Chrysler New Yorker. Manual — part 451

TEST 3A

CONTINUED - REPAIRING “A/C CONTROL EBL SWITCH FAILURE” TROUBLE CODE

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TEST 3A

CONTINUED - REPAIRING “A/C CONTROL EBL SWITCH FAILURE” TROUBLE CODE

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST 3A

PRESS AND RELEASE

CONTINUED FROM THE REAR

DEFOGGER DOES

THE BUTTON

YES

REPLACE THE

THE PREVIOUS

BUTTON SEVERAL

SEEM TO STICK AT

A/C-HEATER CONTROL

PAGE.

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

REAR DEFOGGER

OBSERVE THE "MODE

IS THE VOLTAGE

YES

OPERATING PROPERLY

SWITCH ON THE

SWITCH MUX"

APPROXIMATELY 0.25

AT THIS TIME.

A/C-HEATER CONTROL

VOLTAGE.

VOLTS?

RETRY THE SYSTEM

HEAD.

AND RECHECK DTC’s.

NO

REPLACE THE

A/C-HEATER CONTROL

HEAD.*

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TEST 4A

REPAIRING

(

A/C CONTROL BLEND DOOR INPUT OPEN OR SHORTED TO GROUND

(

TROUBLE CODE

Perform TEST 1B Before Proceeding

FIG. 1

FIG. 2

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TEST 4A

REPAIRING

(

A/C CONTROL BLEND DOOR INPUT OPEN OR SHORTED TO GROUND

(

TROUBLE CODE

Perform TEST 1B Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TURN THE IGNITION

ON.

START TEST 4A.

ERASE THE TROUBLE

CODE.

DISCONNECT THE

USING A VOLTMETER,

REPAIR THE OPEN

A/C-HEATER "C1"

MEASURE THE FUSED

IS THE VOLTAGE

NO

FUSED IGNITION

HARNESS CONNECTOR.**

IGNITION SWITCH

ABOVE 10.0 VOLTS?

SWITCH OUTPUT

OUTPUT CIRCUIT.

CIRCUIT.*

FIG. 1

FIG. 1

YES

KEY OFF. DISCONNECT

USING AN OHMMETER,

REPAIR THE

THE BODY CONTROL

MEASURE BETWEEN

IS THE RESISTANCE

YES

TEMPERATURE SELECT

MODULE C2 HARNESS

GROUND AND THE TEMP

BELOW 50.0 OHMS?

SIGNAL CIRCUIT FOR

CONNECTOR.**

SELECT SIGNAL CKT.

A SHORT TO

SEE GENERAL INFO 4.0

FIG. 1

GROUND.*

NO

WITH AN OHMMETER,

REPAIR THE

MEASURE BETWEEN

IS THE RESISTANCE

YES

TEMPERATURE SELECT

SENSOR GROUND CKT

BELOW 5.0 OHMS?

SIGNAL CIRCUIT FOR

AND THE TEMP SELECT

A SHORT TO SENSOR

SIGNAL CKT. FIG. 1

GROUND CIRCUIT.*

NO

CONNECT A JUMPER USING AN

OHMMETER,

WIRE BETWEEN THE

MEASURE BETWEEN

IS THE RESISTANCE

NO

REPAIR THE OPEN

TEMPERATURE SELECT GROUND

AND THE

BELOW 5.0 OHMS?

TEMPERATURE SELECT

SIGNAL CKT AND

TEMP SELECT SIGNAL

SIGNAL CIRCUIT.*

GROUND. FIG. 2

CKT. FIG. 1

YES

REMOVE THE JUMPER

WIRE. RECONNECT

TURN THE IGNITION

THE A/C-HEATER ON.

CONTROL "C1"

HARNESS CONNECTOR.

USING A VOLTMETER,

MOVE THE

DOES THE VOLTAGE

MEASURE THE

TEMPERATURE

CHANGE SMOOTHLY FROM NO

REPLACE THE

TEMPERATURE SELECT CONTROL FROM

COLD APPROXIMATELY 1.0V A/C-HEATER

CONTROL

SIG CKT (CAV 12).

TO HOT.

(FULL COLD) TO 10.0

HEAD.*

FIG. 2

VOLTS (FULL HOT)?

YES

REPLACE THE BODY
CONTROL MODULE.*

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405