Disconnect injection plug connection.
Connect an ohmmeter and measure the resistance of the cold start valve. The resistance must be:
- engine displacement 1.3 l: 4.0-4.5 ohms
- engine displacement 1.6 l 4A-FE: 3.0-5.0 ohm
- engine displacement 1.6 l 4A-GE: 2.0-4.0 ohm
If the measured resistance value differs from the specified value, the valve must be replaced.
In order to check the injection jet and the tightness of the valve, special tools are required, available only in TOYOTA specialist workshops.