AIR CONDITIONING SYSTEM, Diagnostic DTC:B1475/75
| DTC Code | DTC Name |
|---|---|
| B1475/75 | A/C Inverter Cooling / Heating System Malfunction |
DESCRIPTION
The temperature sensor of the compressor with motor assembly detects the A/C inverter temperature.
If the temperature exceeds the maximum, operation of the compressor with motor assembly will be stopped, and this DTC will be stored.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
Note |
|---|---|---|---|---|---|
B1475/75 |
A/C Inverter Cooling / Heating System Malfunction |
Temperature of the A/C inverter is outside the specified range (temperature is too high), or there is an open or short to ground in the temperature sensor circuit |
|
Memorized |
- |
CAUTION / NOTICE / HINT
Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Carry the removed service plug in your pocket to prevent other technicians from accidentally reconnecting it while you are servicing the vehicle.
Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs from these systems are output simultaneously.
PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
Using the GTS, check if the CAN communication system is functioning normally.
for LHD:Click here
for RHD:Click here
Result
Result
Proceed to
CAN communication system DTCs are not output
A
CAN communication system DTCs are output
B
PERFORM ACTIVE TEST USING GTS (CONTROL THE ELECTRIC COOLING FAN)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test.
Check the operation by referring to the table below.
Powertrain > Engine and ECT > Active Test
Tester Display
Measurement Item
Control Range
Diagnostic Note
Control the Electric Cooling Fan
Control electric cooling fan motor
ON/OFF
Perform this test when the following conditions are met:
Power switch on (IG)
Engine stopped
Shift lever in P
Powertrain > Engine and ECT > Active Test
Tester Display
Control the Electric Cooling Fan
OK
Electric cooling fan operates smoothly.
Result
Proceed to
OK
NG
CHECK REFRIGERANT PRESSURE
Install a manifold gauge set.
for HFC-134a (R134a):Click here
for HFO-1234yf (R1234yf):Click here
Turn the power switch on (READY).
-
*a
LO
*b
HI
Read the manifold gauge pressure when the following conditions are met.
Prepare the vehicle according to the table below.
Item
Condition
Vehicle doors
Fully open
Temperature setting
MAX COLD
Blower speed
HI
A/C switch
On
Recirculation/fresh switch
RECIRCULATION
Interior temperature
25 to 35°C (77 to 95°F)
Standard Pressure
Low pressure side
150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)
High pressure side
1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)
Result
Proceed to
OK
NG
CHECK FOR DTC
Clear the DTCs.
Body Electrical > Air Conditioner > Clear DTCs
Turn the power switch on (READY).
Prepare the vehicle according to the table below.
Item
Condition
Blower speed
HI
A/C switch
On
Temperature setting
MAX. COLD
Check for DTCs.
Body Electrical > Air Conditioner > Trouble Codes
OK
DTC B1475/75 is not output.
Result
Proceed to
OK
NG
Note:If the engine keeps idling when ambient temperature is high, the compressor with motor assembly may automatically stop to protect the inverter circuit, and DTC B1475/75 may be stored.