DTC C0283 w/NW7
Circuit Description
The traction control switch is a momentary-contact, normally-open switch that can be used to disable the traction control system (TCS). Each time the traction control switch is pressed, the TCS enabled/disabled status changes. When TCS is disabled, the electronic brake control module (EBCM) illuminates the traction off indicator by opening the service traction control signal circuit.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects low voltage on the traction control switch signal circuit for 10 seconds.
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the TCS. |
| • | The traction off indicator turns ON. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the antilock brake system (ABS) Diagnostic System Check? | Go to Step 2 | |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 8 |
Does the DTC set? | Go to Step 5 | Go to Step 9 | |
5 | Test the traction control switch signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the electronic brake control module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
7 |
Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | Go to Step 11 | -- |
8 | Repair the open in the ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | -- |
9 | Inspect for poor connections at the harness connector of the traction control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
10 | Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 3 | System OK |
DTC C0283 w/JL4
Circuit Description
The VSES mode switch is a momentary-contact switch that can be used to limit the VSES function. Each time the mode switch is pressed, the VSES full stability/limited status changes. When the VSES mode switch is released, voltage on the VSES mode switch signal circuit is approximately 4.5 volts. When the VSES mode switch is pressed, voltage on the VSES mode switch signal circuit is approximately 9 volts.
Conditions for Running the DTC
In order to detect a continuously low or high VSES mode switch signal:
The ignition is ON.
OR:
In order to detect a continuously pressed VSES mode switch:
| • | The ignition is ON. |
| • | The engine speed is greater than 450 RPM. |
Conditions for Setting the DTC
Either of the following conditions may cause DTC C0283 to set:
| • | The VSES mode switch signal is detected as excessively low or high for 200 milliseconds. |
| • | The VSES mode switch is detected as pressed for 60 seconds. |
Action Taken When the DTC Sets
| • | The EBCM disables the VSES. |
| • | The message center displays the SERVICE STABILITY SYSTEM message. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Press and release the VSES mode switch several times while observing the message center in order to verify that the VSES full stability/limited status changes each time the switch is pressed and that DTC C0283 does not set. Using the scan tool in order to observe the Mode Switch Pressed or Released status may also be helpful in diagnosing an intermittent fault within the switch.
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents , Testing for Intermittent Conditions and Poor Connections , Wiring Repairs and Connector Repairs in Wiring Systems.
Test Description
The number below refers to the step number on the diagnostic table.
-
This step tests for voltage on the VSES mode switch signal circuit indicating an unpressed VSES mode switch.
-
This step tests for voltage on the VSES mode switch signal circuit indicating a pressed VSES mode switch.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics . | ||||
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the DTC set? | -- | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 11 |
Does the VSES mode switch signal measure within the specified range? | 2-7 V | Go to Step 5 | Go to Step 6 | |
Does the VSES mode switch signal measure within the specified range? | 7-11 V | Go to Step 7 | Go to Step 13 | |
6 | Test the VSES mode switch signal circuit for a short to ground or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 12 |
7 |
Does the VSES mode switch signal measure within the specified range? | 2-7 V | Go to Step 9 | Go to Step 8 |
8 | Repair the open in the VSES mode switch signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 14 | -- |
9 | Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 |
10 |
Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | -- | Go to Step 14 | -- |
11 | Repair the open in the ignition 3 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 14 | -- |
12 | Inspect for poor connections at the harness connector of the VSES mode switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 13 |
13 | Replace the VSES mode switch. Did you complete the replacement? | -- | Go to Step 14 | -- |
14 |
Does the DTC reset? | -- | Go to Step 3 | System OK |
