KENR6933 181
Troubleshooting Section
•
Not OK – Diagnostic code 526-6 is active at this
time. Proceed t
oTestStep6.
•
Not OK – Diagnostic code 526-7 is active at this
time. Proceed
to Test Step 4.
Test Step 4. Create a Short C ircuit in the
Harness a t the Solenoid
A. Turn the keyswitch to the OFF position.
B. Disconnect t
he P511 connector for the wastegate
regulator.
C. Fabricateaj
umper wire between P511:1 and
P511:2 in order to create a short circuit.
D. Turn the keys
witch to the ON position. Access the
“Diagnostics Tests” on the electronic service tool.
Activate the “Turbo Wastegate Solenoid Test”.
Wait at least
30 seconds in order for the result to
be displayed.
E. Check for ac
tive diagnostic codes on the electronic
service tool.
Expected Re
sult:
Diagnostic code 526-6 is now active.
Results:
•
OK – Diagnos
tic code 526-6 is now active. There
is a fault in the wastegate regulator.
Repair: Pe
rform the following procedure:
1. Temporarily connect a replacement wastegate
regulator
.
2. Turn the keyswitch to the ON position. Access
the “Diagn
ostics Tests” on the electronic service
tool. Activate the “Turbo Wastegate Solenoid
Test”. Wait at least 30 seconds in order for the
result to b
e 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 Diagnostic code 526-6 is no longer active.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,
permanen
tly 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 C ircuit 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 cre
ate a short circuit.
Note: The P2/J2 connector must be connected
during the nex
tstep.
D. Turn t he keyswitch to the ON posit ion. Access
the “Special T
ests” under the “Diagnostics” menu
on the electronic service tool. Activate the “Turbo
Wastegate Solenoid Output” on the electronic
service tool
.Waitatleast30secondsforactivation
of the diagnostic codes.
E. Check for act
ive diagnostic codes on the electronic
service tool.
Expected Res
ult:
Diagnostic code 526-6 is now active.
Results:
•
OK – Diagnos
tic code 526-6 is now active. There
is a fault in the harness between the ECM and the
wastegate regulator.
Repair: Repair the harness or replace the harness.
Use the elec
tronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminated the fault.
STOP.
•
Not OK – The
re is still an open circuit diagnostic
code.
Repair: Pe
rform the following procedure:
1. Temporarily connect a test ECM. Refer to
Troublesh
ooting, “Programming Parameters”
before replacing the ECM.
2. If the test
ECM fixes the fault, reconnect the
suspect ECM. If the fault returns, permanently
install the replacement ECM.
STOP.
Test Step
6. Disconnect the Wastegate
Regulato
r in order to Create an Open
Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the P511 connector for the wastegate
regulator in order to create an open circuit.
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