Pinpoint Test

1. Ignition OFF.
2. Disconnect: In-Vehicle Temperature Sensor.
3. Carry out the in-vehicle temperature sensor component test. REFER to In-Vehicle Temperature Sensor .

Does the in-vehicle temperature sensor test OK? 

• Yes: GO to 2  .
• No: INSTALL a new in-vehicle temperature sensor. REFER to In-Vehicle Temperature Sensor .

1. Ignition ON.
2. Measure:

   In-Vehicle Temperature Sensor			In-Vehicle Temperature Sensor
   C233			C233
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	VH414 (GN/BU)		3	RH111 (GY/BU)

Is the voltage between 4.7 and 5.1 volts? 

• Yes: INSTALL a new in-vehicle temperature sensor. REFER to In-Vehicle Temperature Sensor . TEST the system for normal operation. If the DTC returns, GO to  8.
• No: For DTC B1A61:11, GO to  6.

  For DTC B1A61:15, GO to 3  .

1. Ignition OFF.
2. Disconnect: HVAC Module C228A.
3. Disconnect: HVAC Module C228B.
4. Measure:

   HVAC Module			In-Vehicle Temperature Sensor
   C228B			C233
   Pin	Circuit	Measurement / Action	Pin	Circuit
   29	VH414 (GN/BU)		1	VH414 (GN/BU)

Is the resistance less than 3 ohms? 

• Yes: GO to 4  .
• No: REPAIR the circuit.

1. Measure:

   HVAC Module			In-Vehicle Temperature Sensor
   C228A			C233
   Pin	Circuit	Measurement / Action	Pin	Circuit
   23	RH111 (GY/BU)		3	RH111 (GY/BU)

Is the resistance less than 3 ohms? 

• Yes: GO to 5  .
• No: REPAIR the circuit.

1. Measure:

   In-Vehicle Temperature Sensor			Ground
   C233			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	VH414 (GN/BU)		-	Ground

Is any voltage present? 

• Yes: REPAIR the circuit.
• No: GO to  8.

1. Ignition OFF.
2. Disconnect: HVAC Module C228A.
3. Disconnect: HVAC Module C228B.
4. Measure:

   In-Vehicle Temperature Sensor			In-Vehicle Temperature Sensor
   C233			C233
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	VH414 (GN/BU)		3	RH111 (GY/BU)

Is the resistance greater than 10, 000 ohms? 

• Yes: GO to 7  .
• No: REPAIR the circuits.

1. Measure:

   HVAC Module			Ground
   C228B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   29	VH414 (GN/BU)		-	Ground

Is the resistance greater than 10, 000 ohms? 

• Yes: GO to 8  .
• No: REPAIR the circuit.

1. Ignition OFF.
2. Disconnect and inspect all HVAC module connectors.
3. Repair:
   • corrosion (install new connector or terminals - clean module pins)
   • damaged or bent pins - install new terminals/pins
   • pushed-out pins - install new pins as necessary
4. Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.

Is the concern still present? 

• Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new HVAC module. REFER to Heating Ventilation Air Conditioning (HVAC) Module .
• No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.