Circuit Description
The EBTCM learns the steering wheel center position in every drive cycle. Once established, the steering wheel center position should remain fairly constant.
Conditions for Setting the DTC
All of the following conditions occur:
| • | The ignition is ON. |
| • | The steer rate (speed that the steering wheel appears to be turning) exceeds the limits set by the EBTCM. |
Action Taken When the DTC Sets
| • | A malfunction DTC is stored. |
| • | Stabilitrak® is disabled. |
| • | The DIC displays the SERVICE STABILITY SYS message. |
| • | The ABS/TCS remain functional. |
Conditions for Clearing the DTC
| • | The condition for DTC is no longer present and you used scan tool Clear DTCs function. |
| • | The condition for DTC is no longer present and you used the On-Board Clear DTCs function. |
| • | The EBTCM does not detect the DTC in 50 drive cycles. |
Diagnostic Aids
| • | Inspect the vehicle for proper alignment. The car should not pull in either direction while driving straight on a flat surface. |
| • | Find out from the driver under what conditions the DTC was set (when the DIC displayed the SERVICE STABILITY SYS message). This information will help in order to duplicate the failure. |
| • | Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. |
| • | Poor connections, broken insulation, or a break in the wire inside the insulation may cause an intermittent malfunction. |
| • | If an intermittent malfunction exists, refer to Intermittents and Poor Connections in Wiring Systems. |
| • | The snapshot function on the scan tool can help find an intermittent DTC. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 |
Are DTCs C1282-C1285 present? | -- | Go to Step 3 | |
3 |
Did Digital SWPS Phase A and Digital SWPS Phase B change states as the steering wheel was rotated? | -- | Go to Step 4 | Go to Step 6 |
4 |
Did Digital SWPS Phase A and Digital SWPS Phase B change states as the steering wheel was rotated? | -- | Go to Step 5 | Go to Step 6 |
5 | Perform the Steering Position Sensor Test. Refer to Scan Tool Diagnostics . Was the Steering Position Sensor Test passed? | -- | Go to Step 21 | Go to Step 6 |
6 |
Is the voltage greater than the specified value? | 1 V | Go to Step 7 | Go to Step 8 |
7 | Repair the short to voltage in CKT 1763. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
8 | Use a J 39200 DMM in order to measure the voltage between the J 39700 terminal 4 and terminal B. Is the voltage greater than the specified value? | 1 V | Go to Step 9 | Go to Step 10 |
9 | Repair the short to voltage in CKT 1764. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
10 |
Is the resistance within the specified range? | OL (Infinite) | Go to Step 12 | Go to Step 11 |
11 | Repair the short to ground in CKT 1763. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
12 | Use a J 39200 DMM in order to measure the resistance between the J 39700 terminal 4 and terminal B. Is the resistance within the specified range? | OL (Infinite) | Go to Step 14 | Go to Step 13 |
13 | Repair the short to ground in CKT 1764. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
14 | Use a J 39200 DMM in order to measure the resistance between the J 39700 terminal 20 and terminal 4. Is the resistance within the specified range? | OL (Infinite) | Go to Step 16 | Go to Step 15 |
15 | Repair the short between CKT 1763 and CKT 1764. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
16 |
Is the resistance less than the specified value? | 2 ohms | Go to Step 18 | Go to Step 17 |
17 | Repair the open in CKT 1763. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
18 |
Is the resistance less than the specified value? | 2 ohms | Go to Step 20 | Go to Step 19 |
19 | Repair the open in CKT 1764. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
20 | Replace the steering wheel position sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement in Variable Effort Steering. Is the replacement complete? | -- | Go to Step 21 | -- |
21 |
Did DTC C1287 reset as a current DTC? | -- | Go to Step 22 | Go to Diagnostic System Check |
22 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
