AIR CONDITIONING SYSTEM, Diagnostic DTC:B1471/71
| DTC Code | DTC Name |
|---|---|
| B1471/71 | A/C Inverter High Voltage Power Resource System Malfunction |
DESCRIPTION
The hybrid vehicle control ECU monitors the voltage of the HV battery. The hybrid vehicle control ECU stops compressor control and stores this DTC when the monitored voltage is outside the specified range.
This DTC will be stored as a history DTC. Compressor control may not resume unless the power switch is turned off.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
Note |
|---|---|---|---|---|---|
B1471/71 |
A/C Inverter High Voltage Power Resource System Malfunction |
|
|
Memorized |
- |
WIRING DIAGRAM
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.
Inspect the fuses for circuits related to this system before performing the following procedure.
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 Techstream, 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
CHECK FOR DTC (HYBRID CONTROL SYSTEM)
Check if hybrid control system DTCs are output.
Click hereClick hereClick here
Powertrain > Hybrid Control > Trouble Codes
OK
Hybrid control system DTCs are not output.
Result
Proceed to
OK
NG
INSPECT HIGH VOLTAGE FUSE
CAUTION:Be sure to wear insulated gloves.
Turn the power switch off.
Remove the service plug grip.
CAUTION:Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
Note:After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) with the service plug grip removed.
Remove the connector cover assembly.
Note:Be sure to prevent foreign matter or water from entering the inverter with converter assembly.
-
*1
High Voltage Fuse
Check that bolts A and B are tightened securely.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Item
(Tester Connection)
Condition
Specified Condition
High voltage fuse
(A - B)
Always
Below 1 Ω
Result
Proceed to
OK
NG
INSPECT ENGINE WIRE
CAUTION:Be sure to wear insulated gloves.
Disconnect the B112 and B111 engine wire connectors.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
B111-1 (PE) - B112-1 (ACPE)
Always
Below 1 Ω
B111-2 (PB) - B112-2 (ACPB)
Always
Below 1 Ω
B111-1 (PE) or B112-1 (ACPE) - Body ground
Always
10 kΩ or higher
B111-2 (PB) or B112-2 (ACPB) - Body ground
Always
10 kΩ or higher
Result
Proceed to
OK
NG