DTC B1500: Fuel Sender Open Detected [08/2019 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. According to the display on the Techstream, read the Data List.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Fuel Input	Fuel sender gauge (main) input signal/Min.: 0, Max.: 127.5	Fuel sender input value	Unit: L

   OK

   Fuel value displayed on the Techstream is almost same as needle indication.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )

Result: 

NG 

See step  2

1. Disconnect the H139 combination meter assembly connector.
2. Disconnect the Q1 fuel sender gauge assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H139-26 (L) - Q1-2	Always	Below 1 Ω
   H139-25 (E3) - Q1-3	Always	Below 1 Ω
   H139-24 (ES) - Body ground	Always	Below 1 Ω
   H139-26 (L) or Q1-2 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the fuel sender gauge assembly.

   (Refer to REMOVAL [08/2015 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 - 3	Float level is F (upper)	12 to 18 Ω
   	Float level is E (lower)	405 to 415 Ω

   RESULT:
   
   

   Result	Proceed to
   Result is as specified	A
   Result is not as specified	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [08/2017 - ] )

Result: 

B 

REPLACE FUEL SENDER GAUGE ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )