Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis

-- Disconnect the Transmission Control Module -J217- electrical harness connector.

-- Using a multimeter, check the Transmission Control Module -J217- electrical harness connector terminals 34 to 46 for resistance.

Specified value: 60 to 72 Ω (at approx. 20° C)

If the specified value was obtained:

-- Check the TCM power and grounds at the module. Refer to the Wiring Diagram. If power or ground is lost, the TCM will not communicate. Correct any power or ground fault before replacement of any component.

If the TCM has power and ground present, Bus resistance was OK and the TCM does not communicate:

-- Replace the Transmission Control Module -J217-. Refer to the Repair Information.

If the specified Bus resistance was Not obtained:

-- Remove the Engine Control Module -J623-. Refer to the Repair Information.

-- Using a multimeter, check the Transmission Control Module -J217- electrical harness connector to the Engine Control Module -J623- electrical harness connector T94 for resistance.

Transmission Control Module -J217- electrical harness connector terminals:	Engine Control Module -J623- electrical connector T94 terminals:
34 (Can-Bus Low)	67 (Can-Bus Low)
46 (Can-Bus High)	68 (Can-Bus High)

Specified value: 1.5 Ω Max.

If the specified resistance was Not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground.

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring:

-- Replace the Engine Control Module -J623-. Refer to the Repair Information.