Checking CAN Bus Wiring
-- Remove the engine control module Engine Control Module (ECM) - J623 -. Refer to the service information for removal and installation procedures.
-- Using a multimeter, measure the resistance of the circuit between the NOx Sensor Module -J583- and the engine control module Engine Control Module (ECM) - J623 -. Refer to the applicable wiring diagram.
| NOx Sensor Module -J583- electrical harness connector terminal | Engine Control Module -J623- electrical harness connector T94 terminals |
|---|---|
| 3 | 35 |
| 4 | 36 |
Specified value: 1.5 Ω Max.
If the specification was not obtained:
-- Check the wires for a short circuit to each other, a short to battery voltage, and a short to ground.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- Repair as necessary.
-- Go to Final Procedures
If the specified value was obtained:
-- Replace the Engine Control Module (ECM) - J623 - Refer to appropriate service information.