About System Monitors

All kinds of diagnostic trouble code can be monitored by carrying out a short drive in accordance with the following drive cycle pattern. In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the check engine/malfunction indicator lamp and to check if the repair procedure has eliminated the trouble (the check engine/malfunction indicator lamp is no longer illuminated).

NOTES:

1. For checking the following three systems for illumination of the check engine/malfunction indicator lamp, perform the driving up to the point B twice successively. Before beginning with the first driving, turn off the ignition switch for more than 10 seconds.
- EGR system
- Fuel trim
- Evaporative emission control system

2. In case of the systems other than those three mentioned above, performing a drive up to the point A twice successively will suffice for determining if the check engine/malfunction indicator lamp illuminates or not. Before beginning with the first driving, turn off the ignition switch for more than 10 seconds.

3. Perform test drives under the following conditions:
a. On vehicles with automatic transmission, set selector lever in D range, overdrive switch ON, Power/Economy changeover switch in P range.
b. Acceleration: Keep the throttle in 1/4-3/4 opened conditions.
c. Deceleration: Lower the vehicle speed below 15 mph or the engine speed below 1,000 r/min (without operating brake and clutch).
d. During cruising: Keep the throttle opening constant.
e. During stopping: Keep the throttle fully closed, A/C OFF and transmission in neutral.
f. Coolant temperature at starting: 1000 (50°F) or more
g. Intake air temperature at starting: 40°C (104°F) or more
h. Intake air temperature during driving: 50°C (122°F) or more