U0002–CAN C BUS OFF PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
Possible Causes
|
(D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND
|
(D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
|
(D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
|
(D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE
|
(D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT
|
ANTILOCK BRAKE MODULE
|
POWERTRAIN CONTROL MODULE
|
ENGINE CONTROL MODULE (DIESEL ONLY)
|
TRANSMISSION CONTROL MODULE
|
STEERING ANGLE SENSOR
|
AUTOMATIC SWAY BAR SYSTEM MODULE
|
WIRELESS CONTROL MODULE
|
OCCUPANT RESTRAINT CONTROLLER MODULE
|
OCCUPANT CLASSIFICATION MODULE
|
TOTALLY INTEGRATED POWER MODULE
|
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0002–CAN C BUS OFF PERFORMANCE as active?
Yes
No
-
The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2.
ANTILOCK BRAKE MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001-CAN C BUS OFF PERFORMANCE as active?
Yes
No
-
Inspect the wiring and connectors for damage or shorted circuits in accordance with the service information. If ok, replace and program the Anti—Lock
Brake Module in accordance with the service information.
-
Perform ABS VERIFICATION TEST.
(Refer to 5 - BRAKES - STANDARD PROCEDURE)
3.
POWERTRAIN CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the Powertrain Control Module C1 harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
-
Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Powertrain Control Module in accordance with the service information.
-
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5.
4.
ENGINE CONTROL MODULE (DIESEL ONLY) — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Engine Control Module harness connectors.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
-
Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Engine Control Module in accordance with the service information.
-
Perform the ECM VERIFICATION TEST.
5.
TRANSMISSION CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Transmission Control Module harness connectors.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
-
Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Transmission Control Module in accordance with the service
information.
-
Perform the TCM VERIFICATION TEST.
6.
STEERING ANGLE SENSOR — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Steering Angle Sensor harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
-
Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Steering Angle Sensor in accordance with the service information.
-
Perform ABS VERIFICATION TEST.
(Refer to 5 - BRAKES - STANDARD PROCEDURE)
7.
AUTOMATIC SWAY BAR SYSTEM MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Automatic Sway Bar System Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
8.
WIRELESS CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Wireless Control Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
9.
OCCUPANT RESTRAINT CONTROLLER MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Occupant Restraint Controller Module harness connectors.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
10.
OCCUPANT CLASSIFICATION MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE:
If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Occupant Classification Module harness connectors.
Turn the ignition on.
With the scan tool, record and erase TIPM DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTCs.
Does the scan tool display U0001–CAN C BUS CIRCUIT as active?
Yes
No
11.
(D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Totally Integrated Power Module C1 harness connector.
Turn the ignition on.
Measure the voltage between the (D65) CAN C Bus (+) circuit and ground.
Is there any voltage present?
Yes
No
12.
(D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (D64) CAN C Bus (-) circuit and ground.
Is there any voltage present?
Yes
No
13.
(D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (D65) CAN C Bus (+) circuit.
Is any resistance present?
Yes
No
14.
(D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes
No
15.
(D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT
Measure the resistance between the (D65) CAN C Bus (+) circuit and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes
No