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TEST 21A
REPAIRING LEFT SEAT HEAT OUTPUT OPEN TROUBLE CODE
Perform TEST 1A Before Proceeding
START TEST 21A.
KEY OFF.
DISCONNECT THE
MHSMM "C3" HARNESS
CONNECTOR.**
DISCONNECT THE LEFT
SEAT CUSHION HEATER
4-WAY HARNESS
CONNECTOR.**
FIG. 2
THE MHSMM "C3" CONN
AND LEFT SEAT
CUSHION HEATER 4-WAY
CONN (HARNESS SIDE).
FIG. 3
USING AN OHMMETER,
MEASURE BETWEEN
THE LEFT SEAT
HEATER B(+)
DRIVER...
*Perform Verification TEST VER-4A.
NOTE: FOR LOCATION
OF ALL COMPONENTS
SEE GENERAL INFO 4.0
USING AN OHMMETER,
MEASURE THE LEFT
SEAT HEATER B(+)
DRIVER (CAV 12).
FIG. 1
USING AN OHMMETER,
MEASURE THE LEFT
SEAT HEATER B(+)
DRIVER CIRCUIT
BETWEEN...
AND THE HEATED
SEAT DRIVER
CIRCUITS (CAVITIES
A & B).
FIG. 2
**Check connectors - Clean / repair as necessary.
477
IS THE RESISTANCE
YES
BELOW 8.5 OHMS?
NO
IS THE RESISTANCE
NO
BELOW 5.0 OHMS?
YES
IS THE RESISTANCE
NO
BELOW 2.5 OHMS?
YES
REPLACE THE MEMORY
HEATED SEAT/MIRROR
MODULE.*
REPAIR THE OPEN
LEFT SEAT HEATER
B(+) DRIVER
CIRCUIT.*
REPLACE THE SEAT
CUSHION.*
CONTINUE TEST
21A ON THE NEXT
PAGE.
M
E
M
O
R
Y
S
Y
S
T
E
M
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