
(Table 82, contd)
Troubleshooting Test Steps
Values
Results
7. Create an Open Circuit at the ECM Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector.
C. Turn the keyswitch to the ON position. Wait at least 30 sec-
onds for activation of the diagnostic codes.
Note:
Diagnostic codes for all of the engine sensors will be ac-
tive with the P2 connector disconnected. Ignore all other diag-
nostic codes and only look for codes that relate to the suspect
valve.
D. Check for an active XXXX-5 diagnostic code for the sus-
pect valve.
Diagnostic
codes
Result:
An XXXX-5 diagnostic code is active with the P2 con-
nector disconnected.
The fault is in the wiring between the suspect valve and the
ECM P2 connector.
Check all of the wiring between the suspect valve and the P2
connector. Refer to the Electrical Schematic for the engine.
Replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result:
An XXXX-6 diagnostic code is still active with the P2
connector disconnected.
Proceed to Test Step 8.
8. Check if a Replacement ECM Eliminates the Fault
A. Contact the Dealer Solution Network (DSN).
B. If the DSN recommends the use of a replacement ECM, in-
stall a replacement ECM. Refer to Troubleshooting, “Replac-
ing the ECM”.
C. Use the electronic service tool to recheck the system for ac-
tive diagnostic codes.
Diagnostic
codes
Result:
There are no active diagnostic codes with the replace-
ment ECM.
Reconnect the suspect ECM. If the fault returns with the sus-
pect ECM, replace the ECM.
Use the electronic service tool in order to clear all logged diag-
nostic codes and then verify that the repair eliminates the fault.
Result:
The diagnostic code is still present with the replace-
ment ECM.
Contact the DSN.
i06015862
Oxygen
Level
-
Test
This procedure covers the following diagnostic codes:
Table 83
Diagnostic Trouble Codes for the Oxygen Sensor Circuit
J1939 Code
Description
Notes
3217-3
Aftertreatment #1 Intake O2 : Voltage Above Normal
The Electronic Control Module (ECM) detects a fault in the cir-
cuit for the oxygen sensor.
The fault detected is either an open circuit or short circuit in the
current pump, the ground, the current adjust or the voltage
signal.
3217-4
Aftertreatment #1 Intake O2 : Voltage Below Normal
3219-15
Aftertreatment #1 Intake Gas Sensor at Temperature : High -
least severe (1)
The Electronic Control Module (ECM) detects a fault in the cir-
cuit for the oxygen sensor.
The fault detected is either an open circuit or short circuit in the
current pump, the ground, the current adjust or the voltage
signal.
3219-17
Aftertreatment #1 Intake Gas Sensor at Temperature : Low -
least severe (1)
(continued)
UENR0612
163
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