Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Tundra 2000-2006 Approved 04-06 techinfo.toyota.com ileaf 06toyrm 06toypdf 06rmsrc 06tundra di ata750ea diasys
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DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1145
2UZ-FE)
DIDWD-01
DIAGNOSIS SYSTEM
DESCRIPTION
When troubleshooting On-Board Diagnostic (OBD II) vehicles,
the vehicle must be connected to the OBD II scan tool (comply-
ing with SAE J1987). Various data output from the vehicle's
ECM can then be read.
OBD II regulations require that the vehicle's on-board comput-
er illuminates the Malfunction Indicator Lamp (MIL) on the
instrument panel when the computer detects a malfunction in:
1) The emission control system/components
2) The powertrain control components (which affect vehicle
emissions)
3) The computer
In addition, the applicable Diagnostic Trouble Codes (DTCs)
D14150 prescribed by SAE J2012 are recorded in the ECM memory.
If the malfunction does not reoccur in 3 consecutive trips, the
MIL turns off automatically but the DTCs remain recorded in the
ECM memory.
OBD II Scan Tool To check DTCs, connect the scan tool to the Data Link Connec-
(Hand-held Tester) tor 3 (DLC3) of the vehicle. The scan tool displays DTCs, the
freeze frame data and a variety of the engine data.
The DTCs and freeze frame data can be erased with the scan
tool (See page DI-1148).
CAN VIM NORMAL MODE AND CHECK MODE
The diagnosis system operates in "normal mode" during normal
DLC3
D13872 vehicle use. In normal mode, "2-trip detection logic" is used to
ensure accurate detection of malfunctions. "Check mode" is
also available to technicians as an option. In check mode,
"1-trip detection logic" is used for simulating malfunction symp-
DLC3 toms and increasing the system's ability to detect malfunctions,
including intermittent malfunctions.
1 2 3 4 5 6 7 8 2-TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is tempo-
9 10 11 12 1314 1516 rarily stored in the ECM memory (1st trip). If the ignition switch
is turned OFF and then ON again, and the same malfunction is
D14151 detected again, the MIL will illuminate.
DI-1146 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
FREEZE FRAME DATA
Freeze frame data records the engine conditions (fuel system,
calculated load, engine coolant temperature, fuel trim, engine
speed, vehicle speed, etc.) when a malfunction is detected.
When troubleshooting, freeze frame data can help determine
if the vehicle was running or stopped, if the engine was warmed
up or not, if the air/fuel ratio was Lean or Rich, and other data
from the time the malfunction occurred.
The hand-held tester records freeze frame data in five different
DTC was set.
instances: 1) 3 times before the DTC is set, 2) once when the
B
DTC is set, and 3) once after the DTC is set. These data can be
0.5 sec. 0.5 sec. 0.5 sec. used to simulate the vehicle's condition around the time when
the malfunction occurred. The data may help find the cause of
the malfunction, or judge if the DTC is being caused by a tempo-
L L L L rary malfunction or not.
L
L : Freeze frame data which can be read
D14152
DLC3 (Data Link Connector 3)
The vehicle's ECM uses the ISO 15765-4 for communication
DLC3 protocol. The terminal arrangement of the DLC3 complies with
SAE J1962 and matches the ISO 15765-4 format.
1 2 3 4 5 6 7 8 HINT:
Connect the cable of the hand-held tester to the DLC3, turn the
9 10 11 12 1314 1516 ignition switch ON and attempt to use the hand-held tester. If
the screen displays UNABLE TO CONNECT TO VEHICLE, a
D14151 problem exists in the vehicle side or the tester side.
If the communication is normal when the tool is connected to
another vehicle, inspect the DLC3 on the original vehicle.
If the communication is still impossible when the tool is con-
nected to another vehicle, the problem is probably in the tool it-
self. Consult the Service Department listed in the tool's instruc-
tion manual.
Symbol Terminal No. Name Reference terminal Result Condition
SIL 7 Bus "+" line 5 - Signal ground Pulse generation During transmission
CG 4 Chassis ground Body ground Below 1 Always
SG 5 Signal ground Body ground Below 1 Always
BAT 16 Battery positive Body ground 11 to 14 V Always
HIGH-level CAN
CANH 6 CANL 54 to 69 IG switch OFF
bus line
HIGH-level CAN
CANH 6 Battery positive 1 M or higher IG switch OFF
bus line
HIGH-level CAN
CANH 6 CG 1 k or higher IG switch OFF
bus line
LOW-level CAN
CANL 14 Battery positive 1 M or higher IG switch OFF
bus line
LOW-level CAN
CANL 14 CG 1 k or higher IG switch OFF
bus line
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1147
2UZ-FE)
CHECK BATTERY VOLTAGE
Battery voltage: 11 to 14 V
If voltage is below 11 V, replace the battery before proceeding.
CHECK MIL
(a) Check that the MIL illuminates when turning the ignition
switch ON.
If the MIL does not illuminate, there is a problem in the MIL cir-
cuit (refer to MIL CIRCUIT on page DI-940)
(b) When the engine is started, the MIL should turn off.
ALL READINESS
For this vehicle, using the hand-held tester allows readiness
codes corresponding to all DTCs to be read. When diagnosis
(normal or malfunctioning) has been complete, readiness
codes are set. Enter the following menus: ENHANCED OBD II
/ MONITOR STATUS on the hand-held tester.
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