Electronic Throttle Actuator: Testing and Inspection

THROTTLE BODY INSPECTION [MZI-3.7]

NOTE: Perform the following inspection only when directed.

Resistance Inspection
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the throttle body connector.
4. Measure the resistance between throttle body terminals A and B.
- If not as specified, replace the throttle body.
- If as specified, carry out the "Circuit Open/Short Inspection".

Throttle actuator resistance
1-900 ohms






Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for open or short (continuity check).









Open circuit
- If there is no continuity, the circuit is open. Repair or replace the wiring harness.
- Throttle body terminal A and PCM terminal 2BO
- Throttle body terminal B and PCM terminal 2BR

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
- Throttle body terminal A and power supply
- Throttle body terminal A and ground
- Throttle body terminal B and power supply
- Throttle body terminal B and ground