180 KENR9126
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 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 follow
ing 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 b attery to the ECM, and from the
keyswitch to the ECM.
Expec
ted Result:
All connectors, pins and sockets are completely
coupl
ed and/or inserted and the harness is free of
corrosion, of abrasion or of pinch points.
Resu
lts:
•
OK – The harness and connectors appear to be
OK. P
roceed to Test Step 2.
•
Not OK – There is a fault with the connectors
and/
or the harness.
Repair: Repair the connectors or the harness or
rep
lace the 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
re
pair eliminates the fault.
STOP.
Test Step 2. Check fo r A ctive D iagnostic
Codes or Logged D iagnostic Codes
A. Connect the electronic service tool to the
diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Monitor the
active 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
diagnosti
c codes to become active.
Expected Result:
One of the following diagnostic codes is active or
logged:
•
168-0 Electrical System Voltage high
•
168-1 El
ectrical System Voltage low
•
168-2 Electrical System Voltage erratic,
intermi
ttent, 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.
Resul
ts:
•
OK – A 168 or a 1834-02 diagnostic code is active
or log
ged. 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
Conn
ectors - Inspect”.
STOP.
Test Step 3. Check the Battery Voltage at
the ECM Conn ector
A. Di
sconnect the connector P1 from the ECM
connector.
B. Tu
rn the keyswitch to the ON position.
C. Measure the voltage between P1:7 (Unswitched
B
attery+) and P1:1 (Batte ry-).
D. Measure the voltage between P1:8 (Unswitched
B
attery+) and P1:2 (Batte ry-).
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