Circuit Description
The longitudinal accelerometer is used to determine straight-line acceleration. This information is used when calculating the desired traction control in AWD applications.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0192 All Wheel Drive (AWD)/Four Wheel Drive (4WD) Reference Accelerometer Circuit
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .
Symptom Type | Symptom Type Descriptor |
|---|---|
00 | No Additional Information |
1A | Bias Level Out of Range |
Conditions for Running the DTC
| • | The ignition is ON. |
| • | Ignition voltage is greater than 8 volts. |
Conditions for Setting the DTC
C0192 00
The code is set when the following conditions exist:
| • | The longitudinal sensor signal voltage is below 0.18 volt or above 4.84 volts for 30 milliseconds. |
| • | The longitudinal sensor does not pass an internal self check test when the ignition is turned ON. |
C0192 1A
The longitudinal sensor is self calibrated for temperature changes. If the calibration bias exceeds 0.5 g, the DTC is set.
Action Taken When the DTC Sets
| • | The traction control system (TCS) is degraded. |
| • | The TCS indicators turn ON. |
| • | The antilock brake system (ABS) remains functional. |
Diagnostic Aids
Thoroughly inspect connections and wiring that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents , Wiring Repairs , and Connector Repairs .
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for the proper voltage output on the 5-volt reference circuit and the proper operation of the signal circuit.
-
This step tests for possible low 5-volt reference output or a problem with the signal circuit.
-
This step tests for a short to voltage on the 5-volt reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system if equipped.
-
This step tests for a problem with the low reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system if equipped.
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
Does the scan tool indicate that the longitudinal accelerometer parameter is in between the specified voltage range? | 4.5-5.5 V | Go to Step 8 | Go to Step 3 | |||||||
With the 3-amp fused jumper wire still connected, does the scan tool indicate that the longitudinal accelerometer parameter is in below the specified voltage value? | 4.5 V | Go to Step 5 | Go to Step 4 | |||||||
Test the longitudinal accelerometer 5-volt reference circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 7 | |||||||
5 | Test the longitudinal accelerometer 5-volt reference circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 6 | ||||||
6 | Test the longitudinal accelerometer signal circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 | ||||||
7 | Test the longitudinal accelerometer signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 | ||||||
Test the longitudinal accelerometer low reference circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 9 | |||||||
9 | Inspect for poor connections at the harness connector of the yaw rate and lateral accelerometer sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 | ||||||
10 | Replace the yaw rate and lateral accelerometer sensor. Refer to Brake Pressure Modulator Valve Pressure Sensor Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
11 | Replace the electronic brake control module (EBCM). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
12 |
Does the DTC reset? | -- | Go to Step 2 | System OK | ||||||
