Test Procedure

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

Start diagnosis

-- Disconnect the Data Bus On Board Diagnostic Interface -J533- electrical harness connector.

NOTE: The Engine Control Module (ECM) -J623- must remain connected for the following step.

-- Using a multimeter, check the Data Bus On Board Diagnostic Interface -J533- electrical harness T20 connector terminals 6 to 16 for resistance.

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

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery positive 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 and the specified value was Not obtained:

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

If the specified value was obtained: