For 1990-2009 cars only
DTC B0198 RHD
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 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Blower Motor Control | B0193 06 | B0193 06 | -- | -- |
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
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Ignition ON, operate the blower fan speed(s).
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the blower motor.
- Ignition ON, connect test lamp at the battery positive voltage terminal A and ground.
- 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.
| ⇒ | If the test lamp does not illuminate, test the battery positive voltage circuit for short to ground or an open/high resistance. |
| ⇒ | If the test lamp does not illuminate. Test the control circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the HVAC control module. |
| ⇒ | If the test lamp does illuminate. 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 |
