U1004

U1004-CAN C BUS TRANSMIT PERFORMANCE







- When Monitored:
With the ignition on.

- Set Condition:
When the Anti-Lock Brake Module detects invalid CAN message from the Dynamics Sensor.





1. CHECK FOR A DTC U1004-CAN C BUS TRANSMIT PERFORMANCE

NOTE: This DTC must be active for the results of this test to be valid.

1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
4. With the scan tool, erase DTCs.
5. Cycle the ignition switch from off to on.
6. With the scan tool, read and record DTCs

Does the scan tool display: U1004-CAN C BUS TRANSMIT PERFORMANCE?

Yes

- Go To 2

No

- Perform the ABS-INTERMITTENT CONDITION TEST ABS Intermittent Condition Test.

2. CHECK THE WIRING HARNESS, TERMINALS, AND CONNECTORS
1. Check the Dynamic Sensor installation and torque of the mounting bolts.
2. Visually inspect the related wiring harness. Look for any bruised, chafed, pierced, or partially broken wires.
3. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 3

3. CHECK THE (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Dynamics Sensor harness connector.
3. Disconnect the Anti-Lock Brake Module harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (D465) Dynamics Sensor High Data Link circuit.

Is there any voltage present?

Yes

- Repair the (D465) Dynamics Sensor High Data Link circuit for a short to voltage.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 4

4. (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT SHORT TO GROUND




1. Turn the ignition off.
2. Measure the resistance between ground and the (D465) Dynamics Sensor High Data Link circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (D465) Dynamics Sensor High Data Link circuit for a short to ground.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 5

5. CHECK THE (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D465) Dynamics Sensor High Data Link circuit.

Is the resistance below 5.0 ohms?

Yes

- Go To 6

No

- Repair the (D465) Dynamics Sensor High Data Link circuit for an open.
- Perform ABS VERIFICATION TEST ABS Verification Test.

6. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE




1. Turn the ignition on.
2. Measure the voltage of the (D464) Dynamics Sensor Low Data Link circuit.

Is there any voltage present?

Yes

- Repair the (D464) Dynamics Sensor Low Data Link circuit for a short to voltage.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 7

7. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Measure the resistance between ground and the (D464) Dynamics Sensor Low Data Link circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (D464) Dynamics Sensor Low Data Link circuit for a short to ground.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 8

8. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D464) Dynamics Sensor Low Data Link circuit.

Is the resistance below 5.0 ohms?

Yes

- Replace the Dynamics Sensor.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Repair the (D464) Dynamics Sensor High Data Link circuit for an open.
- Perform ABS VERIFICATION TEST ABS Verification Test.