golik

This is what I'm facing,
vehicle has knock sonser codes for bank one and bank two, also has a VVT code, codes P0325,P0330 and P1345. Any info would be greatly appreciated.

edfrsd

DTC P0325 OR DTC P0330: KNOCK SENSOR CIRCUIT FAULT

CAUTION: If ECM replacement is instructed in following testing, always
ensure ECM harness connector and ground circuit are okay. If
either are suspect, repair and repeat testing to confirm ECM
malfunction. If ECM is replaced, ECM must be programmed with
proper ignition key code for engine immobilizer system. For
programming procedures, see COMPUTER RELEARN PROCEDURES -
IMPORT article in GENERAL INFORMATION.

Circuit Description

Knock sensors are located on either side of cylinder block underneath
lower intake manifold assembly. Sensor generates voltage when engine
block vibrates due to knocking. ECM retards timing based on this voltage
signal. DTC P0325 and P0330 are set when there is no knock sensor signal
to ECM with engine speed of 2000-5600 RPM. DTC P0325 is for knock sensor
No. 1 on right bank. DTC P0330 is for knock sensor No. 2 on left bank.
Possible causes are:

* Open or short in knock sensor circuit.
* Knock sensor (loose).
* Faulty ECM.

Diagnostic Aids

Normal mode vibration frequency of knock sensor is 7.1 kHz. Using scan
tool, read freeze frame data. Freeze frame records engine conditions when
malfunction is detected.

Diagnosis & Repair

1.Connect scan tool to Data Link Connector (DLC) No. 3. See Fig. 4.
Disconnect EA1 connector. EA1 connector is a wire-to-wire connector
located in engine compartment, near idle air control valve. Connector
is a Dark Gray 4-pin connector.
2.Connect a fused jumper wire between terminal No. 1 of male connector
to terminal No. 2 of female connector. Connect another fused jumper
wire between terminal No. 2 of male connector to terminal No. 1 of
female connector. See Fig. 4. Turn ignition on. Turn scan tool on.
Start and warm engine to normal operating temperature.
3.Snap accelerate engine 3 times to 4000 RPM. Retrieve trouble codes.
See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM.
If same code is repeated as before, go to next step. If code has

<----------------------------------------------------------------------------------->

DTC P1345 OR DTC P1350: VARIABLE VALVE TIMING (VVT) CIRCUIT MALFUNCTION

Circuit Description

NOTE: Variable Valve Timing (VVT) sensor is also known as camshaft
position sensor.

The Variable Valve Timing (VVT) sensor consists of a signal plate and
pick-up coil. Signal plate has one tooth and is mounted on each intake
camshaft. VVT sensor provides feedback to ECM in order to control intake
valve timing. DTC P1345 or P1350 is set when ECM does not sense VVT
sensor signal during cranking for 4 or more seconds. DTC P1345 or P1350
is also set if ECM does not sense VVT sensor signal with engine speed at
600 RPM or more for 5 or more seconds. DTC P1345 or P1350 is also set if
ECM senses VVT sensor signal 5 times while crankshaft rotates 2 times.
DTC P1345 is for bank No. 1 (left cylinder head). DTC P1350 is for bank
No. 2 (right cylinder head). Possible causes are:

* Open or short in VVT sensor circuit.
* Faulty VVT sensor.
* ECM.

Diagnostic Aids

Using scan tool, read freeze frame data. Freeze frame records engine
conditions when malfunction is detected.

Diagnosis & Repair

1.Disconnect suspect VVT sensor connector. Measure resistance between
VVT sensor harness connector terminals. Resistance should be 835-1400
ohms at 14-122° F (-10-50° C), or 1060-1645 ohms at 122-212° F (50-
100° C). Replace VVT sensor as necessary. If resistance is as
specified, go to next step.
2.Check for open or short circuit in wiring harness between ECM
connector and appropriate VVT sensor. Repair as necessary. If wiring
harness is okay, inspect VVT sensor installation, signal plate teeth
and camshaft timing gear. Repair as necessary. If VVT sensor, signal
plate teeth and camshaft timing gear are okay, replace ECM and
retest.

golik

That info is GREATLY appreciated!