Catalyst Temperature Sensor 1 -G20-, CHECKING
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Perform a preliminary check to verify the condition: PRELIMINARY CHECK .
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools and workshop equipment required
- Multimeter
- Electrical connector test lead set
Test Conditions
- Battery voltage 12.5 V
- Fuse OK
- Engine MUST be at room temperature.
- Ignition switched off
Test Procedure
-- Engine MUST be at room temperature.
-- Disconnect the Catalyst Temperature Sensor l -G20- connector. -1-
-- Using a multimeter, check the Catalyst Temperature Sensor l -G20- terminals 1 to 2 for resistance.
Specified value: 230 Ω (+/- 60 Ω) at room temperature.
If the specified value was Not obtained:
-- Replace the Catalyst Temperature Sensor l -G20-
If the specified value was obtained:
-- Turn the ignition switch ON.
-- Using a multimeter, check the Catalyst Temperature Sensor l -G20- terminals 1 to 2 for voltage.
Specified value: 3.32 V (+/-.4 V)
If the specified value was Not obtained:
-- Remove the Engine Control Module -J623-. Refer to the Repair Manual.
-- Using a multimeter, check the Catalyst Temperature Sensor l -G20- electrical harness connector terminals to the Engine Control Module -J623- electrical harness connector T94 terminals for an open circuit according to the wiring diagram.
| Catalyst Temperature Sensor l -G20- electrical harness connector terminals | Engine Control Module -J623- electrical connector T94 terminals |
|---|---|
| 1 | 66 |
| 2 | 82 |
Specified value: 1.5 Ω Max.
If the specified value was Not obtained:
-- Check the wiring for an open, high resistance or short to ground.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If there was no fault found in the wiring and the voltage was not obtained:
-- Replace the Engine Control Module -J623-. Refer to the Repair Manual.
Final Procedures
After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .