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

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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

** 

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