Section 4
TM9-2320-363-20-1
TROUBLESHOOTING
CHARTS
E. CODE 22- THROTTLE POSITION SENSOR (TPS) SIGNAL VOLTAGE LOW (Cont’d.)
STEP/SEQUENCE
22-13 Check for Outside
DDEC Battery +
l Turnignition off.
l Remove ECM 6-pin power
connector.
l Remove ECM vehicle harness.
l Turn ignition on.
l Read voltage A3 to a
good ground.
l Read voltage C3 to a
good ground.
22-30
Verify Repairs
l Turnignition off.
l Reconnect all connectors.
l Turn ignition on.
l Clear codes.
l Note status of “Check Engine”
light.
l If "check Engine” light does not
stay on, start engine and run until
“Check Engine” light comes on
or 1 minute.
l Stop engine.
l Read all codes.
RESULT
WHAT TO DO NEXT
All readings
Go to 22-9.
less than 4.0 volts.
Either reading
Outside power is spliced into
greater than or equal
either (ckt #952) or (ckt #916).
to 4.0 volts.
Remove splice. Then go to
22-30.
Code 25 (no codes).
Repairs are complete.
Code 22 (and
All system diagnostics are
any other codes).
complete. Please review this
section from the first step to find
the error.
Any other codes
Go to START-1, page 3-121,
except Code 22.
to service other codes.
3-235
