DTC B1498/98: Communication Malfunction (A/C Inverter Local) [10/2014 - 10/2015]: Procedure

1. Using the Techstream, check if the CAN communication system is functioning normally.

   Result

   Result	Proceed to
   CAN DTCs are not output	A
   CAN DTCs are output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] )

Result: 

A 

See step  2

1. Check if DTCs for the hybrid control system are output using the Techstream.

   Result

   Result	Proceed to
   DTCs are not output	A
   Only DTC P3108 is output	A
   DTCs other than P3108 are output	B

Result: 

B 

GO TO HYBRID CONTROL SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ] )

Result: 

A 

See step  3

1. Disconnect the B58 compressor with motor assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B58-5 (GND) - Body ground	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   B58-6 (IG1) - B58-5 (GND)	Power switch on (IG)	11 to 14 V
   B58-6 (IG1) - B58-5 (GND)	Power switch off	Below 1 V

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the A53 power management control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B58-1 (CLK) - A53-19 (CLK)	Always	Below 1 Ω
   B58-2 (DIN) - A53-31 (ITE)	Always	Below 1 Ω
   B58-3 (DOUT) - A53-30 (ETI)	Always	Below 1 Ω
   B58-1 (CLK) - Body ground	Always	10 kΩ or higher
   B58-2 (DIN) - Body ground	Always	10 kΩ or higher
   B58-3 (DOUT) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Turn the power switch off.
2. Remove the service plug grip (Refer to REMOVAL [10/2014 - ] ).
   WARNING:

   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.

3. Remove the connector cover assembly (Refer to REMOVAL [10/2014 - ] ).
   NOTE:

   Be sure to prevent foreign matter or water from entering the inverter with converter assembly.

4. Check that bolts A and B are tightened securely.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Item (Tester Connection)	Condition	Specified Condition
   Electric vehicle fuse (A - B)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Electric Vehicle Fuse

Result: 

NG 

REPLACE ELECTRIC VEHICLE FUSE 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  7

1. Disconnect the Y1 No. 4 engine wire connector (Refer to REMOVAL [10/2014 - ] ).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Y1-1 (PE) - Y2-1 (ACPE)	Always	Below 1 Ω
   Y1-2 (PB) - Y2-2 (ACPB)	Always	Below 1 Ω
   Y1-1 (PE) - Body ground	Always	10 kΩ or higher
   Y1-2 (PB) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPLACE NO. 4 ENGINE WIRE 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  8

1. Replace the compressor with motor assembly (Refer to REMOVAL [10/2014 - ] ).

   HINT: 

   Since the compressor with motor assembly cannot be inspected while it is removed from the vehicle, replace the compressor with motor assembly with a new or known good one and check that the condition returns to normal.

2. Check for DTCs.

   Result

   Result	Proceed to
   DTC B1498/98 is not output	A
   DTC B1498/98 is output	B

Result: 

A 

END (COMPRESSOR WITH MOTOR ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [10/2014 - 10/2015] )