1. Disconnect the engine and automatic transaxle. (ATX) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION.)
2. Disconnect the engine and manual transaxle. (MTX) (See MANUAL TRANSAXLE REMOVAL/INSTALLATION.)
3. Remove the intake-air system. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)
4. Remove the exhaust system. (See EXHAUST SYSTEM REMOVAL/INSTALLATION.)
5. Remove the generator.
6. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION.)
7. Remove the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION.)
8. Assemble in the reverse order of disassembly.
Mazda 6 Service Manual: No.5 tcs off light does not illuminate 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 ...
Mazda 6 Service Manual: Ignition switch inspection
1. Disconnect the negative battery cable.
2. Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION)
3. Disconnect the ignition switch connectors.
4. Inspect for continuity between the ignition switch terminals using an
ohmmeter.
If not as specified, replace the ignition switch.
...