Testing & Diagnosis: Precautions
- No repairs or adjustments can be made to the ECA. If diagnosis shows ECA is not functioning properly, it must be replaced.
- Shorting the wiring harness across a solenoid valve can burn out circuitry in the ECA that controls the solenoid valve actuator.
- The EEC-IV system contains transistors which CANNOT tolerate excessive voltage surges or transient voltage. Never try to jump-start the vehicle with 24 volts.