Knock Sensor 1, Checking

Observe all safety precautions: SAFETY PRECAUTIONS .

View clean working conditions: CLEAN WORKING CONDITIONS .

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 appropriate System Wiring Diagram.

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements 

• The mounting bolt of Knock Sensor (KS) 1 -G61- tightened to 20 Nm.
• The Engine Control Module - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window defroster, switched OFF.
• Vehicles with automatic transmission, shift selector lever into position "P" or "N".
• A/C switched OFF.
• Ground (GND) connections between engine/transmission/chassis OK.
• Ignition switched OFF.

Test procedure 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis 

-- Remove the engine covers. Refer to the appropriate Service Information.

-- Disconnect the Knock Sensor (KS) 1 -G61- electrical harness connector -1-.

Checking internal resistance 

-- Using a multimeter, check the Knock Sensor -- terminals 1 to 2 for an internal short.

Specified value: ∞ (Infinity).

If the specified value was Not obtained:

-- Replace the faulty Knock Sensor (KS) 1 -G61-. Refer to appropriate Service Information.

-- Go to Final procedures.

If the specified value was obtained:

-- Remove the Engine Control Module -J623-. Refer to appropriate Service Information.

-- Using a Multimeter, Check the Knock Sensor -- electrical harness connector to the Engine Control Module -J623- electrical harness connector T60 for an open circuit.

Knock Sensor (KS) 1 -G61- electrical harness connector terminals:	Engine Control Module -J623- electrical harness connector T60 terminals:
1	58
2	57
3	42

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit.

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

-- Go to Final procedures.

If the specified value was obtained:

-- Replace the Engine Control Module - J623 -. Refer to appropriate Service Information.

Final procedures 

-- Reinstall the engine cover with air filter, if necessary. Refer to the appropriate Service Information.

-- After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .