INSPECTION AND VERIFICATION
- Verify the customer concern.
- Visually inspect for obvious signs of damage and system integrity. VISUAL INSPECTION Mechanical Electrical Refrigerant Heater control flaps Ducting Fuse(s) Harness Electrical connectors Switch(s)
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.
DTC INDEX
| CAUTION | When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00 |
Note. If the control module is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation, prior to the installation of a new module.
Note. Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra information read by the manufacturer-approved diagnostic system).
Note. When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places and with a current calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
Note. Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
Note. If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.
| DTC | Description | Possible Cause | Action |
|---|---|---|---|
| B105A01 | Aspirator fan fault | Aspirator fan circuit - short to ground, open circuit Aspirator fan component fault | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A5911 | Recirculation servo motor actuator - sensor 5 volt supply | Sensor 5 volt supply - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A5913 | Air conditioning pressure sensor - sensor 5 volt supply | Air conditioning pressure sensor 5 volt supply - open circuit | Refer to electrical circuit diagrams and test air conditioning pressure sensor circuit for open circuit |
| B1A6111 | In car temperature sensor circuit - short to ground | In car temperature sensor circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6115 | In car temperature sensor circuit - short to power, open circuit | In car temperature sensor circuit - short to power, open circuit | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6211 | Air conditioning pressure sensor - short to ground | Air conditioning pressure sensor circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6215 | Air conditioning pressure sensor - short to power, open circuit | Air conditioning pressure sensor circuit - short to power, open circuit | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6311 | Right hand sun load sensor - short to ground | Right hand sun load sensor circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6411 | Left hand sun load sensor - short to ground | Left hand sun load sensor circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A6713 | Vehicle sensor ground - open circuit | Vehicle sensor ground - open circuit | Refer to electrical circuit diagrams and test vehicle sensor ground circuit for open circuit |
| B1A6901 | Humidity sensor fault | Humidity sensor circuit - short to power, ground, open circuit Sensor component fault | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A7001 | Compressor fault | Over current detection | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1A9815 | Stepper motor actuator LIN Bus fault, or power supply - open circuit | No response from ALL steppers for 20 seconds - LIN network fault | Refer to electrical circuit diagrams and test stepper motor actuator LIN Bus for open circuit |
| B1B6013 | Recirculation servo motor actuator - sensor 5 volt supply | Sensor 5 volt supply - open circuit | Refer to electrical circuit diagrams and test sensor 5 volt supply for open circuit |
| B1B6111 | Pollution sensor HC input - short to ground | Pollution sensor HC input - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B6211 | Pollution sensor Nox input - short to ground | Pollution sensor Nox input - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B6313 | Recirculation servo motor actuator - ground circuit | Recirculation servo motor actuator ground - open circuit | Refer to electrical circuit diagrams and test recirculation servo motor actuator ground for open circuit |
| B1B6711 | Recirculation servo potentiometer - short to ground | Recirculation servo potentiometer circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B6715 | Recirculation servo potentiometer - short to power, open circuit | Recirculation servo potentiometer circuit - short to power, open circuit | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B6801 | Recirculation servo motor fault | Recirculation servo potentiometer circuit - short to power, ground, open circuit Recirculation door/linkage broken | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7111 | Evaporator temperature sensor - short to ground | Evaporator temperature sensor circuit - short to ground | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7115 | Evaporator temperature sensor - short to power, open circuit | Evaporator temperature sensor circuit - short to power, open circuit | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7211 | Stepper motor actuator LIN Bus power supply - short to ground | Stepper motor actuator LIN Bus power supply - short to ground | Refer to electrical circuit diagrams and test stepper motor actuator LIN Bus power supply for short to ground |
| B1B7400 | Defrost stepper motor actuator fault | Internal or external fault - under/over voltage | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7449 | Defrost stepper motor actuator fault | Internal electronic fault - motor over temperature | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7500 | Panel/foot stepper motor actuator fault | Internal or external fault - under/over voltage | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7549 | Panel/foot stepper motor actuator fault | Internal electronic fault - motor over temperature | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7600 | Front left air blend stepper motor actuator fault | Internal or external fault - under/over voltage | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7649 | Front left air blend stepper motor actuator fault | Internal electronic fault - motor over temperature | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7700 | Front right air blend stepper motor actuator fault | Internal or external fault - under/over voltage | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7749 | Front right air blend stepper motor actuator fault | Internal electronic fault - motor over temperature | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| B1B7884 | Air conditioning system under pressure | Signal below allowable range System leak Incorrect refrigerant charge weight | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system. Check system for leaks. Charge system with correct weight of refrigerant |
| B1B7885 | Air conditioning system over pressure | Signal above allowable range | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| U001088 | Medium speed CAN communication | Bus off | Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system |
| U030000 | Internal control module software incompatibility | Invalid configuration message is received | Re-configure the RJB using the manufacturer approved diagnostic system. Clear the DTC and retest. If the DTC is still logged suspect the climate control module, refer to the new module installation note at the top of the DTC Index |
| U1A1449 | Failed to initialize CAN | Internal electronic failure | Install a new climate control module, refer to the new module installation note at the top of the DTC Index |
| U300055 | Stored vehicle configuration data does not match | Incorrect car configuration data received | Re-configure the RJB using the manufacturer approved diagnostic system. Clear DTC and re-test. If the DTC remains suspect the climate control module, refer to the new module installation note at the top of the DTC Index |
| U300087 | Control Module | Missing message | Re-configure the RJB using the manufacturer approved diagnostic system. Check climate control module for DTCs and refer to the DTC Index. Check CAN network integrity using the manufacturer approved diagnostic system |
| U300281 | Vehicle Identification Number (VIN) | Vehicle/component mis-match. Corrupt VIN data being transmitted, module previously installed to other vehicle | Install original module, check for DTCs and refer to relevant DTC Index |