Toyota Tundra (2015 year). Manual — part 1281
The pressure in the secondary air passage can be checked using the Techstream.
Start the engine and warm it up.
a.
Turn the ignition switch off.
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 / Utility / Secondary Air Injection
Check / Manual Mode / AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN and AIR
PUMP 1: OFF, ASV1 CLOSE, AIR PUMP 2: OFF, ASV2 CLOSE.
HINT:
When Manual Mode is selected, the Techstream initialization (atmospheric pressure
measurement) is performed automatically. The initialization takes 10 seconds. After the
initialization, AIR PUMP and ASV operation can be selected.
f.
Start the engine.
g.
Perform the AIR system forced operation while the engine is idling.
h.
Check that the air pump (AIR PUMP), ASV and pressure in the AIR system passage (PRESSURE)
displayed on the Techstream indicate the conditions shown in the table below.
Standard:
TESTER OPERATION
AIR PUMP
ASV
PRESSURE*1
PULSATION*2
AIR PUMP: ON, ASV: OPEN
ON
OPEN
1.9 kPa or more
18 kPa or more
AIR PUMP: OFF, ASV: CLOSE
OFF
CLOSE
Less than 3.0 kPa
Less than 25 kPa
*1: Average pumping pressure (gauge pressure). The pressure should be 1.9 kPa or more
when the AIR system operates.
*2: The cumulative exhaust pulsation calculated by the ECM. If the calculated value
exceeds a certain level, the ECM determines that the exhaust pulsation is in the AIR
system.
i.
Turn the ignition switch off.
NOTICE:
This Secondary Air Injection Check only allows technicians to operate the AIR system for
display indicates the prohibition (WAIT or ERROR).
If ERROR is displayed on the Techstream during the test, stop the engine for 10
minutes, and then try again.
Performing the Secondary Air Injection Check repeatedly may cause damage to the AIR
been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine
running.
Turn the ignition switch off when the Secondary Air Injection Check operation finishes.
j.
PROCEDURE
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
A
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO SECONDARY AIR INJECTION
SYSTEM DTCS)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED TO
P2440, P2441, P2442 and/or P2443 is output
A
P2440, P2441, P2442 and/or P2443 and P0412 and/or P0415 are output
B
P2440, P2441, P2442 and/or P2443 and other DTCs (except P0412 and P0415) are output
C
If any DTCs other than P0412, P0415, P2440, P2441, P2442 and/or P2443 are output, troubleshoot those DTCs
first.
B
GO TO AIR SWITCHING VALVE ASSEMBLY
INSPECTION PROCEDURE (P0412 AND P0415)
C
GO TO DTC CHART
2.
PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE AIR PUMP HEATER)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
OK
OK
(a) Disconnect the air pump assembly (for bank 1 or Bank 2)
connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT/ Active Test / Activate the Air Pump Heater.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D89-1 (APH+) - Body ground
Activate the Air Pump Heater is ON
11 to 14 V
D90-1 (APH+) - Body ground
Activate the Air Pump Heater is ON
11 to 14 V
(f) Reconnect the air pump assembly (for bank 1 or Bank 2) connector.
NG
GO TO STEP 4
3.
INSPECT AIR PUMP ASSEMBLY (FOR BANK 1 OR BANK 2) (HEATER RESISTANCE)
(a) Inspect the air pump assembly (for bank 1 or bank 2)
.
NG
REPLACE AIR PUMP ASSEMBLY (FOR BANK 1 OR
BANK 2)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
OK
OK
4.
INSPECT AIR PUMP HEATER (AI-HTR) RELAY
NG
REPLACE AIR PUMP HEATER (AI-HTR) RELAY
5.
CHECK AIR PUMP HEATER (AI-HTR) RELAY (POWER SOURCE)
(a) Remove the air pump heater (AI-HTR) relay.
(b) Measure the voltage according to the value(s) in the table
below.
Standard Voltage
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
AI-HTR relay terminal 5 - Body
ground
Always
11 to 14 V
(c) Reinstall the air pump heater (AI-HTR) relay.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK HARNESS AND CONNECTOR (AIR PUMP ASSEMBLY - AI-HTR RELAY, BODY
GROUND)
(a) Remove the air pump heater (AI-HTR) relay.
(b) Disconnect the air pump assembly (for bank 1 or bank 2) connector.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
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