1. Remove the variable tumble control solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)
2. Inspect airflow between the ports under the following conditions.
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)
2. Inspect the following wiring harness for open or short (continuity check).
Open circuit
- Variable tumble control solenoid valve terminal B (harness-side) and PCM terminal 4T
- Variable tumble control solenoid valve terminal A (harness-side) and main relay terminal C (harness-side)
Short circuit
- Variable tumble control solenoid valve terminal B (harness-side) and body GND
- Variable tumble control solenoid valve terminal A (harness-side) and power supply
Mazda 6 Service Manual: Rear brake (disc) inspection
Brake Judder Repair Hint
1. (See FRONT BRAKE (DISC) INSPECTION.)
Disc Plate Thickness Inspection
Caution
Excessive runout may result if the disc plate is removed from the
vehicle then machined. Machine the disc plate while installed on the
vehicle.
1. Measure the thickness of the dis ...
Mazda 6 Service Manual: No.8 brake system warning light stays on more than 4 seconds with ignition
switch on
Diagnostic procedure
When performing an asterisked (*) troubleshooting inspection, shake the
wiring harness and connectors while doing the inspection to discover whether
poor contact points are the cause of any intermittent malfunction. If there
is a problem, check to make sure co ...