Toyota 2GR-FE Manual page 213

DTCs
P0031, P0032, P0051 and P0052
P0037, P0038, P0057 and P0058
P0100, P0102 and P0103
P0110, P0112 and P0113
P0115, P0117 and P0118
P0120, P0121, P0122, P0123,
P0220, P0222, P0223, P0604,
P0606, P0607, P0657, P2102,
P2103, P2111, P2112, P2118,
P2119 and P2135
P0327, P0328, P0332 and P0333 Knock Sensor
P0351 to P0356
P2120, P2121, P2122, P2123,
P2125, P2127, P2128 and P2138
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
FAIL-SAFE CHART
If any of the following DTCs are set, the ECM enters fail-safe
mode to allow the vehicle to be driven temporarily.
Components
Air-Fuel Ratio (A/F) Sensor
Heater
Heated Oxygen (HO2) Sensor
Heater
Mass Air Flow (MAF) Meter
Intake Air Temperature (IAT)
Sensor
Engine Coolant Temperature
(ECT) Sensor
Electronic Throttle Control
System (ETCS)
Igniter
Accelerator Pedal Position (APP)
Sensor
NOTE:
*
: The vehicle can be driven slowly when the accelerator
pedal is depressed slowly. If the accelerator pedal is
depressed quickly, the vehicle may speed up and slow down
erratically.
Fail-Safe Operations
ECM turns off A/F sensor heater
ECM turns off HO2 sensor heater
ECM calculates ignition timing
according to engine speed and
throttle valve position
ECM estimates IAT to be 20°C
(68°F)
ECM estimates ECT to be 80°C
(176°F)
ECM cuts off throttle actuator
current and throttle valve returned
to 6.5° throttle position by return
spring
ECM then adjusts engine output
by controlling fuel injection
(intermittent fuel-cut) and ignition
timing in accordance with
accelerator pedal opening angle,
to allow vehicle to continue at
*
minimal speed
ECM sets ignition timing to
maximum retard
ECM cuts fuel
APP sensor has 2 sensor circuits:
Main and Sub
If either of circuits malfunctions,
ECM controls engine using the
other circuit
If both of circuits malfunction,
ECM regards accelerator pedal
as being released. As a result,
throttle valve is closed and engine
idles
ES–57
Fail-Safe Deactivation
Conditions
Ignition switch off
Ignition switch off
Pass condition detected
Pass condition detected
Pass condition detected
Pass condition detected and then
ignition switch turned off
Ignition switch off
Pass condition detected
Pass condition detected and then
ignition switch turned off
ES