TCM Power Supply and Ground Circuit Check

TCM Power Supply and Ground Circuit Check

Circuit Diagram










Troubleshooting


1. Back up power supply circuit check
Confirm that ignition mode of keyless push start system is in "OFF".
Disconnect "E19" and "E20" connectors.
Check for proper terminal connection to "E19" and "E20" connectors.
If connections are OK, check that voltage between "A1" circuit and ground is battery voltage.
Is it in good condition?
YES
Go to Step 2.
NO
Repair or replace defective wire harness.
2. CVT relay power supply circuit (switch side) check
Remove power integration from main fuse box.
Check for proper terminal connection for power integration connector.
If connections are OK, check that voltage between "B1" circuit and ground is battery voltage.
Is it in good condition?
YES
Go to Step 3.
NO
Repair or replace defective wire harness.
3. CVT relay power supply (coil side) circuit check
Push engine switch to change ignition mode to "ON".
Check that voltage between "B2" circuit and ground is battery voltage.
Is it in good condition?
YES
Go to Step 4.
NO
Repair or replace defective wire harness.
4. CVT relay ground circuit check
Check that voltage between "B2" and "B3" circuits are battery voltage.
Is it in good condition?
YES
Go to Step 5.
NO
Repair or replace defective wire harness.
5. CVT relay check
Check CVT relay. Testing and Inspection
Is it in good condition?
YES
Go to Step 6.
NO
Replace CVT relay (power integration).
6. Main power supply circuit check
Push engine switch to change ignition mode to "OFF".
Install power integration.
Push engine switch to change ignition mode to "ON".
Check that voltage between each of "A2" and "A3" circuits and ground are battery voltage.
Are they in good condition?
YES
Go to Step 7.
NO
Repair or replace defective wire harness.
7. TCM ground circuit check
Push engine switch to change ignition mode to "OFF".
Check that resistance between each of "C1" and "C2" circuits and ground are less than 1.
Are they in good condition?
YES
TCM power and ground circuit is in good condition.
NO
Repair or replace defective wire harness.