The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2 trip detection logic" is used to ensure accurate detection of malfunctions. "Check mode" is also available to technicians as an option. In check mode, "1 trip detection logic" is used when simulating malfunction symptoms to increase increasing the ability of the system to detect malfunctions, including intermittent malfunctions ().

Measure the voltage according to the value(s) in the table below.

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 1VD-FTV ENGINE CONTROL

Turn the engine switch on (IG).

This procedure uses the GTS to display the learned values (injector compensation code, pilot quantity initial learning value, pilot quantity deterioration learning value, pilot quantity current learning value, pilot quantity learning value, crank time compensation learning value, A/F sensor learning value and catalyst deterioration learning value) stored in the ECM.

Visually check that the air filter is not excessively contaminated with dirt or oil.

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the GTS when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

Check for DTCs () and freeze frame data ().

DPF components:

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 1VD-FTV ENGINE CONTROL