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TCM Terminal and Reference Value " .
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AT
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Diagnosis Procedure
INFOID:0000000004305456OK >> GO TO 8.
NG >> GO TO 2. Wiring Diagram - AT - MAIN " and
AT-164, " Wiring Diagram - AT -
PT/SEN " .
3. If OK, check the pulse when vehicle cruises.
OK or NG OK >> GO TO 8.
NG >> GO TO 3. Item Connector Terminal
Judgement standard
(Approx.)
TCM E31, E32 10 - 42
Battery voltage
19 - 42
Name Condition
Turbine revolution
sensor (power train
revolution sensor) When driving at 20 km/h (12 MPH), use the CONSULT-III
pulse frequency measuring function.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle diag-
nosis connector.
*1: A circuit tester cannot be used to test this item.
Item Connector Terminal Name Judgement
standard
(Approx.)
TCM E32 38 Turbine revolution sensor (pow-
er train revolution sensor) 360 Hz B
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OK >> GO TO 4.
NG - 1 >> Battery voltage is not supplied betw een terminals 1 and 3, terminals 1 and ground: GO TO 6.
NG - 2 >> Battery voltage is not supp lied between terminals 1 and 3 only: GO TO 7.
4. CHECK HARNESS BETWEEN TCM AND TURBINE RE VOLUTION SENSOR (POWER TRAIN REVOLU- OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. TCM Terminal and Reference Value " .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >> GO TO 8.
NG >> Repair or replace damaged parts.
6. CHECK HARNESS BETWEEN TCM AND TURBINE REVOLUTION SENSOR [(POWER TRAIN REVOLU-
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3. Check continuity between TCM connector terminals and turbine
revolution sensor (power train revolution sensor) harness con-
nector terminal. Refer to AT-50, " Circuit Diagram " and
AT-169, " Wiring Diagram - AT - MAIN " .
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG OK >> 10A fuse (No.49, located in the IPDM
E/R) or ignition switch are malfunctioning.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND TURBINE R EVOLUTION [(POWER TRAIN REVOLUTION SEN- OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 5. Item Connector Terminal Continuity
TCM E31 10 Yes
Turbine revolu tion sensor
(power train revolution sensor) F47 1
TCM E31 19 Yes
Turbine revolu tion sensor
(power train revolution sensor) F47 1
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Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004305461DTC Confirmation Procedure " .
Is the “ CONTROL UNIT (RAM) ” or “ CONTROL UNIT (ROM) ” displayed again?
YES >> Replace TCM. Refer to
AT-211, " Removal and Installation " .
NO >> INSPECTION END
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MAIN POWER SUPPLY AND GROUND CIRCUIT
Wiring Diagram - AT - MAIN INFOID:0000000004305462
TCM TERMINALS AND REFERENCE VALUES Refer to AT-77, " TCM Terminal and Reference Value " . B
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AT-170< SERVICE INFORMATION >
MAIN POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure INFOID:00000000043054631.
CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
3. Turn ignition switch OFF.
4. Check voltage between TCM connector terminals and ground.
OK or NG OK >> GO TO 3.
NG >> GO TO 2. 2.
DETECT MALFUNCTIONING ITEM
Check the following items:
• Harness for short or open between ignition switch and TCM terminals 10, 19
• Harness for short or open between battery and TCM terminal 28
• 10A fuse (No.13, located in the fuse block) and 10A fuse (No.49, located in the IPDM E/R)
• Ignition switch. Refer to PG-3 .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. 3.
CHECK TCM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between TCM connector terminals and ground.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK SYMPTOM
Drive for a while to check that there is no malfunction.
OK or NG Item
Connec-
tor Terminal Judgement standard (Approx.)
Power supply E31 10 Battery voltage
19 Battery voltage
Power supply
(memory back-up) E32 28 Battery voltage SCIA2656E
Item
Connec-
tor Terminal Judgement standard (Approx.)
Power supply E31 10 0 V
19 0 V
Power supply
(memory back-up) E32 28 Battery voltage SCIA2657E
Item Connector Terminal Continuity
Ground E32 25, 48 - Ground Yes SCIA2671E
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OK >>
INSPECTION END
NG >> GO TO 5. TCM Terminal and Reference Value " .
2. If NG, recheck TCM pin terminals for dam age or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> Repair or replace damaged parts.