Chrysler New Yorker. Manual — part 450

TEST 2A

CONTINUED - REPAIRING

(

A/C CONTROL A/C SWITCH FAILURE

(

TROUBLE CODE

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TEST 2A

CONTINUED - REPAIRING

(

A/C CONTROL A/C SWITCH FAILURE

(

TROUBLE CODE

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST 2A

CONTINUED FROM PRESS AND RELEASE

DOES

THE BUTTON

YES

REPLACE THE

THE PREVIOUS

THE A/C BUTTON

SEEM TO STICK AT

A/C-HEATER CONTROL

PAGE.

SEVERAL TIMES. TIMES?

HEAD.*

NO

WITH THE BUTTON

WITH THE DRB READ

RELEASED IS THE

NO

REPLACE THE

THE "MODE SWITCH VOLTAGE

A/C-HEATER

CONTROL

MUX" VOLTAGE.

APPROXIMATELY 4.2

HEAD.*

VOLTS?

YES

PRESS AND HOLD THE

THE SWITCH IS

A/C SWITCH ON THE

OBSERVE THE "MODE

IS THE VOLTAGE

YES

OPERATING PROPERLY

A/C-HEATER CONTROL

SWITCH MUX"

APPROXIMATELY 0.45

AT THIS TIME.

HEAD.

VOLTAGE. VOLTS?

RETRY THE SYSTEM

AND RECHECK DTC’s.

NO

REPLACE THE

A/C-HEATER CONTROL

HEAD.*

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TEST 3A

REPAIRING

(

A/C CONTROL EBL SWITCH FAILURE

(

TROUBLE CODE

Perform TEST 1B Before Proceeding

FIG. 1

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TEST 3A

REPAIRING

(

A/C CONTROL EBL SWITCH FAILURE

(

TROUBLE CODE

Perform TEST 1B Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

PUT THE MODE

SWITCH IN THE

START TEST 3A.

RECIRC/BI-LEVEL

(FULL LEFT)

POSITION.

KEY ON.

WITH THE DRB ENTER

USING THE DRB, "BODY COMPUTER" THEN IS

THE VOLTAGE

NO

CONTINUE

TEST

ERASE THE TROUBLE

"SENSORS" AND READ

APPROXIMATELY 0.25

3A ON THE NEXT

CODE.

THE "MODE SWITCH VOLTS OR

LOWER?

PAGE.

MUX" VOLTAGE.

YES

DISCONNECT THE

A/C-HEATER CONTROL

OBSERVE THE "MODE

IS THE VOLTAGE

YES

REPLACE THE

"C1" 12-WAY HARNESS

SWITCH MUX"

APPROXIMATELY 5.0

A/C-HEATER CONTROL

CONNECTOR.** VOLTAGE.

VOLTS?

HEAD.*

FIG. 1

NO

DISCONNECT THE BODY

KEY OFF. USING AN

REPAIR THE MODE

CONTROL MODULE C2

OHMMETER, MEASURE

IS THE RESISTANCE

YES

SWITCH MUX CIRCUIT

CONNECTOR. BETWEEN GROUND

AND

BELOW 100.0 OHMS?

FOR A SHORT TO

THE MODE SWITCH

GROUND.*

EE GENERAL INFO 4.0

MUX CKT. FIG. 1

NO

WITH AN OHMMETER,

REPAIR THE MODE

MEASURE BETWEEN

IS THE RESISTANCE

YES

SWITCH MUX CIRCUIT

SENSOR GROUND AND

BELOW 5.0 OHMS?

FOR A SHORT TO THE

THE MODE SWITCH

SENSOR GROUND

MUX CKT. FIG. 1

CIRCUIT.*

NO

REPLACE THE BODY
CONTROL MODULE.*

HARNESS

**

S

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