Chrysler 300M 1999 Manual page 639

REPAIRING AUTOMATIC TEMPERATURE CONTROL MODULE NO RESPONSE OR
TEST 3A
ATC MESSAGES NOT RECEIVED TROUBLE CODE
Perform TEST 1A Before Proceeding
START TEST 3A.
KEY OFF.
REMOVE AND INSPECT
FUSE #17.
FIG. 1
USING AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE FUSED
IGNITION SWITCH
OUTPUT CKT. FIG. 1
DISCONNECT THE
AUTOMATIC
TEMPERATURE CONTROL
(ATC) HEAD HARNESS
CONNECTOR.**
*Perform Verification TEST VER-2A.
NOTE: FOR LOCATION
OF ALL COMPONENTS.
SEE GENERAL INFO 4.0
USING AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE FUSED
IGNITION SWITCH
OUTPUT CKT. FIG. 2
**Check connectors - Clean / repair as necessary.
629
NO
IS THE FUSE OPEN?
YES
IS THE RESISTANCE NO
BELOW 5.0 OHMS?
YES
IS THE RESISTANCE YES
BELOW 5.0 OHMS?
NO
CONTINUE TEST
3A ON THE NEXT
PAGE.
REPLACE FUSE #17.*
REPAIR THE FUSED
IGNITION SWITCH
OUTPUT CIRCUIT FOR A
SHORT TO GROUND AND
REPLACE FUSE #17.*
REPLACE THE
AUTOMATIC
TEMPERATURE
CONTROL HEAD AND
REPLACE FUSE #17.*
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