| Last Modified: 11-29-2007 | 1.6 G | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000031VM007X |
| Title: 3UR-FE ENGINE CONTROL: MASS AIR FLOW METER: INSPECTION (2008 Sequoia) | ||
INSPECTION
1. INSPECT MASS AIR FLOW METER
(a) Check the output voltage.
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(1) Apply battery voltage across terminals 1 (+B) and 2 (E2G). NOTICE:
While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. |
(2) Using a voltmeter, connect the positive (+) tester probe to terminal 3 (VG), and negative (-) tester probe to terminal 2 (E2G).
(3) Blow air into the MAF meter, and check that the voltage fluctuates.
If the result is not as specified, replace the MAF meter.
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(b) Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration. OK: There is no foreign material. If the result is not as specified, replace the mass air flow meter. |
(c) Check the IAT sensor.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4 (THA) - 2 (E2G) |
-20°C (-4°F) |
12.5 k to 16.9 kΩ |
|
4 (THA) - 2 (E2G) |
20°C (68°F) |
2.19 k to 2.67 kΩ |
|
4 (THA) - 2 (E2G) |
60°C (140°F) |
0.50 k to 0.68 kΩ |
If the result is not as specified, replace the MAF meter.
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