Test Procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK
Start diagnosis
-- Remove the right vehicle floor cover -arrows-.
Checking internal resistance
-- Disconnect the Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- electrical harness connector.
-- Using a multimeter, check the Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- electrical harness connector terminals 1 to 2 for resistance.
Specified value: 1.0 to 20.0 Ω (at approx. 20°C)
If the specified value was Not obtained:
-- Replace the Heater For Oxygen Sensor 1 After Catalytic Converter -Z29-. Refer to the Repair Information.
If the specified value was obtained:
Checking voltage supply
-- Turn the ignition switch ON.
-- Using a multimeter, check the Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- electrical harness connector terminal 1 to engine ground.
Specified value: Battery voltage.
If the specified value was Not obtained:
-- Check the wiring to Fuse for an open, short or high resistance in circuit (Refer to applicable wiring diagram for fuse positions).
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection and replace any open fuse.
If the specified value was obtained:
Checking Ground activation
-- Remove the Engine Control Module -J623-. Refer to the Repair Information.
-- Using a multimeter, check the Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- electrical harness connector terminal to the Engine Control Module -J623- electrical harness connector for an open circuit according to the chart below.
| Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- electrical harness connector terminal: | Engine Control Module -J623- electrical connector T94 terminal: |
|---|---|
| 2 | 29 |
Specified value: 1.5 Ω max.
If the specified value was Not obtained:
-- Check the wiring for an open or high resistance.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
-- Replace the Engine Control Module -J623-. Refer to the Repair Information.
-- Install the right vehicle floor cover.