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Wire Harness Side:

Knock Sensor Connector

EKNK

INSPECT ECM (KNK1 VOLTAGE)

Knock Sensor Connector

EKNK

Front View

EKNK

Front View

KNK1

A105992E04

(a) Disconnect the B18 knock sensor connector.

(b) Turn the ignition switch ON.

(c) Measure the voltage between the knock sensor terminals.

Standard voltage

Tester Connections

Specified Conditions

(d) Reconnect the knock sensor connector. NOTICE:

Fault may be intermittent. Check the wire harness and connectors carefully and retest.

REPLACE ECM

CHECK FOR INTERMITTENT PROBLEMS

INSPECT KNOCK SENSOR

Ohmmeter

Knock Sensor

Component Side:

Knock Sensor

(a) Remove the knock sensor.

(b) Measure the resistance between the terminals. Standard resistance

Tester Connections

Specified Conditions

(c) Reinstall the knock sensor.

REPLACE KNOCK SENSOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

DTC

PG335

Crankshaft Position Sensor "A" Circuit

DTC

PG339

Crankshaft Position Sensor "A" Circuit Intermittent

DESCRIPTION

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.

DTC No.

DTC Detection Conditions

Trouble Areas

P0335

When either condition below is met:

• No CKP sensor signal to ECM while cranking (1 trip detection logic)

• No CKP sensor signal to ECM at engine speed of 600 rpm or more (1 trip detection logic)

• Open or short in CKP sensor circuit

• CKP sensor plate

• ECM

P0339

Under conditions (a), (b) and (c), no CKP sensor signal to ECM for 0.05 seconds or more (1 trip detection logic):

(a) Engine speed 1,000 rpm or more

(b) Starter signal OFF

(c) 3 seconds or more have elapsed since starter signal switched from ON to OFF

• Open or short in CKP sensor circuit

• CKP sensor plate

• ECM

Reference: Inspection using an oscilloscope.

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A063955E13

HINT:

• The correct waveform is as shown.

• G2+ stands for the Camshaft Position (CMP) sensor signal, and NE+ stands for the CKP sensor signal.

• Grounding failure of the shielded wire may cause noise in waveforms.

Items

Contents

Terminals

CH1: G2+ - G2-CH2: NE+ - NE-

Equipment Settings

5 V/Division, 20 msec./Division

Conditions

Cranking or idling

MONITOR DESCRIPTION

If there is no signal from the CKP sensor despite the engine revolving, the ECM interprets this as a malfunction of the sensor.

If the malfunction is not repaired successfully, a DTC is set 10 seconds after the engine is next started.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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