Chrysler 300M 1999 Manual page 439

TEST 11A
CONTINUED - REPAIRING INOPERATIVE CONTROL HEAD SWITCH
TEST 11A
CONTINUED FROM
THE PREVIOUS
PAGE.
OBSERVE THE "MODE
SWITCH MUX"
VOLTAGE.
*Perform Verification TEST VER-2A.
USING THE DRB
ENTER "BODY
COMPUTER" THEN
"SENSORS" AND...
PRESS AND HOLD THE
A/C SWITCH.
**Check connectors - Clean / repair as necessary.
429
DID THE VOLTAGE DROP
TO APPROXIMATELY 0.4 NO
VOLTS WHEN THE
SWITCH WAS PRESSED?
YES
REPLACE THE
A/C-HEATER CONTROL
HEAD.*
SWITCH IS
OPERATING PROPERLY
AT THIS TIME...
CHECK THE FAN OFF
CKT FOR AN OPEN CKT
(IF BCM THINKS FAN
IS OFF IT WILL NOT
TURN ON A/C LED).
M
A
N
U
A
L
T
E
M
P
E
R
A
T
U
R
E
C
O
N
T
R
O
L
S
Y
S
T
E
M