P0332

This article has been updated by technical service bulletin 09 13 004 dated April 2009.

DTC P0332: Knock Sensor Circuit Low (Bank 2)

Knock Sensor 2 Circuit:

CIRCUIT OPERATION
- The knock sensor (terminal No. 1) sends a signal voltage to the ECM (terminal No. 28). .
- The ground terminal (terminal No. 2) is grounded with ECM (terminal No. 29).

TECHNICAL DESCRIPTION
- The ECM applies 5 V from the ground terminal side to judge a malfunction in the knock sensor circuit.
- The ECM judges whether the knock sensor signal circuit has a short circuit to the ground or an open circuit by checking the input voltage from the knock sensor.
- When the knock sensor output voltage is below the reference voltage, it is judged that a malfunction exists.

DTC SET CONDITIONS

Check Condition
- 2 seconds or more have passed since the engine starting sequence was completed.

Judgement Criterion
- Knock sensor 2 output voltage has continued to be lower than 0.5 volt for 2 seconds.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Knock sensor 2 failed.
- Harness damage.
- Connector damage.
- ECM failed.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

STEP 1. Check harness connector B-20 at the knock sensor 2 and harness connector B-10 at ECM for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 2.

NO : Repair or replace it. Refer to General (Electrical), Harness Connector Inspection. Then go to Step 4.

STEP 2. Check for short circuit to ground between knock sensor 2 connector B-20 and ECM connector B-10.




1. Disconnect the connector B-20 and B-10 measure at the harness side.
2. Check for the continuity between connector B-20 (terminal No. 1) and ground.
- Not continuity.

Q: Is the harness wire in good condition?

YES : Go to Step 3.

NO : Repair it. Then go to Step 4.

STEP 3. Replace the knock sensor 2.

1. Replace the knock sensor 2.






CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

2. Connect scan tool MB991958 to the data link connector.
3. Turn the ignition switch to the "ON" position.
4. Erase the DTC.
5. Start the engine, and leave it idling for more than 2 seconds. Then stop the engine.
6. After completing the test drive, read the DTC.
7. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P0332 set?

YES : Replace the ECM. When the ECM is replaced, register the ID code. Refer to Diagnosis-ID Codes Registration Judgment Table [Vehicles with KOS] or Diagnosis-ID Codes Registration Judgment Table [Vehicles with WCM].

NO : The inspection is complete.

STEP 4. Using scan tool MB991958, read the diagnostic trouble code (DTC).

1. Turn the ignition switch to the "ON" position.
2. Start the engine, and leave it idling for more than 2 seconds. Then stop the engine.
3. After completing the test drive, read the DTC.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P0332 set?

YES : Retry the troubleshooting.

NO : The inspection is complete.