Perkins NJ Series Troubleshooting Manual page 184

184
Troubleshooting Section
Test Step 1. Inspect Electrical Connectors
and Wiring
A. Thoroughly inspect the P1 connector, the battery
connections and the connections to the keyswitch.
Refer to Troubleshooting, "Electrical Connectors -
Inspect" for details.
B. Perform a 45 N (10 lb) pull test on each of the
wires in the ECM connector that are associated
with the following connections:
• P1: 7, 8, 15, 16 (Unswitched +Battery)
• P1: 1, 2, 3, 9, 10 ( Battery)
•
P1:40 (keyswitch)
C. Use the Perkins EST to perform a "Wiggle Test".
Special attention must be paid to the following
connections:
•
P1: 7, 8, 15, 16
•
P1: 1, 2, 3, 9, 10
• P1:40
D. Check the ECM connector for the correct torque
of 5.0 N·m (44 lb in).
E. Check the harness for abrasion and for pinch
points from the battery to the ECM, and from the
keyswitch to the ECM.
Expected Result:
All connectors, pins and sockets are completely
coupled and/or inserted and the harness is free of
corrosion, of abrasion or of pinch points.
Results:
•
OK – The harness and connectors appear to be
OK. Proceed to Test Step 2.
• Not OK – There is a fault with 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 2. Check for Active Diagnostic
Codes or Logged Diagnostic Codes
A. Connect the Perkins EST to the diagnostic
connector.
B. Turn the keyswitch to the ON position.
C. Monitor the active diagnostic code screen on
Perkins EST. Check and record any active
diagnostic codes or logged diagnostic codes.
Note: Wait at least 30 seconds in order for the
diagnostic codes to become active.
Expected Result:
One of the following diagnostic codes is active or
logged:
•
168-0 Electrical System Voltage high
• 168-1 Electrical System Voltage low
• 168-2 Electrical System Voltage erratic,
intermittent, or incorrect
•
1834-2 Ignition Keyswitch loss of signal
Note: Diagnostic code 1834-2 can be generated
by rapidly cycling the keyswitch. If diagnostic code
1834-2 is logged but not active, this may be the
cause.
Results:
• OK – Diagnostic code 168-2 or 1834-2 is active or
logged. Proceed to Test Step 3.
• Not OK – No diagnostic code is active.
Repair: The fault is no longer present. If the fault
is intermittent, refer to Troubleshooting, "Electrical
Connectors - Inspect".
STOP.
Test Step 3. Check the Battery Voltage at
the ECM Connector
A. Disconnect the connector P1 from the ECM
connector.
B. Turn the keyswitch to the ON position.
C. Measure the voltage between P1:7 (Unswitched
+Battery) and P1:1 (-Battery).
D. Measure the voltage between P1:8 (Unswitched
+Battery) and P1:2 (-Battery).
SENR9982-01