Toyota Tundra (2015 year). Manual — part 1536
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000T8X0EKX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel Pump Primary Circuit; 2015 MY Tundra
[08/2014 - ]
DTC
P0230
Fuel Pump Primary Circuit
DESCRIPTION
When a malfunction in the fuel pump circuit is detected, DTC P0230 is stored.
signal and sent to the fuel pump ECU. Based on the signal sent from the ECM, the fuel pump ECU adjusts the
fuel pump operation speed between 3 settings. The fuel pump ECU also has a self-diagnosis function. Based on
the fuel pump circuit condition, the fuel pump ECU outputs a diagnostic signal (DI) to the ECM, and the ECM
determines if there is a malfunction in the fuel pump circuit.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0230
When either condition below is met (1 trip detection
logic):
When fuel pump is operating:
Remaining fuel is 17 L or more
DI terminal output is low
When fuel pump is not operating:
DI terminal output is high
Open or short in fuel pump
circuit
Fuel pump
Fuel pump ECU
ECM
MONITOR DESCRIPTION
To monitor the fuel pump circuit, the ECM checks the fuel pump control signal (FPC) and diagnostic signal (DI).
The FPC voltage varies between approximately 0 V to approximately 12 V (duty signal). Based on the
if the fuel pump circuit is malfunctioning. When the ECM determines that the fuel pump circuit is
malfunctioning, a DTC is set immediately.
WIRING DIAGRAM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel...
INSPECTION PROCEDURE
This troubleshooting procedure is based on the premise that the engine is started. If the engine is not started,
proceed to the problem symptoms table
.
PROCEDURE
1.
CHECK FOR DTC (B1500)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Trouble Codes.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel...
A
OK
OK
(e) Read the DTC.
Result
RESULT
PROCEED TO
DTC B1500 is not output
A
DTC B1500 is output
B
B
GO TO DTC B1500
2.
PERFORM ACTIVE TEST USING TECHSTREAM (FUEL PUMP)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump
/ Speed.
(d) Check whether operating sounds can be heard while operating the relay using the Techstream.
OK:
Operating sounds can be heard from relay.
NG
GO TO STEP 8
3.
INSPECT FUEL PUMP
(a) Inspect the fuel pump
.
NG
REPLACE FUEL PUMP
4.
CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP ECU)
(a) Disconnect the R6 fuel pump connector.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel...
OK
OK
NEXT
(b) Disconnect the R8 fuel pump ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
R6-4 (B) - R8-1 (FP)
Always
Below 1 Ω
R6-5 (E) - R8-2 (FP-)
Always
Below 1 Ω
R6-4 (B) or R8-1 (FP) - Body ground
Always
10 kΩ or higher
R6-5 (E) or R8-2 (FP-) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
5.
CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - ECM, BODY GROUND)
(a) Disconnect the R7 fuel pump ECU connector.
(b) Disconnect the A24 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
R7-1 (FPC) - A24-52 (FPC)
Always
Below 1 Ω
R7-2 (DI) - A24-18 (DI)
Always
Below 1 Ω
R7-3 (E) - Body ground
Always
Below 1 Ω
R7-1 (FPC) or A24-52 (FPC) - Body ground
Always
10 kΩ or more
R7-2 (DI) or A24-18 (DI) - Body ground
Always
10 kΩ or more
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
REPLACE FUEL PUMP ECU
(a) Replace the fuel pump ECU
.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel...
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