Discrete Input Circuit Check
(2 of 2)
OIL PRESSURE SWITCH
DISCONNECT TAN/BLU WIRE FROM OIL PRESSURE SWITCH. START ENGINE, THERE SHOULD BE
RESISTANCE (NO CONTINUITY) FROM OIL PRESSURE SWITCH AND GROUND (ENGINE BLOCK).
ENGINE OFF, IGNITION ON, CHECK RESISTANCE FROM OIL PRESSURE SWITCH AND GROUND
(ENGINE BLOCK). RESISTANCE SHOULD BE NEAR ZERO (CONTINUITY CIRCUIT).
NO
YES
DISCONNECT ECM J1 CONNECTOR FROM ECM. CHECK
FOR CONTINUITY BETWEEN J1-6 AND TAN/BLU WIRE
FROM OIL PRESSURE SWITCH
REPLACE FAULTY
SWITCH IN CIRCUIT.
YES
NO
DISCRETE INPUT CIRCUIT
FUNCTIONING PROPERLY.
DISCONNECT IN-LINE HARNESS AND CHECK CONTINUITY ON TAN/BLU
WIRE FROM OIL PRESSURE SWITCH TO IN-LINE HARNESS CONNECTOR
YES
NO
REPAIR SHORT
IN CIRCUIT.
CHECK CONTINUITY ON TAN/BLU WIRE FROM IN-LINE HARNESS
CONNECTOR TO J1-6 TERMINAL ON ECM CONNECTOR
YES
NO
REPLACE ECM
AND RETEST.
REPAIR SHORT
IN CIRCUIT.
I/O LEVEL SWITCH (GEAR LUBE MONITOR)
DISCONNECT TAN/BLU WIRE FROM I/O OIL LEVEL SWITCH. START ENGINE, CHECK RESISTANCE
FROM TAN/BLU WIRE AND BLK GROUND WIRE. RESISTANCE SHOULD BE NEAR ZERO.
NO
YES
DISCONNECT ECM J1 CONNECTOR FROM ECM. CHECK
FOR CONTINUITY BETWEEN J1-6 AND TAN/BLU WIRE
FROM OIL LEVEL SWITCH
REPLACE GEAR
LUBE BOTTLE.
YES
NO
DISCRETE INPUT CIRCUIT
FUNCTIONING PROPERLY.
DISCONNECT IN-LINE HARNESS AND CHECK CONTINUITY ON TAN/BLU
WIRE FROM OIL LEVEL SWITCH TO IN-LINE HARNESS CONNECTOR.
YES
NO
REPAIR SHORT
IN CIRCUIT.
CHECK CONTINUITY ON TAN/BLU WIRE FROM IN-LINE HARNESS
CONNECTOR TO J1-6 TERMINAL ON ECM CONNECTOR.
YES
NO
REPLACE ECM
AND RETEST.
REPAIR SHORT
IN CIRCUIT.
REFER TO REPAIR PORTION OF THIS SECTION FOR TESTING OF TRANSMISSION FLUID TEMPERATURE SWITCH.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-85
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you