DTC B1498/98: Communication Malfunction (A/C Inverter Local) [11/2016 - ]: Procedure

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

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]

   Result

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

Result:  2

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

Result:  1

A 

See step  2

1. Check if hybrid control system DTCs are output.

   Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2016 - 10/2017] Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2017 - ]

   Powertrain > Hybrid Control > Trouble Codes 

   Result

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

Result:  2

B 

GO TO HYBRID CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2014 - ] 

Result:  1

A 

See step  3

1. Disconnect the C13 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
   C13-5 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

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
   C13-6 (IG1) - C13-5 (GND)	Power switch on (IG)	11 to 14 V
   C13-6 (IG1) - C13-5 (GND)	Power switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  5

1. Disconnect the A86 hybrid vehicle control ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C13-1 (CLK) - A86-10 (CLK)	Always	Below 1 Ω
   C13-2 (DIN) - A86-9 (ITE)	Always	Below 1 Ω
   C13-3 (DOUT) - A86-8 (ETI)	Always	Below 1 Ω
   C13-1 (CLK) or A86-10 (CLK) - Body ground	Always	10 kΩ or higher
   C13-2 (DIN) or A86-9 (ITE) - Body ground	Always	10 kΩ or higher
   C13-3 (DOUT) or A86-8 (ETI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  6

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the power switch off.
2. Remove the service plug grip.

   Refer to REMOVAL [02/2014 - ]

   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 [11/2016 - ]

   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.
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

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE ELECTRIC VEHICLE FUSE. Refer to  REMOVAL [11/2016 - ] 

Result:  1

OK 

See step  7

1. Disconnect the w2 and w1 No. 2 engine room wire connectors.

   Refer to REMOVAL [11/2016 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   w1-1 (PE) - w2-2 (ACPE)	Always	Below 1 Ω
   w1-2 (PB) - w2-1 (ACPB)	Always	Below 1 Ω
   w1-1 (PE) or w2-2 (ACPE) - Body ground	Always	10 kΩ or higher
   w1-2 (PB) or w2-1 (ACPB) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE NO. 2 ENGINE ROOM WIRE. Refer to  REMOVAL [11/2016 - ] 

Result:  1

OK 

See step  8

1. Replace the compressor with motor assembly.

   Refer to REMOVAL [11/2016 - ]

   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.

   Refer to DTC CHECK / CLEAR [02/2014 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

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

Result:  1

A 

END (COMPRESSOR WITH MOTOR ASSEMBLY WAS DEFECTIVE) 

Result:  2

B 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [11/2016 - ]