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Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
No communication with the remote climate control module - EATC
  • Circuit open/short.
  • Remote climate control module communication network.
 Go To PINPOINT TEST E .
The EATC system is inoperative, intermittent or incorrect operation
  • Circuit open/short.
  • Input sensor(s)/erratic input signals.
  • Charging system.
  • In-car temperature sensor hose and elbow.
 Go To PINPOINT TEST F .
Incorrect/erratic direction of airflow from the outlets - manual climate control
  • No vacuum to the function selector switch.
  • Function selector switch leaks vacuum.
  • Air distribution door binding/stuck.
  • Vacuum line kinked/pinched.
  • Vacuum control motor.
  • A/C vacuum check valve (19A563).
  • A/C vacuum reservoir tank (19A566).
  • Vacuum control motor actuator arm not connected to the door lever.
 Go To PINPOINT TEST G .
Incorrect/erratic direction of airflow from the outlets - EATC
  • No vacuum to the remote climate control module.
  • Remote climate control module leaks vacuum.
  • Air distribution door binding/stuck.
  • Vacuum line kinked/pinched.
  • Vacuum control motor.
  • A/C vacuum check valve (19A563).
  • A/C vacuum reservoir tank (19A566).
  • Vacuum control motor actuator arm not connected to the door lever.
 Go To PINPOINT TEST H .
Insufficient, erratic, or no heat - manual climate control and EATC
  • Low engine coolant level.
  • Engine overheating.
  • Plugged or partially plugged heater core.
  • Temperature blend door binding/stuck.
  • Temperature blend door actuator (19E616).
  • Temperature blend door circuit open/shorted.
  • RCC (EATC)
  • Temperature selector switch.
 Go To PINPOINT TEST I .
The A/C does not operate/does not operate correctly
  • Open fuse.
  • A/C control relay.
  • Circuit open/short.
  • A/C low charge protection switch (19E561).
  • A/C system discharged/low charge.
  • Dual-function pressure switch (19D594).
  • A/C control.
  • Evaporator discharge air temperature sensor.
 Go To PINPOINT TEST J .
The A/C is always on
  • Circuit short.
  • A/C control.
  • A/C control relay.
  • Evaporator discharge air temperature sensor.
 Go To PINPOINT TEST K .
No operation in all the temperature settings - manual climate control
  • Open fuse.
  • Circuit open/short.
  • Temperature control switch (19C733).
  • Temperature blend door actuator (19E616).
  • Temperature blend door binding/stuck.
 Go To PINPOINT TEST L .
The blower motor does not operate - manual climate control
  • Open fuse.
  • Circuit open/short.
  • Blower motor (19805).
  • Function selector switch (19B888).
  • Blower motor relay (14B192).
 Go To PINPOINT TEST M .
The blower motor is inoperative - EATC
  • Open fuse.
  • Circuit open/short.
  • Blower motor.
  • Blower motor speed control (19E624).
  • Blower motor relay.
  • Remote climate control module.
 Go To PINPOINT TEST N .
The blower motor does not operate correctly - manual climate control
  • Circuit open/short.
  • Blower motor.
  • Blower motor switch (18578).
  • Blower motor resistor (19A706).
 Go To PINPOINT TEST O .
The blower motor operates continuously in high speed - manual climate control
  • Circuit short.
  • Blower motor resistor.
  • Blower motor switch.
 Go To PINPOINT TEST P .
The blower motor operates continuously in high speed - EATC
  • Circuit open/short.
  • Blower motor speed control.
  • Remote climate control module.
 Go To PINPOINT TEST Q .
No operation in high blower setting - manual climate control
  • Circuit open.
  • Blower motor switch.
 Go To PINPOINT TEST R .
No operation in lower speeds - manual climate control
  • Circuit open.
  • Blower motor resistor.
 Go To PINPOINT TEST S .
No operation in some blower settings - EATC
  • Blower motor speed control.
  • Remote climate control module.
 Go To PINPOINT TEST T .
The temperature set point does not repeat after turning the ignition switch off - EATC
  • Open fuse.
  • Circuit open.
  • Remote climate control module.
 REPAIR circuit 385 (WH/RD) or circuit 729 (RD/WH) for an open. If okay, INSTALL a new remote climate control module.
The temperature display will not switch between Celsius and Fahrenheit - EATC
  • Integrated control panel (ICP) (18C864).
  • Instrument cluster.
 VERIFY correct defrost and A/C operation. If operation is correct, INSTALL a instrument cluster module. If operation is not correct, INSTALL a new ICP.
Insufficient air conditioning (A/C) cooling
  • Low refrigerant level.
  • Temperature blend door actuator.
 CARRY OUT the refrigerant system tests. REFER to REFRIGERANT SYSTEM TESTS .
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