Automatic Transmission System Tcm Power Source Circuit
Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND)
CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - TCM)
AUTOMATIC TRANSMISSION SYSTEM - TCM Power Source Circuit |
DESCRIPTION
When the engine switch is turned on (IG), the battery voltage is applied to the IGSW of the TCM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the EFI MAIN NO. 1 relay and supplying power to terminal +B of the TCM.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
| 1.CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND) |
Disconnect the TCM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
A80-1 (GND) - Body ground
| Always
| Below 1 Ω
|
Text in Illustration*a
| Rear view of wire harness connector
(to TCM)
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - TCM) |
Disconnect the No. 2 integration relay 1R and 1S connectors.
Disconnect the A80 TCM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
1S-11 - A80-10 (+B)
| Always
| Below 1 Ω
|
1R-8 - A80-21 (IGSW)
| Always
| Below 1 Ω
|
1S-11 or A80-10 (+B) - Body ground
| Always
| 10 kΩ or higher
|
1R-8 or A80-21 (IGSW) - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK |
|
|
|
| GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM / SFI SYSTEM) (Click here) |
|
