STOCK D15b2 CEL Question
 

I have a 90 dx ciivic hatch odb0.
I cell will pop every once in a while.
I jumped the service connector (small Blue connector) and turned on the ignition.

Red light thru service window on ecu blinks one rapid pulse then pauses and then blinks rapidly 16 more times.

What code is this ?

I used this as a guide

Pre OBDI ECUs
To read the codes, turn the ignition on and look at the LED inside the ECU. The LED is visible through a small plastic window in the top of the ECU. The ECU can signal simultaneous problems by blinking separate codes, one after the other. Problem codes 1 - 9 are indicated by 1 - 9 flashes, problem codes over 9 use one long flash as ten short flashes.