
N09214
DI--76
--
DIAGNOSTICS
ENGINE (2RZ--FE, 3RZ--FE)
S
* 2 trip detection logic
When a logic malfunction is fist detected, the mal-
function is temporaily stored in the ECU memory. If
the same malfunction is detected again during the
second drive test, this second detection cases the
check engine warning (CHK ENG) to light up.
The 2 trip repeats the same mode for 2 times. (How-
ever, the IG switch must be turned OFF between the
1st trip and 2nd trip)
S
Freeze frame data:
Freeze frame data records the engine condition
when malfunction is detected.
Because freeze frame data records the engine
conditions (fuel system, calculator load, water tem-
perature, fuel trim, engine speed, vehicle speed,
etc.) when the malfunction is detected, when trou-
bleshooting it is useful for determining whether the
vehicle was running or stopped, the engine warmed
up or not, the air--fuel ratio lean or rich, etc. at the
time of the malfunction.
7
Bus
Line / Pulse generation
During transmission
4
Chassis Ground /
↔
Body Ground 1
Ω
or less
Always
16
Battery Positive /
↔
Body Ground 9
∼
14 V
Always
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of the hand--held tester to
DLC3, turned the ignition switch ON and operated the hand--
held tester, there is a problem on the vehicle side or tool side.
S
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
CLICK HERE TO VIEW CHAPTER INDEX
Pages From Supplement
Terminal No.
Connection / Voltage or Resistance
Condition
(b)
Check the DLC3.
The vehicle’s ECU uses the ISO 14230 for communica-
tion. The terminal arrangement of DLC3 complies with
SAE J1962 and matches the ISO 14230 format.
DLC3
3RZ-F,3RZ-FE