U1104–CAN C BUS CRC PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
Possible Causes
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WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
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(D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT SHORTED TO GROUND, VOLTAGE, OR OPEN
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(D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT SHORTED TO GROUND, VOLTAGE, OR OPEN
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DYNAMICS SENSOR INSTALLATION
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DYNAMICS SENSOR
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Diagnostic Test
1.
VERIFY DTC IS ACTIVE
Turn the ignition on.
With the scan tool, read and record ABS DTCs.
With the scan tool, read and record Environmental Data (EV Data).
With the scan tool, erase ABS DTCs.
Cycle the ignition switch.
With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
No
-
The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced,
pinched, or partially broken wires.
-
Refer to the ABS-INTERMITTENT CONDITION TEST.
(Refer to 5 - BRAKES - DIAGNOSIS AND TESTING).
2.
CHECK THE DYNAMICS SENSOR INSTALLATION
NOTE:
Dynamics Sensor installation and mounting bolt torque is crucial for proper operation.
Turn the ignition off.
Check the Dynamics Sensor for damaged, modified, and bent mounting brackets.
Check the Dynamics Sensor mounting bolts for a loose or over tightened condition.
Were any problems found?
Yes
No
3.
INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS
Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.
Were any problems found?
Yes
No
4.
CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE
Disconnect the Anti-Lock Brakes Module harness connector.
Disconnect the Dynamics Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (D52) Dynamics Sensor High Data Link circuit.
Is there any voltage present?
Yes
No
5.
CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Measure the resistance of the (D52) Dynamics Sensor High Data Link circuit between ground and the Dynamics Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes
No
6.
CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPEN
Measure the resistance of the (D52) Dynamics Sensor High Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.
Is the resistance below 5.0 ohms?
Yes
No
7.
CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition on.
Measure the voltage of the (D51) Dynamics Sensor Low Data Link circuit.
Is there any voltage present?
Yes
No
8.
CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Measure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between ground and the Dynamics Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes
No
9.
CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPEN
Measure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.
Is the resistance below 5.0 ohms?
Yes
No