Throttle Position Sensor And Accelerator Pedal Position Sensor 2 Checking

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram

Test requirement 

• The Engine Control Module (ECM) - 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 connections between engine/transmission/chassis OK.

Test procedure 

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

Start diagnosis 

-- Using a screwdriver, remove the steering column cover -arrows-.

-- Disconnect the Throttle Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185- electrical harness connector -2-.

Checking voltage supply 

-- Switch the ignition On.

-- Using a multimeter, check the following wiring connections for voltage.

Throttle Position Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- electrical harness connector terminal	Specified value
1 to Ground	near 5 V
1 to 5	near 5 V
2 to Ground	near 5 V
2 to 3	near 5 V

-- Switch the ignition Off.

If the specified values were obtained:

-- Replace the Throttle Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185-.

If any of the specified values were Not obtained:

Checking wiring 

If the manufacturers test box is being used. Perform the following step.

-- Install the test box.

If the manufacturers test box is not being used. Perform the following step.

-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Using a multimeter, check the Throttle Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical connector T121 for resistance.

Throttle Position Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- electrical harness connector terminals	Engine Control Module (ECM) -J623- electrical connector T121 terminals or test box socket
1	72
2	73
3	36
4	35
5	33
6	34

Specified value: 1.5 Ω max.

If the specification is Not obtained:

-- Check the wiring for a short circuit to each other, Battery (+) and Ground.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the voltage supply was OK:

-- Replace the Throttle Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185-.

If no malfunction is found in wiring:

-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify repair.

If the DTC does Not return:

Generate readiness code. Refer to READINESS CODE .

If the DTC returns, no malfunction is found in the wiring and voltage supply was OK:

-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Assembly is performed in the reverse of the removal.

Final procedures 

After 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 .