Checking Wiring
-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair Information.
-- Using a multimeter, Check the Reducing Agent Tank Heater (Heating Circuit 1) -Z102- / Reducing Agent Temperature Sensor -G685- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness T94 connector for resistance.
| Reduction Agent Temperature Sensor -G685- electrical harness connector: | Engine Control Module (ECM) -J623- electrical harness connector T94 terminals: |
|---|---|
| 3 | 19 |
| 4 | 62 |
Specified value: 1.5 Ω Max.
If the specification was not obtained:
-- Check the wiring for a short circuit to each other, Battery positive, Ground or high resistance.
-- If necessary, repair the faulty wiring connection.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If no malfunction is detected in the wiring and the voltage readings were Not correct:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the service information for removal and installation procedures.