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Diagnostic Procedure=NBAT0208
1 CHECK DTC
With CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for A/T with CONSULT-II.
2. Touch ªERASEº.
PERFORM DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
See previous page.
Is the ªCONTROL UNIT (RAM) or CONTROL UNIT (ROM)º displayed again?
Ye s©Replace TCM.
No©INSPECTION END
DTC CONTROL UNIT (RAM), CONTROL UNIT (ROM)
Diagnostic Procedure
AT-212
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SAT574J
DescriptionNBAT0215The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGICNBAT0215S01
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: CONT UNIT (EEP ROM)TCM memory (EEP ROM) is malfunc-
tioning.TCM
SAT014K
SAT971J
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0215S02NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº and wait at least 5 seconds before conducting
the next test.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for A/T with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
GI
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DTC CONTROL UNIT (EEP ROM)
Description
AT-213
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Diagnostic Procedure=NBAT0216
1 CHECK DTC
With CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for A/T with CONSULT-II.
2. Move selector lever to ªRº position.
3. Depress accelerator pedal (Full throttle position).
4. Touch ªERASEº.
5. Turn ignition switch ªOFFº position for 10 seconds.
PERFORM DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
See previous page.
Is the ªCONTROL UNIT (EEP ROM)º displayed again?
Ye s©Replace TCM.
No©INSPECTION END
DTC CONTROL UNIT (EEP ROM)
Diagnostic Procedure
AT-214
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Wiring Diagram Ð AT Ð NONDTCNBAT0203
MAT059B
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TROUBLE DIAGNOSES FOR SYMPTOMS
Wiring Diagram Ð AT Ð NONDTC
AT-215
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MAT919A
TROUBLE DIAGNOSES FOR SYMPTOMS
Wiring Diagram Ð AT Ð NONDTC (Cont'd)
AT-216
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MAT920A
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TROUBLE DIAGNOSES FOR SYMPTOMS
Wiring Diagram Ð AT Ð NONDTC (Cont'd)
AT-217
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1. O/D OFF Indicator Lamp Does Not Come OnNBAT0073SYMPTOM:
O/D OFF indicator lamp does not come on for about 2 seconds
when turning ignition switch to ªONº.
1 CHECK TCM POWER SOURCE STEP 1
1. Turn ignition switch to ON position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
SAT611J
OK or NG
OK©GO TO 2.
NG©GO TO 3.
2 CHECK TCM POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.
2. Check voltage between TCM terminal 28 and ground.
SAT612JC
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING ITEM
Check the following items:
IHarness for short or open between ignition switch and TCM terminals 10, 19 and 28 (Main harness)
IIgnition switch and 10A or 7.5A fuse [No. 18 or 24, located in the fuse block (J/B)]
Refer to EL-9, ªSchematicº.
OK or NG
OK©GO TO 4.
NG©Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
1. O/D OFF Indicator Lamp Does Not Come On
AT-218
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4 CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 25, 48 and ground. Refer to wiring diagram Ð AT Ð MAIN.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK LAMP CIRCUIT
1. Turn ignition switch to ªONº position.
2. Set overdrive control switch to ªONº position.
3. Check voltage between TCM terminals 13 and ground.
SAT529J
Does battery voltage exist?
Ye s©GO TO 7.
No©GO TO 6.
6 CHECK MALFUNCTIONING ITEM
Check the following items:
IFuse
IO/D OFF indicator lamp
IHarness for short or open between ignition switch and O/D OFF indicator lamp (Main harness)
IRefer to EL-9, ªSchematicº.
IHarness for short or open between O/D OFF indicator lamp and TCM
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
7 CHECK SYMPTOM
Check again.
OK or NG
OK©INSPECTION END
NG©GO TO 8.
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TROUBLE DIAGNOSES FOR SYMPTOMS
1. O/D OFF Indicator Lamp Does Not Come On (Cont'd)
AT-219