Toyota Tundra (2015 year). Manual — part 1124
A
HINT:
If there is an open circuit, the Techstream indicates -40°C (-40°F).
If there is a short circuit, the Techstream indicates 140°C (284°F) or higher.
B
GO TO STEP 4
C
CHECK FOR INTERMITTENT PROBLEMS
2.
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)
(a) Disconnect the MAF meter connector.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT /
Data List / Intake Air.
(g) Read the value displayed on the Techstream.
Standard value:
140°C (284°F) or higher
HINT:
Perform "Inspection After Repair" after replacing the mass air
flow meter
.
NG
GO TO STEP 3
OK
CONFIRM GOOD CONNECTION TO SENSOR. IF OK,
REPLACE MASS AIR FLOW METER
3.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113; I...
(a) Disconnect the MAF meter connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-4 (THA) - D74-73 (THA)
Always
Below 1 Ω
D7-5 (E2) - D74-98 (E2)
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CONFIRM GOOD CONNECTION TO ECM. IF OK,
REPLACE ECM
4.
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)
(a) Disconnect the MAF meter connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT /
Data List / Intake Air.
(f) Read the value displayed on the Techstream.
Standard value:
-40°C (-40°F)
HINT:
Perform "Inspection After Repair" after replacing the mass air
flow meter
.
NG
GO TO STEP 5
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113; I...
OK
REPLACE MASS AIR FLOW METER
5.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the MAF meter connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
D7-4 (THA) or D74-73 (THA) -
Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113; I...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000PF50XYX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0115,P0117,P0118; Engine Coolant Temperature
Circuit Malfunction; 2015 MY Tundra [08/2014 - ]
DTC
P0115
Engine Coolant Temperature Circuit Malfunction
DTC
P0117
Engine Coolant Temperature Circuit Low Input
DTC
P0118
Engine Coolant Temperature Circuit High Input
DESCRIPTION
A thermistor, whose resistance value varies according to the ECT, is built into the Engine Coolant Temperature
(ECT) sensor.
HINT:
When DTC P0115, P0117 or P0118 is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECT
is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.
DTC NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0115
Open or short in ECT sensor circuit for 0.5 seconds
(1 trip detection logic)
Open or short in ECT sensor circuit
ECT sensor
ECM
P0117
Short in ECT sensor circuit for 0.5 seconds
(1 trip detection logic)
Short in ECT sensor circuit
ECT sensor
ECM
P0118
Open in ECT sensor circuit for 0.5 seconds
(1 trip detection logic)
Open in ECT sensor circuit
ECT sensor
ECM
HINT:
TEMPERATURE DISPLAYED
MALFUNCTION
-40°C (-40°F)
Open circuit
140°C (284°F) or higher
Short circuit
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0115,P0117,...
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