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- harness connector.
The Engine Control Module -J623- must remain connected for the following step.
-- Using a multimeter, check the Data Bus On Board Diagnostic Interface -J533- 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 -J623-. Refer to the appropriate repair information.
If the specified value was obtained:
Checking wiring
-- Remove the Engine Control Module -J623-. Refer to the appropriate repair information.
-- Using a multimeter, check the Data Bus On Board Diagnostic Interface -J533- harness connector T73b to the Engine Control Module -J623- harness connector T91 for resistance.
| Data Bus On Board Diagnostic Interface -J533- harness connector T73b terminals: | Engine Control Module -J623- harness connector T91 terminals: |
|---|---|
| 18 (Can-Bus Low) | 80 |
| 19 (Can-Bus High) | 79 |
Specified value: 1.5 Ω Max.
If the specified value 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 Data Bus On Board Diagnostic Interface -J533-.