PINPOINT TEST V: DTCs B1A69:11 and B1A69:15

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

V1 CHECK FOR HVAC MODULE DTCS
- Enter the following diagnostic mode on the scan tool: Self-Test - HVAC Module.
- Carry out the self-test.
Are DTCs C1B14:11 or C1B14:12 present?
1. Yes : GO to PINPOINT TEST C .
2. No : GO to V2 .
V2 CHECK FOR VOLTAGE TO THE IN-VEHICLE TEMPERATURE SENSOR/HUMIDITY SENSOR
- Ignition OFF.
- Disconnect: In-Vehicle Temperature Sensor/Humidity Sensor C2247.
- Ignition ON.
- Measure the voltage between the in-vehicle temperature sensor/humidity sensor C2247-4 , circuit LH111 (BN/WH), harness side and ground.
  
  Fig 1: Measuring Voltage Between In-Vehicle Temperature Sensor/Humidity Sensor C2247-4, Circuit LH111 (BN/WH) And Ground
  Courtesy of FORD MOTOR CO.
Is the voltage between 4.7 and 5 volts?
1. Yes : For DTC B1A69:11 GO to V3 .
  For DTC B1A69:15 GO to V4.
2. No : REPAIR circuit LH111 (BN/WH) for an open.
V3 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: HVAC module C228B.
- Measure the resistance between the in-vehicle temperature sensor/humidity sensor C2247-3 , circuit VH413 (WH/BU), harness side and ground.
  
  Fig 2: Measuring Resistance Between In-Vehicle Temperature Sensor/Humidity Sensor C2247-3, Circuit VH413 (WH/BU) And Ground
  Courtesy of FORD MOTOR CO.
Is the resistance greater than 10, 000 ohms?
1. Yes : GO to V6.
2. No : REPAIR circuit VH413 (WH/BU) for a short to ground.
V4 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR AN OPEN CIRCUIT
- Ignition OFF.
- Disconnect: HVAC module C228B.
- Measure the resistance between the in-vehicle temperature sensor/humidity sensor C2247-3 , circuit VH413 (WH/BU), harness side; and HVAC module C228A-18 , circuit VH413 (WH/BU) harness side.
  
  Fig 3: Checking Humidity Signal Circuit For Open Circuit
  Courtesy of FORD MOTOR CO.
Is the resistance less than 5 ohms?
1. Yes : GO to V5 .
2. No : REPAIR circuit VH413 (WH/BU) for an open.
V5 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR A SHORT TO POWER
- Ignition ON.
- Measure the voltage between the in-vehicle temperature sensor/humidity sensor C2247-3 , circuit VH413 (WH/BU), harness side ground.
  
  Fig 4: Measuring Voltage Between In-Vehicle Temperature Sensor/Humidity Sensor C2247-3, Circuit VH413 (WH/BU) Ground
  Courtesy of FORD MOTOR CO.
Is any voltage present?
1. Yes : REPAIR circuit VH413 (WH/BU) for a short to power.
2. No : GO to V6 .
V6 ISOLATE THE IN-VEHICLE TEMPERATURE SENSOR/HUMIDITY SENSOR
- Ignition OFF.
- Connect: HVAC module C228B.
- INSTALL a new in-vehicle temperature sensor/humidity sensor. REFER to CLIMATE CONTROL .
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self-Test - HVAC Module.
Does DTC B1A69:11 or B1A69:15 return?
1. Yes : GO to V7 .
2. No : The cause of the concern was an inoperative in-vehicle temperature sensor/humidity sensor.
V7 CHECK THE HVAC MODULE CONNECTION
- Inspect the HVAC module component and harness side connectors for:
  - corrosion
  - damaged pins
  - pushed-out terminals
- Connect and correctly seat all the HVAC module connectors.
- Clear the DTCs.
- Enter the following diagnostic mode on the scan tool: Self-Test - HVAC Module.
- Operate the system and verify the concern is still present.
Is the concern still present?
1. Yes : INSTALL a new HVAC module. REFER to CLIMATE CONTROL . TEST the system for normal operation.
2. No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.