P153B
DTC P0536-P0538 or P153B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0536
- Air Conditioning (A/C) Evaporator Temperature Sensor 2 Performance
DTC P0537
- Air Conditioning (A/C) Evaporator Temperature Sensor 2 Circuit Low Voltage
DTC P0538
- Air Conditioning (A/C) Evaporator Temperature Sensor 2 Circuit High Voltage
DTC P153B
- Air Conditioning (A/C) Evaporator Temperature Sensor 2 Not Plausible
Diagnostic Fault Information
Circuit Description
The A/C refrigerant low side temperature sensor measures the temperature on the low pressure side of the A/C Compressor.
The Hybrid Powertrain control module 2 supplies the A/C evaporator temperature sensor with a low reference circuit and 5-volt signal circuit. The hybrid powertrain control module 2 determines the voltage drop across the sensor, which is proportional to temperature. As the temperature increases, the sensor resistance decreases and the voltage signal decreases. As the temperature decreases, the sensor resistance increases and the voltage signal increases.
Conditions for Running the DTC
* DTC P153B makes comparisons between other temperature sensors to determine if the A/C refrigerant low side temperature sensor reading is close to other temperature readings after a soak period. P153B is intended to run after a long ambient soak period, such as being parked overnight, when a hot engine condition has cooled, etc.
* DTCs P0537 and P0538 monitor A/C refrigerant low side temperature sensor for out of range conditions.
* DTC P0536 looks for the A/C refrigerant low side temperature sensor to go down in temperature when the compressor is operated with a cold engine and after the compressor has been off for one hour.
P0536
* 12 V battery system voltage above 10.25 V
* Hybrid Powertrain Control Module 2 is awake and communicating.
* None of these DTCs may be active: P0537; P0538, P0073; P0072; P0071, P0119; P0118; P0117; P0116, P0606.
* Engine coolant temperature must be within 15 degrees of outside air temperature.
* AC compressor must have been off for an hour since the last time the AC compressor was on.
* AC compressor must be turned on for one minute.
P0537 or P0538
* 12 V battery system voltage above 10.25 V
* Hybrid Powertrain Control Module 2 is awake and communicating.
P153B
* hybrid powertrain control module 2 is awake and communicating.
* None of these DTCs may be active: P0537;P0538, P0073; P0072; P0071, P0119; P0118; P0117; P0116, P0531, P0532; P0533, P0606
* Outside air temperature raw and corrected values must have had a chance to settle out. Once this occurs these variables are assigned a status of valid. May need to have some time driving in EV mode
* Engine coolant temperature must be within 15 degrees of outside air temperature (i.e., cool engine)
* Outside air temperature must be between 0°C(32°F) and 55°C(131°F).
* AC compressor must have been off for an hour since the last time the AC compressor was on.
Conditions for Setting the DTC
P0536
The difference between the A/C refrigerant low side temperature sensor before compressor on and after compressor on changes less than 2 degrees over a 30 second period.
P0537
The hybrid powertrain control module 2 detects the A/C refrigerant low side temperature sensor signal circuit is less than -38°C(-38°F) for more than 15 seconds.
P0538
The hybrid powertrain control module 2 detects the A/C refrigerant low side temperature sensor signal circuit is greater than 85°C(185°F) for more than 4 seconds.
P153B
* The difference between the A/C refrigerant low side temperature sensor and the outside air temperature value is greater than 10°C(50°F).
* The difference between the A/C refrigerant low side temperature sensor and the temperature calculated from the current high Side Refrigerant Pressure Sensor reading is greater than 10°C(50°F).
Action Taken When the DTC Sets
These are type B DTCs.
Conditions for Clearing the DTC
These are type B DTCs.
Reference Information
Schematic Reference
HVAC Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
* Automatic HVAC Description and Operation HVAC - Automatic
* Heating and Air Conditioning System Description and Operation Heating and Air Conditioning System
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Testing
1. Vehicle in Service Mode
2. Verify DTC P0536-P0538 or P153B is not set.
• If DTC P0536-P0538 or P153B is set
1. Program the K114B hybrid powertrain control module 2.
2. Verify the DTC does not set.
• If the DTC sets, replace the K114B hybrid powertrain control module 2.
• If the DTC does not set
3. All OK
• If DTC P0536-P0538 or P153B is not set
3. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* HVAC Component Replacement Reference HVAC Component Replacement Reference
* Control Module References Programming and Relearning for hybrid powertrain control module 2 control module replacement, programming and setup