DTC C0290 or C0292. Isuzu Ascender

For 1990-2009 cars only

Makes 🢒 Isuzu 🢒 2008 🢒 Ascender - 2WD 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC C0290 or C0292

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0292 : VSES Combination Sensor Circuits

The electronic brake control module (EBCM) supplies a reference voltage of 5 volts to the yaw rate sensor/lateral acceleration sensor and the steering angle sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.

Conditions for Running the DTC

•	The ignition is ON.

•	Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

The EBCM detects that the sensor supply voltage is less than 4.75 volts or greater than 5.25 volts for 30 milliseconds.

Action Taken When the DTC Sets

•	The EBCM turns OFF the 5-volt reference circuit, until the ignition is cycled.

•	The EBCM disables the traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

•	A DIC message and/or a warning message may be displayed.

Conditions for Clearing the DTC

•	The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool.

•	The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

If the yaw and lateral acceleometer sensor is disconnected, DTCs will set and the EBCM will not provide 5-volt reference.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for EBCM

Circuit/System Testing

Ignition OFF, disconnect the yaw rate and lateral acceleration sensor connector.
Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal 6 and ground.

⇒	If greater than 1 ohm, test the low reference circuit terminal 6 and the EBCM ground circuit terminal 16 for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.

Test the lateral accelerometer signal circuit terminal 2, the 5-volt reference circuit terminal 1, and the low reference circuit terminal 6 for an open/high resistance or a short to voltage or ground.

⇒	If all circuits test normal, replace the yaw rate sensor/lateral acceleration sensor, and clear the yaw rate sensor offset value in the EBCM.

⇒	If the DTC sets again after replacing the yaw rate sensor/lateral acceleration sensor, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming