REMOVAL CAUTION / NOTICE / HINT HINT: If the thermostat was not installed, cooling efficiency would decrease. Even if the engine tends to overheat, do not remove the thermostat. PROCEDURE 1. REMOVE NO. 1 ENGINE UNDER COVER 2. DRAIN ENGINE COOLANT
3. REMOVE V-BANK COVER SUB-ASSEMBLY 4. REMOVE AIR CLEANER ASSEMBLY 5. REMOVE AIR TUBE SUB-ASSEMBLY LH
(b) Disconnect the water by-pass hose.
(d) Remove the bolt and disconnect the air tube LH from the water inlet housing.
(f) Remove the 2 bolts and disconnect the air hose from the air switching valve LH. (g) Remove the air tube LH. 6. DISCONNECT OUTLET RADIATOR HOSE
7. REMOVE WATER INLET SUB-ASSEMBLY WITH THERMOSTAT
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Toyota Tundra Service Manual > Sfi System: Secondary Air Injection System Pump Stuck On Bank1 (P2444-P2447)
DESCRIPTION Refer to P2440 (See page ). DTC No. DTC Detection Condition Trouble Area P2444 P2446 Secondary air pressure more than 3.0 kPa (23 mmHg) despite ECM commanding air pump to turn off (2 trip detection logic) Short in air pump circuit Open or short in pressure sensor circuit Pressure sensor ...