IHKS Control System Diagnosis

IHKS CONTROL SYSTEM DIAGNOSIS

Start all diagnosis of the IHKS control system with the "IHKS Function Check." The function check leads to a specific chart or test. Finish all diagnosis by repeating the "IHKS Function Check "to ensure correct diagnosis.

Some diagnostic procedures require the ignition switch to remain On for extended periods of time. Low battery voltage may result, causing incorrect voltage readings. If vehicle system voltage becomes low, connect a battery charger to the electrical system and apply a slow charge while testing.

Most intermittent failure, check suspect circuits for:

- Poor mating of connector halves or terminals backed out.
- Improperly formed or damaged terminals.
- Dirt or corrosion on the terminals.
- Poor terminals-to-wire connection.

IHKS Function Check

The following procedures check the IHKS control system. All the steps can be performed without using tools. Detailed diagnostic procedures follow the system check and are referenced in each step.

Complete this check with the temperature outside the vehicle at 60°F or higher, and with the engine running.











IHKS SYSTEM DIAGNOSIS