TB 9-2320-335-13&P
ELECTRONIC SPEEDOMETER SYSTEM
DIAGNOSTIC FLOWCHART
FROM 2
Page 2-56
3
TEST OPTIONS
KNOWN INFO
SPEEDOMETER
DOES SENDER GENERATOR CIRCUIT HAVE
INOPERATIVE
OTHER GAUGES
OPERATE NORMALLY
SPEEDOMETER
HAS POWER
REASON FOR QUESTION
SPEEDOMETER HAS
No resistance indicates an open
GROUND
wiring harness or sender
REPLACE
POSSIBLE PROBLEMS
generator.
SENDER GENERATOR
OPEN
(Para. 5-17.1)
High resistance indicates a short.
SHORT
or REPLACE
NO
Less than 5 ohms indicates
SPEEDOMETER
SPEEDOMETER WIRING
SENDER GENERATOR
HARNESS
SPEEDOMETER
(Para. 4-18.1).
YES
DRIVEN GEAR
4
TEST OPTIONS
KNOWN INFO
VISUAL
SPEEDOMETER
ARE SPEEDOMETER DRIVE GEARS GOOD?
INOPERATIVE
OTHER GAUGES
OPERATE NORMALLY
SPEEDOMETER
HAS POWER
REASON FOR QUESTION
SPEEDOMETER HAS
Stripped or broken speedometer
GROUND
driven gear will cause sender
NO OPEN CIRCUIT
generator to be inoperative.
POSSIBLE PROBLEMS
REPLACE
SPEEDOMETER
SPEEDOMETER
NO
DRIVEN GEAR
SPEEDOMETER
(Para. 5-17.2).
DRIVEN GEAR
YES
REPLACE
SPEEDOMETER
(Para. 4-17.1).
END
OF TEST
2-36