System Inspection

Engine Control-Traction Control Interface Inspection
1. Remove the powertrain control module (PCM).

SST-Monitor, Engine Signal:

2. Connect the special service tools (SST)s to the PCM.
3. Warm up the engine to normal operating temperature and let it idle.

Example: Torque Reduction Request Signal:

4. With no electrical load operating, check the torque reduction inhibit signal at the PCM terminal 15 by using an oscilloscope.
5. If the torque reduction inhibit signal can not be detected, do as follows.

SST-NGS:

(1) Connect the Special Service Tool-New Generation Star Tester (SST-NGS).
(2) Verify that diagnostic trouble code No.P0100, 0110, 0115, 0120, 0130, 0134, 0140, 0150, 0154, 0160, 0335 are not displayed. If any code is displayed, carry out troubleshooting.
6. Lift up the vehicle.
7. Shift the selector lever to D.
8. Depress the accelerator pedal, and verify that the engine speed does not exceed 1,500 rpm.
9. If the engine speed smoothly increases over 1,500 rpm check the torque reduction request signal at the PCM terminal 1Q by using an oscilloscope.
10. Depress the accelerator pedal, and verify that the signal changes as shown in the figure.
11. If there is no change, check the anti-lock brake/traction control system (ABS/TCS) control unit.
12. Let the engine idle.

Example: Torque Reduction Inhibit Signal:

13. Check the torque reduction inhibit signal of the PCM terminal 15 by using an oscilloscope.
14. Disconnect the engine coolant temperature sensor connector, and verify that the signal voltage is 0N.
15. If not as specified, check PCM terminal 3Q (Engine coolant temperature sensor) for correct voltage.