Perkins 1106C - Page 152

152 KENR6933
Troubleshooting Section
Test Step 1. Insp ect Electrical Connectors
and Wiring
A. Thoroughly inspect the P1 connector, the battery
connections and the connections to the keyswitch.
Refer to Troub
leshooting, “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 electronic service tool to perform a
“Wiggle Test”. Special attention must be paid to
the followin
g 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 (4
4lbin).
E. Check the harness for abrasion and for pinch
points from
the battery to the ECM, and from the
keyswitch to the ECM.
Expected Re
sult:
All connectors, pins and sockets are completely
coupled an
d/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. Procee
dtoTestStep2.
•
Not OK – There is a fault with the connectors
and/or the
harness.
Repair: Repair the connectors or the harness or
replace th
e connectors or the harness. Ensure that
all of the seals are correctly installed 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 el
iminates the fault.
STOP.
Test Step 2. Check for Active Diagnostic
Codes or Logged Diagnostic Codes
A. Connect the electronic service tool to the
diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Monitor the ac
tive diagnostic code screen on
the electronic service tool. Check and record
any active diagnostic codes or logged diagnostic
codes.
Note: Wait at least 30 seconds in order for the
diagnostic c
odes to become active.
Expected Result:
One of the following diagnostic codes is active or
logged:
•
168-0 Electrical System Voltage high
•
168-1 Elect
rical System Voltage low
•
168-2 Electrical System Voltage erratic,
intermitte
nt, 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 lo
gged but not active, this may be the
cause.
Results:
•
OK – A 168 or a 1834-02 diagnostic code 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
Connector
s - Inspect”.
STOP.
Test Step 3. Check the Battery Voltage at
the ECM Connec tor
A. Disconne
ct the connector P1 from the ECM
connector.
B. Turn the k
eyswitch to the ON position.
C. Measure the voltage between P1:7 (Unswitched
Battery+
) and P1 :1 (B attery-).
D. Measure the voltage between P1:8 (Unswitched
Battery+
) and P1 :2 (B attery-).