See Figures 1 and 2
The latch relay is located on the right inner fender panel. This relay is initially energized during engine startup and remains energized until 3-5 seconds after the engine is stopped. This enables the ECU to extend the idle speed stepper motor for the next startup, then cease operation.
A relay in the de-energized position should have continuity between terminals 87A and 30. Resistance values between terminals 85 and 86 is 70-80 ohms for resistor relays and 81-91 ohms for diode relays. Not all relays have battery voltage connected to terminal 30. Some may have battery voltage connected to terminals 87 or 87A.