Toyota Tundra Service Manual: Inspection

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Emission Control / Air Pump / Inspection

INSPECTION

PROCEDURE

1. INSPECT AIR PUMP ASSEMBLY

(a) Check the heater resistance.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (APH+) - 3 (APHG)	-20°C (-4°F)	4.4 to 20.0 Ω
	-10°C (14°F)	3.9 to 18.0 Ω
	0°C (32°F)	3.5 to 16.0 Ω
	10°C (50°F)	3.2 to 15.0 Ω
	20°C (68°F)	3.0 to 14.0 Ω

Text in Illustration

*a	Component without harness connected (Air Pump Assembly)

If the result is not as specified, replace the air pump assembly.

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Toyota Tundra Service Manual > Sfi System: Fuel Pump Control Circuit
DESCRIPTION The fuel pump circuit consists of the ECM, fuel pump and fuel pump ECU (which operates the fuel pump). Based on the engine output, the ECM determines the fuel pump speed. The speed is then converted to a duty signal and sent to the fuel pump ECU. Based on the signal sent from the ECM, th ...

Toyota Tundra Service Manual: Inspection

Components

Installation

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