Chrysler New Yorker. Manual — part 449

TEST 1B

IDENTIFYING CLIMATE CONTROL TROUBLE CODES

Perform TEST 1A Before Proceeding

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TEST 1B

IDENTIFYING CLIMATE CONTROL TROUBLE CODES

Perform TEST 1A Before Proceeding

1. Record and erase the trouble code(s).

2. Turn the blower on, set the temperature control at mid position, start the engine, then using the

DRB select ‘‘Body Computer’’ ‘‘Read DTCs’’.

c

If no code appears, slowly run the control from cold to hot, then back to cold while looking for
BCM codes. If a code appears, perform the indicated test from the list below.

c

If a code still does not appear, continue by turning the temperature control from cold to hot, then
back to cold. Turn the mode switch to each position, waiting 30 seconds between each one.
Momentarily press the A/C and Rear Defog buttons. Upon seeing the first code appear, erase
the code and perform the indicated test from the list below.

NOTE: If multiple codes appear, repair any that relate to a short circuit first. If a short to battery code
is set, all 4 ‘‘Output Shorted to Battery’’ codes will appear. It will then be necessary to isolate each
circuit to determine which circuit is at fault.

3. If no codes are seen, observe the climate system performance, then continue TEST 1A.

DIAGNOSTIC TROUBLE CODE (DTC)

PERFORM

Ambient Temperature Sensor Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘OTIS’’ TEST 2A
A/C Control A/C Switch Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 2A
A/C Control EBL Switch Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 3A
A/C Control Blend Input Open or Shorted to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 4A
A/C Control Blend Door Input Shorted to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 5A
A/C Control Mode Door Input Open or Shorted to Battery. . . . . . . . . . . . . . . . . . . . . . . . . .TEST 6A
A/C Control Mode Door Input Shorted to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 7A
Blend Door Feedback Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 3A
Blend Door Output Shorted to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 4A
Blend Door Output Shorted to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 5A
Blend Door Stall Test Failed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 3A
Common Output Shorted to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 6A
Common Output Shorted to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 5A
Evaporator Temperature Sensor Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 7A
Mode Door Feedback Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 9A
Mode Door Output Shorted to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 10A
Mode Door Output Shorted to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 5A
Mode Door Stall Test Failed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 9A
Recirculation Door Output Shorted to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 11A
Recirculation Door Output Shorted to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .‘‘ATC’’ TEST 5A
Recirculation Door Test Failed

‘‘ATC’’ TEST 12A

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TEST 2A

REPAIRING

(

A/C CONTROL A/C SWITCH FAILURE

(

TROUBLE CODE

Perform TEST 1B Before Proceeding

FIG. 1

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TEST 2A

REPAIRING

(

A/C CONTROL A/C 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 2A.

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 0.45

2A 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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