Speedometer
Using the input/output check mode
Inspect the speedometer by setting it in the input/output check mode DTC 12.
Using a speedometer tester
1. Adjust the tire air pressure to the specification.
2. Using a speedometer tester, verify that the speedometer indication is within the allowable ranges shown below.
3. Verify that fluctuation of the speedometer needle is within the allowable range.
- If the ABS (ABS/TCS) HU/CM (vehicles with ABS (ABS/TCS), DSC HU/CM (vehicles with DSC), PCM (vehicles without ABS) and related wiring harness are normal, replace the instrument cluster.
Needle fluctuation allowable range Within 3.0 km/h
Tachometer
Using the input/output check mode
Inspect the tachometer by setting it in the input/output check mode DTC 13.
Using the SSTs (WDS or equivalent)
Caution
1. Connect the SSTs
(WDS or equivalent) to the vehicle DLC-2 16-pin connector.
2. Access and monitor PIDs by SSTs
(WDS or equivalent).
Fuel Gauge
Inspect the fuel gauge by setting it in the input/output check mode DTC 23.
Water Temperature Gauge
Inspect the water temperature gauge by setting it in the input/output check mode DTC 25.
Mazda 6 Service Manual: Variable air duct (vad) control solenoid valve inspection (l3)
1. Remove the VAD control solenoid valve. (See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION.)
2. Inspect airflow between the ports under the following conditions.
If not as specified, replace the VAD control solenoid valve.
If as specified, carry out the Circuit Open/Short Inspection.
Circ ...
Mazda 6 Service Manual: A/c unit removal/installation
1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See RECOVERY.) (See CHARGING.)
3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT.)
4. Remove the dashboard. (See DASHBOARD REMOVAL/INSTALLATION.)
5. Remove the theft-deterrent control module. (See ...