DTC P2122: Throttle/Pedal Position Sensor/Switch "D" Circuit Low [11/2021 - ]: Procedure

1. Turn the ignition switch to ON.
2. Using GTS, read the DTC of [Engine].

   Powertrain > Engine Control System > Trouble Codes 

   Is DTC P2122 displayed? (Current code)

   Result	Proceed to
   Yes	A
   No (Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.)	B

Result: 

B 

PERFORM SIMULATION TEST 

Result: 

A 

See step  2

1. Turn the ignition switch to OFF.
2. Check for poor contact of ECM and accelerator pedal (with sensor) rod assembly connector.

   Is there poor contact of ECM or accelerator pedal (with sensor) rod assembly connector?

   Result	Proceed to
   Yes (Repair the poor contact of ECM or accelerator pedal (with sensor) rod assembly connector.)	A
   No	B

Result: 

A 

REPAIR CONNECTOR 

Result: 

B 

See step  3

1. Disconnect the connector from ECM.
2. Disconnect the connector from the accelerator pedal (with sensor) rod assembly.
3. Measure the resistance of harness between ECM connector and accelerator pedal position sensor connector.

   Connector & terminal

   A5-51 (AVCC3) - A17-4

   A5-66 (ACCM) - A17-6

   Is the resistance less than 1 Ω?

   Result	Proceed to
   Yes	A
   No (Repair the open circuit of harness between ECM connector and accelerator pedal(with sensor) rod assembly connector.)	B

Result: 

B 

REPAIR HARNESS 

Result: 

A 

See step  4

1. Measure the resistance between the ECM connector and engine ground.

   Connector & terminal

   A5-51 (AVCC3) - Engine ground

   A5-66 (ACCM) - Engine ground

   Is the resistance 1 MΩ or more?

   Result	Proceed to
   Yes	A
   No (Repair the short circuit to ground in harness between ECM connector and accelerator pedal (with sensor) rod assembly connector.)	B

Result: 

B 

REPAIR HARNESS 

Result: 

A 

See step  5

1. Connect the connector to ECM.
2. Turn the ignition switch to ON.
3. Measure the voltage between accelerator pedal (with sensor) rod assembly connector and chassis ground.

   Connector & terminal

   A17-4 - Chassis ground

   Is the voltage 4.5 - 5.5 V?

   Result	Proceed to
   Yes (Replace the accelerator pedal (with sensor) rod assembly.)	A
   No (Replace the ECM.)	B

Result: 

A 

REPLACE ACCELERATOR PEDAL (WITH SENSOR) ROD ASSEMBLY 

Refer to REMOVAL [11/2021 - ]

Result: 

B 

REPLACE ECM 

Refer to REMOVAL [11/2021 - ]