For 1990-2009 cars

## 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 Circuit

### Diagnostic 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

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.

⇒ | 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.

⇒ | 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