Toyota Tundra (2015 year). Manual — part 1658
OK
OK
OK
(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
NG
GO TO STEP 5
4.
INSPECT AIR PUMP (HEATER RESISTANCE)
(a) Inspect the air pump (for bank 1 or bank 2)
.
NG
REPLACE AIR PUMP (FOR BANK 1 OR BANK 2)
5.
INSPECT AIR PUMP HEATER RELAY (AI-HTR)
(a) Inspect the air pump heater relay (AI-HTR)
.
NG
REPLACE AIR PUMP HEATER RELAY (AI HTR)
6.
CHECK AIR PUMP HEATER RELAY (AI-HTR) (POWER SOURCE)
(a) Remove the air pump heater relay (AI-HTR).
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
OK
OK
(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
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
7.
CHECK HARNESS AND CONNECTOR (AIR PUMP - AI-HTR RELAY, BODY)
(a) Remove the air pump heater relay (AI-HTR).
(b) Disconnect the air pump connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
AI-HTR relay terminal 3 - D89-1 (APH+)
Always
Below 1 Ω
AI-HTR relay terminal 3 - D90-1 (APH+)
Always
Below 1 Ω
D89-3 (APHG) - Body ground
Always
Below 1 Ω
D90-3 (APHG) - Body ground
Always
Below 1 Ω
AI-HTR relay terminal 3 or D89-1 (APH+) - Body ground
Always
10 kΩ or higher
AI-HTR relay terminal 3 or D90-1 (APH+) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
OK
8.
INSPECT AIR PUMP (FOR BANK 1 OR BANK 2)
(a) Inspect the air pump (for bank 1 or bank 2)
.
NG
REPLACE AIR PUMP (FOR BANK 1 OR BANK 2)
9.
PERFORM ACTIVE TEST USING TECHSTREAM
(a) Visual check
(1) Start the engine and warm it up.
(2) Turn the ignition switch off.
(3) Disconnect the No. 1 air hose.
(4) Connect the Techstream to the DLC3.
(5) Turn the ignition switch to ON and turn the
Techstream on.
(6) 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.
HINT:
When Manual Mode is selected, the Techstream initialization
(atmospheric pressure measurement) is performed
automatically. The initialization takes 10 seconds. After the
initialization, AP and ASV operation can be selected.
(7) Start the engine.
(8) Perform the AIR system intrusive operation while the
engine is idling.
(9) Place your hand near the air switching valve port and
check that the exhaust gas pressure pulsates when the
ASV is turned ON.
CAUTION:
(10) 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: ON, ASV1: CLOSE, AIR
PUMP 2: ON, ASV2: CLOSE.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
(11) Check that the exhaust gas does not pulsate when
the ASV is turned OFF.
(12) Turn the ignition switch off.
NOTICE:
prohibited, the Techstream display indicates the
prohibition (WAIT or ERROR).
If an ERROR is displayed on the Techstream during the
test, stop the engine for 10 minutes, and then try
again.
AIR PUMP
OPERATIONS
ASV
OPERATIONS
EXHAUST GAS
PULSATION
ON
OFF
Not detected
ON
ON
Detected
(b) Other inspection method:
The ASV operation can be confirmed by checking the cumulative
pressure pulsation* provided in the System Check.
Perform System Check operation under Manual Mode.
*: The exhaust pulsation value is calculated in the ECM. If the
calculated value exceeds a certain level, the ECM determines that
the exhaust pulsation is in the AIR system.
(1) Start the engine and warm it up.
(2) Turn the ignition switch off.
(3) Connect the Techstream to the DLC3.
(4) Turn the ignition switch to ON and turn the
Techstream on.
(5) 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.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
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