Toyota Tundra (2015 year). Manual — part 2030
OK
OK
(a) Disconnect the air pump 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 connector.
NG
GO TO STEP 4
3.
INSPECT AIR PUMP ASSEMBLY (HEATER RESISTANCE)
(a) Inspect the air pump assembly
.
NG
REPLACE AIR PUMP ASSEMBLY
4.
INSPECT AIR PUMP HEATER RELAY
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
OK
OK
(a) Inspect the air pump heater relay
.
NG
REPLACE AIR PUMP HEATER RELAY
5.
CHECK AIR PUMP HEATER RELAY (POWER SOURCE)
(a) Remove the air pump heater relay (AI-HTR).
(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 relay (AI-HTR).
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK HARNESS AND CONNECTOR (AIR PUMP - AIR PUMP HEATER RELAY,
BODY GROUND)
(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 (Check for Open)
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
OK
OK
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
Standard Resistance (Check for Short)
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
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
(d) Reinstall the air pump heater relay (AI-HTR).
(e) Reconnect the air pump connector.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
7.
INSPECT AIR PUMP ASSEMBLY
(a) Inspect the air pump assembly
.
NG
REPLACE AIR PUMP ASSEMBLY
8.
PERFORM ACTIVE TEST USING TECHSTREAM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
(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 / 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 / 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.
(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.
Performing the Air Injection Check repeatedly may cause
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
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