Throttle Body: Service and Repair

REMOVAL
1. Disconnect battery ground cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

2. Disconnect crankcase ventilation tube and aspirator hose from air cleaner outlet tube. Loosen engine air cleaner tube clamps and remove air cleaner outlet tube.
3. Remove retaining bolts and accelerator cable shield from throttle body.
4. Disconnect accelerator cable and speed control actuator cable from throttle body lever.
5. Remove two accelerator cable bracket retaining bolts from throttle body. Position accelerator cable bracket, accelerator cable and speed control actuator cable out of the way.
6. Disconnect wiring connections for the engine control sensor wiring from the Idle Air Control (IAC) valve and Throttle Position (TP) sensor.

WARNING: Engine cooling system may be under pressure. Release pressure at radiator cap before removing hoses.

7. Remove water bypass hoses from the throttle body.
8. If required, remove the IAC valve and gasket from the surge tank connector. Discard gasket.
9. Remove the throttle body retaining nuts and bolts (note location for installation).
10. Remove throttle body from surge tank connector. Discard gasket.
11. Discard throttle body gasket.

INSTALLATION
1. Clean and inspect sealing surfaces of surge tank connector and throttle body.

CAUTION: Use care when cleaning gasket material because aluminum gouges easily which forms leak paths.

NOTE: If scraping is necessary, do not damage gasket surfaces or allow gasket material into intake manifold.

2. Install new throttle body gasket.
3. Position throttle body and install retaining bolts and nuts. Tighten to 16-23 Nm (12-16 lb ft).
4. If removed, install IAC valve with a new gasket to the surge tank connector. Tighten retaining bolts to 9.5 Nm (84 lb in).
5. Connect water bypass hoses and position clamps securely. Refill engine cooling system.
6. Connect wiring connectors for engine control sensor wiring to the TP sensor and IAC valve.
7. Install accelerator cable bracket to the throttle body. Tighten retaining bolts to 17 Nm (12 lb ft).
8. Connect accelerator cable and speed control actuator cable to the throttle body lever.
9. Install accelerator cable shield. Tighten retaining bolts to 1.4 Nm (12 lb in).
10. Connect air cleaner outlet tube to the throttle body and Engine Air Cleaner (ACL). Tighten engine air cleaner tube clamps to 1.4-2.5 Nm (13-22 lb in).
11. Connect crankcase ventilation tube and aspirator hose to the air cleaner outlet tube.
12. Connect battery ground cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

13. Start engine and check for vacuum and engine coolant leaks.