Toyota T100 1996 Service Manual page 470

DI−206
DTC P0402
*: Only for 2WD models with a load capacity of 0.5 ton and regular cab.
CIRCUIT DESCRIPTION
Refer to DTC P0401 on page DI−196.
DTC No.
EGR gas temp. sensor value is high during EGR cut−off
when engine is cold (Race engine at about 4,000 rpm
P0402
without load so that vacuum is applied to port E)
(2 trip detection logic)
P0402 EGR valve is always open (2 trip detection logic)
WIRING DIAGRAM
Refer to DTC P0401 on page DI−196.
SYSTEM CHECK DRIVING PATTERN
Refer to DTC P0401 on page DI−196.
INSPECTION PROCEDURE
TOYOTA hand−held tester:
1 Connect TOYOTA hand−held tester and read EGR gas temp. value.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand−held tester main switch ON.
CHECK:
Read EGR gas temp. on the TOYOTA hand−held tester.
OK:
EGR gas temp.: 159°C (318.2°F) or less (Not immediately after driving)
HINT:
If there is a short circuit, the TOYOTA hand−held tester indicates 159.3°C (318.7°F).
NG
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
Exhaust Gas Recirculation Flow Excessive
Detected*
Detection ItemDTC Detecting Condition
− ENGINE (5VZ−FE)
S EGR valve stuck open
S VSV for EGR open malfunction
S Open in VSV circuit for EGR
S Short in EGR gas temp. sensor circuit
S ECM
OK Go to step 4.
Trouble AreaTrouble Area
DI0UY−01