Check At The Engine Control Module (ECM) Terminal
- Connect a needle-nosed wire probe to a voltmeter probe.
- Insert the needle-nosed wire probe into each of the ECM connector terminals from the wire side, and measure the voltage while referring to the check chart.NOTE:
- Make the voltage measurement with the ECM connector connected.
- You may find it convenient to pull out the ECM to make it easier to reach the connector terminals.
- The checks can be carried out off the order given in the chart.
CAUTION: Short-circuiting the positive (+) probe between a connector terminal and ground could damage the vehicle wiring, the sensor, ECM or all of them. Be careful to prevent this! - If voltmeter shows any division from standard value, check the corresponding sensor, actuator and related electrical wiring, then repair or replace.
- After repair or replacement, recheck with the voltmeter to confirm that the repair has corrected the problem.
| TERMINAL NUMBER | TERMINAL CODE | CHECK ITEM | CHECK CONDITION | NORMAL CONDITION | |
|---|---|---|---|---|---|
| 94 | CNTS | Cruise control switches power supply | Ignition switch: "ON" position | All switches: Released. | 4.7 to 5.0 V |
| Cruise control ON/OFF switch: Pressed. | 0.9 to 1.7 V | ||||
| "CANCEL" switch: Pressed. | 1.9 to 2.7 V | ||||
| "SET-" switch: Pressed. | 2.9 to 3.6 V | ||||
| "RES+" switch: Pressed. | 3.8 to 4.5 V | ||||
| 121 | BRK | Stoplight switch (brake switch) | Ignition switch: "ON" position | Depress the brake pedal. | Battery positive voltage |
| Release the brake pedal. | 1 V or less | ||||
| 128 | CLT1 | Clutch interlock switch (for cruise control system) <M/T> | Ignition switch: "ON" position | Release the clutch pedal. | 10 V or more |
| Depress the clutch pedal. | 1 V or less | ||||