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AT1–34
AT340E (2JZ–GE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING
DIAGNOSIS SYSTEM
The Electronically Controlled Transmission has built–in self–diagnostic functions. If a malfunction occurs in the system, the ECM stores the diagnostic trouble code in memory and the O/D OFF (Overdrive OFF) indicator light blinks to inform the driver. The diagnostic trouble code stored in memory can be read out by the following procedure.
O/D OFF
G04310
O/D OFF INDICATOR LIGHT INSPECTION
1. Turn the ignition switch ON.
2. Check if the O/D OFF indicator light lights up when the O/D main switch is pushed out to OFF and goes off when the O/D main switch is pushed in to ON.
HINT: If the O/D OFF indicator light does not light up or stay on all the time, carry out the check for "O/D OFF Indicator Light Circuit" on page AT1–88.
OFF ON
G04238
DIAGNOSTIC TROUBLE CODE CHECK
1. Turn the ignition switch ON, but do not start the engine.
2. Push in the O/D main switch to ON.
HINT: Warning and diagnostic trouble codes can be read only when the O/D main switch is ON. If it is OFF, the O/D OFF indicator light up will light continuously and will not blink.
3. Using SST, connect terminals TE1 and E1 of the DLC 1 or DLC2.
SST 09843–18020
DLC2
DLC2
E1
DLC1
E1
TE1
TE1
D04229 S-17-1
IwJ-23-1-A
Z09025
4. Read the diagnostic trouble code indicated by the number of times the O/D OFF indicator light blinks.
HINT: If the system is operating normally, the light will blink 2 times per second.
0.25 sec.
ON
OFF
0.25 sec.
AT07716