Troubleshooting Flowchart - Spool Valve - Honda Acura NSX 1991 Service Manual

VTEC
(Front) or
Disconnect the 2P connector from
t h e spool valve.
Check for continuity between YEL
(Front)
or BLUNEL (Rear) terminal
and body ground.
Y E S
Connect the ECU test harness.
Check for continuity between YEL
(Front) or BLU/YEL (Rear) terminal
and F5 (Front) or F7 (Rear)
terminal.
Does continuity exist 1
YES
(Rear) Check Engine indicates code 2 1
Replace the spool valve.
F5 (Front)
Repair open in YEL (Front) or
N O
ECU and spool valve connector.
(Front) or 5 1 (Rear): A problem in the Spool
YEL (Front) or
F7 (Rear)
YEL (Front) or
6-15