Toyota 1 MZ–FE Manual page 410

EG2–410
DIAGNOSTIC TROUBLE CODE CHART (Cont'd)
DTC No. Detection Item
Exhaust Gas
Recirculation
P0402
Flow Excessive
Detected
Catalyst System
Efficiency Below
P0420
Threshold
Vehicle Speed Sensor
P0500
Malfunction
Idle Control System
P0505
Malfunction
Closed Throttle
Position Switch
P0510
Malfunction
1MZ–FE ENGINE – DIAGNOSTIC TROUBLE CODE CHART
Diagnostic Trouble Code Detecting Condition
EG R gas temp. sensor value is high during EGR cut–off when engine is
cold (Race engine at about 4,000 rpm without load so that vacuum is
applied to port E).
(2 trip detection logic)
EG R valve is always open.
(2 trip detection logic)
After the engine is warmed up and the vehicle driven for 5 min. at
32 – 80 km/h (20 – 50 mph), the waveforms of the heated oxygen
sensors, bank 1, 2 sensor 1 and bank 1 sensor 2 have the same amplitude.
No vehicle speed sensor signal to ECM under conditions a) and b).
a) Park/neutral position switch is OFF.
b) Vehicle is being driven.
Idle speed continues to vary greatly from the target speed.
(2 trip detection logic)
The closed throttle position switch does not turn ON even once when the
vehicle is driven.
(2 trip detection logic)