1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16

Code 21: TP Sensor Circuit (Scan)
(2 of 2)
1
•
•
THROTTLE CLOSED.
IGNITION “ON.”
DOES SCAN TOOL INDICATE THROTTLE
POSITION SENSOR VOLTAGE GREATER
THAN 4 VOLTS OR LESS THAN .36 VOLT?
YES
NO
CODE 21 IS INTERMITTENT, REFER TO
“DIAGNOSTIC AIDS” ON FACING PAGE.
VOLTAGE LESS THAN .36 VOLT.
VOLTAGE GREATER THAN 4 VOLTS.
•
•
IGNITION “OFF.”
2
•
•
IGNITION “OFF.”
DISCONNECT THROTTLE POSITION
SENSOR CONNECTOR.
IGNITION “ON.”
DOES SCAN TOOL INDICATE
VOLTAGE OVER 4 VOLTS?
DISCONNECT THROTTLE POSITION SENSOR
ELECTRICAL CONNECTOR. JUMPER THROTTLE
POSITION SENSOR HARNESS TERMINALS “A” AND “C”
TOGETHER.
•
•
•
IGNITION “ON.”
SCAN TOOL SHOULD INDICATE THROTTLE
POSITION SENSOR VOLTAGE GREATER THAN 4 VOLTS.
DOES IT?
NO
YES
NO
YES
•
•
IGNITION “OFF.”
3
CONNECT DVOM
BETWEEN THROTTLE
POSITION HARNESS
CONNECTOR
TERMINALS “C” AND
“A.” VOLTAGE
CKT 417 SHORTED
TO VOLTAGE
OR
REPLACE THROTTLE
POSITION SENSOR.
CONNECT DVM BETWEEN
THROTTLE POSITION SENSOR
HARNESS TERMINAL “A” AND
GROUND.
IGNITION “ON.”
IS VOLTAGE OVER 4 VOLTS?
FAULTY ECM
CONNECTION
OR
•
FAULTY ECM.
SHOULD BE GREATER
THAN 4 VOLTS.
IS IT?
NO
YES
CKT 416 OPEN
OR
FAULTY ECM CONNECTION
OR
THROTTLE POSITION
SENSOR SIGNAL (CKT
417) OPEN OR
SHORTED TO
GROUND
OR
FAULTY CONNECTION
AT ECM
OR
FAULTY ECM.
YES
NO
REPLACE THROTTLE
POSITION SENSOR
OPEN SENSOR GROUND
CKT 813
OR
FAULTY ECM
CONNECTION
OR
FAULTY ECM.
FAULTY ECM.
Index
90-823224--2  796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-103
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1993, 1994, 1995, 1996, 1997
Download File
Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step.
- 930 pages
Document File TypePDF
CopyrightAttribution 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.
Submit your review (optional)
(will not be displayed)
12345
* Required Field
1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 SKU UPC Model
Nick on Aug 13, 2018. Exactly what I was looking for!

Hugely helpful service manual! Perfect. Thank you!
Sonthaya Traipug on May 04, 2018. Freelance Yachts Service

Manuals are all Important for Technician
Glenn on Dec 02, 2015. Nice

This book is invaluable if you do your own repairs. Great book.
Joseph on Oct 04, 2015. 1997 7.4l Bravo

Could not find a copy until a search brought me here.
Excellent print.
Thank you

Leave a Reply

Your email address will not be published. Required fields are marked *

*
*
Website