Before attaching or detaching the PCM harness connectors, make sure the ignition
switch is OFF and the negative battery cable is disconnected
to avoid the possibility of damage to the PCM.
When performing PCM input/output signal diagnosis, remove the pin terminal
retainer from the connectors to make it easier to insert tester probes into
the connector.
When attaching or detaching pin connectors from the PCM, take care not to
bend or break any pin terminals. Check that there are no bends or breaks on
PCM pin terminals before attempting any connections.
Before replacing any PCM, perform the PCM input/output signal diagnosis to
make sure the PCM is functioning properly.
When measuring supply voltage of PCM-controlled components with a circuit
tester, separate 1 tester probe from another. If the 2 tester probes accidentally
make contact with each other during measurement, a short circuit will result
and damage the PCM.
