Visual Inspection

WARNING: This page is about a different car, the 1996 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.

Check the following and repair as necessary:

Engine Oil: check level and for evidence of leakage.
Engine Coolant: check level and for evidence of leakage.
ATF: check level, condition and for evidence of leakage.
Battery: check water level and terminal corrosion.
A/T Hoses: check for poor connections or deterioration.
Throttle Cable: excessive play or improper installation.
Harness Connectors: check for poor connections or worn insulation.
Fuses: check for improper installation or for burning.
Related Mechanical Parts: check for proper installation and condition.

If no problems are found during visual inspection, and only DTC 12 is retrieved even though a problem exists, perform a manual shifting test. See MANUAL SHIFTING TEST under TRANSMISSION SHIFT TESTING.