position.
B. Disconnect the P511 turbo wastegate solenoid
connector.
C. Fabricate a jumper wire between P511:1 and
P511:2 in order to create a short circuit.
D. Turn the keyswitch to the ON position. Access the
"Diagnostics Tests" on the Perkins EST. Activate
the "Turbo Wastegate Solenoid Test". Wait at least
30 seconds in order for the result to be displayed.
E. Check for active diagnostic codes on the Perkins
EST.
Expected Result:
Diagnostic code 526-6 is now active.
Results:
•
OK – Diagnostic code 526-6 is now active. There
is a problem with the solenoid.
Repair: Perform the following procedure:
1. Temporarily connect a replacement wastegate
regulator.
2. Turn the keyswitch to the ON position. Access
the "Diagnostics Tests" on the Perkins EST.
Activate the "Turbo Wastegate Solenoid Test".
Wait at least 30 seconds in order for the result
to be displayed.
3. Diagnostic code 526-6 is no longer active.
4. If the fault is eliminated, reconnect the suspect
wastegate regulator. If the fault returns,
permanently install the replacement wastegate
regulator.
STOP.
• Not OK – The low current diagnostic code (open
circuit) is still active. Proceed to Test Step 5.
Test Step 5. Create a Short Circuit at the
ECM
A. Turn the keyswitch to the OFF position.
B. Temporarily remove the wires from P2:17 and
P2:44.
C. Fabricate a jumper wire between P2:17 and P2:44
in order to create a short circuit.
Note: The P2/J2 connector must be connected
during the next step.
SENR9982-01