GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2008 🢒 WM Sedan 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B0193

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 Descriptors

DTC B0193 06: Blower Motor not Operating, Short to Ground or Open Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Blower Motor control

B0193 06

B0193 06

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Circuit Description

The blower motor speed control, battery positive and ground circuits enable the control module to operate. The HVAC control module provides a pulse width modulation signal to the blower motor in order to command the blower motor speed.

Conditions for Running the DTC
    • The ignition is ON.
    • Ignition voltage is between 9-16 volts.
    • The HVAC module is ON.

Conditions for Setting the DTC

The blower motor draws more amperage than the HVAC control module is calibrated for.

Conditions for Clearing the DTC
    • The condition for setting the DTC is no longer present.
    • The DTC can be cleared using a scan tool.

Reference Information

Schematic Reference

HVAC 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

Circuit/System Verification

Ignition ON, operate the blower fan speed(s).

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the blower motor.
  2. Ignition ON, connect test lamp at the battery positive voltage terminal A and ground.
    3. ⇒If the test lamp does not illuminate, test the battery positive voltage circuit for short to ground or an open/high resistance.
  3. Connect test lamp between the battery positive voltage terminal A and the control circuit terminal B. The test lamp should dimly illuminate at high speeds and reduce in intensity as the blower speed is reduced.
    4. ⇒If the test lamp does not illuminate. Test the control circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the HVAC control module.
    ⇒ If the test lamp stays illuminated all the time. Test the control circuit for short to ground. If the circuit tests normal, replace the HVAC control module.
    ⇒If the test lamp does illuminate and change intensity. Test or replace the blower motor..

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    • Refer to Blower Motor Replacement
    •  Control Module References for HVAC control module replacement, setup, and programming