Toyota T100 1996 Service Manual page 268

DI−4
DLC3
Terminal No.
2
4
5
16
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
N09214
Connection / Voltage or Resistance
Bus Line / Pulse generation
Chassis Ground ↔ Body Ground / 1 Ω or less
Signal Ground ↔ Body Ground / 1 Ω or less
Battery Positive ↔ Body Ground / 9 − 14 V
− ENGINE (3RZ−FE)
The 2 trip repeats the same mode a 2nd time (How-
S
ever, the ignition switch must be turned OFF be-
tween the 1st trip and 2nd trip.).
Freeze frame data:
S
Freeze frame data records the engine condition
when a misfire (DTCs P0300 − P0304) or fuel trim
malfunction (DTCs P0171, P0172) or other mal-
function (first malfunction only), is detected.
Because freeze frame data records the engine
S
conditions (fuel system, calculator load, engine
coolant temperature, fuel trim, engine speed, ve-
hicle speed, etc.) when the malfunction is detected,
when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the en-
gine warmed up or not, the air−fuel ratio lean or rich,
etc. at the time of the malfunction.
Priorities for troubleshooting:
If troubleshooting priorities for multiple DTCs are given in the
applicable DTC chart, these should be followed.
If no instructions are given troubleshoot DTCs according to the
following priorities.
(1) DTCs other than fuel trim malfunction (DTCs
P0171, P0172), EGR (DTCs P0401, P0402), and
misfire (DTC P0300 − P0304).
(2) Fuel trim malfunction (DTCs P0171, P0172), and
EGR (DTCs P0401, P0402).
(3) Misfire (DTCs P0300 ∼ P0304).
(b) Check the DLC3.
The vehicle's ECM uses V.P.W. (Variable Pulse Width) for
communication to comply with SAE J1850. The terminal
arrangement of DLC3 complies with SAE J1962 and
matches the V.P.W. format.
Condition
During transmission
Always
Always
Always