Fuel System Monitor

Fuel Trim Monitor (P0170)

Test conditions and main points to note:

1. Conduct test drives in a manner that will ensure all the following conditions are met:
(1) Engine coolant temperature: 80-97°C (176-207°F) or higher (with the engine fully warmed up).
(2) Outside air temperature: -10°C (14°F) or higher.
(3) Selector lever position: D range.
2. The following drive pattern (from start up to when the ignition is turned off) completes one trip monitor (time required is approximately 35 minutes.)




Drive cycle pattern

<>1: After the engine is completely warmed up, turn off the ignition.
<>2: Start the engine and accelerate quickly until speed reaches 89 - 97 km/h (55 - 60mph).
* 3: Monitoring period: Drive for 30 seconds or more while maintaining speed between 59-97 km/h (55 - 60 mph). Then drive steadily and continuously for 120 seconds or more. (Accelerate and decelerate slightly during the 120 second period. Braking is permissible, but avoid sudden acceleration or deceleration.)
<>4: Decelerate and stop the vehicle. After stopping the vehicle, turn off the ignition.