Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Toyota Highlander Base, AWDFACTORY OEM SERVICE PROCEDURE
Service Data
SERVICE DATA SPECIFICATION TABLE
| Camshaft timing oil control valve assembly | 1 - 2 | 6.9 to 7.9 Ω at 20°C (68°F) |
| Throttle body | 2 (M+) - 1 (M-) | 0.3 to 100 kΩ at 20°C (68°F) |
| Duty vacuum switching valve | 1 - 2 | 19 to 21 Ω at 20°C (68°F) |
| Acceleration pedal assembly | Accelerator Position No. 1 | Accelerator pedal is released: 0.5 to 1.1 V |
| Accelerator pedal is depressed: 2.5 to 4.5 V |
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| Accelerator Position No. 2 | Accelerator pedal is released: 1.2 to 2.0 V |
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| Accelerator pedal is depressed: 3.4 to 5.0 V |
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| Mass air flow meter | Standard Condition | Below 0.70 g/s |
| Crankshaft position sensor | 1 - 2 | 1630 to 2740 Ω at - 10 to 50°C (14 to 122°F) 2065 to 3225 Ω at 50 to 100°C (122 to 212°F) |
| Engine coolant temperature sensor | 1 - 2 | 2.32 to 2.59 kΩ at approx. 20°C (68°F) 0.310 to 0.326 kΩ at approx. 80°C (176°F) |
| Knock control sensor | 1 - 2 | 120 to 280 kΩ at 25°C (77°F) |
| Air fuel ratio sensor (for Bank 1) |
1 (HA1A) - 2 (+B) | 1.8 to 3.4 Ω at 20°C (68°F) |
| 1 (HA1A) - 4 (A1A-) | 10 kΩ or higher (always) | |
| Air fuel ratio sensor (for Bank 2) |
1 (HA2A) - 2 (+B) | 1.8 to 3.4 Ω at 20°C (68°F) |
| 1 (HA2A) - 4 (A2A-) | 10 kΩ or higher (always) | |
| Heated oxygen sensor (for Bank 1) |
2 (HT1B) - 1 (+B) | 11 to 16 Ω at 20°C (68°F) |
| 2 (HT1B) - 3 (E2) | 10 kΩ or higher (always) | |
| Heated oxygen sensor (for Bank 2) |
1 (HT2B) - 2 (+B) | 11 to 16 Ω at 20°C (68°F) |
| 1 (HT2B) - 4 (E2) | 10 kΩ or higher (always) | |
| Integration relay (EFI relay) |
(2E-12) - (2E-7) | 10 kΩ or higher (No battery voltage applied) |
| (2E-12) - (2E-7) | Below 1 Ω (Battery voltage applied to terminals 2E-10 and 2E-9) |
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| Integration relay (C/OPN relay) |
(2E-13) - (2E-7) | 10 kΩ or higher (No battery voltage applied) |
| (2E-13) - (2E-7) | Below 1 Ω (Battery voltage applied to terminals 2E-8 and 2D-12) |
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| Integration relay (A/F relay) |
(2A-4) - (2C-1) | 10 kΩ or higher (No battery voltage applied) |
| (2A-4) - (2C-1) | Below 1 Ω (Battery voltage applied to terminals 2E-10 and 2E-7) |
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| Ignition relay No. 1 | 3 - 5 | 10 kΩ or higher (No battery voltage applied) |
| 3 - 5 | Below 1 Ω (Battery voltage applied to terminals 1 and 2) |
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| Ignition relay No. 2 | 3 - 5 | 10 kΩ or higher (No battery voltage applied) |
| 3 - 5 | Below 1 Ω (Battery voltage applied to terminals 1 and 2) |
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| Fuel pump relay | 3 - 4 | Below 1 Ω (No battery voltage applied) |
| 3 - 4 | 10 kΩ or higher (Battery voltage applied to terminals 1 and 2) |
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| 3 - 5 | 10 kΩ or higher (No battery voltage applied) |
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| 3 - 5 | Below 1 Ω (Battery voltage applied to terminals 1 and 2) |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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