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ECM - Engine Surge While Driving

Classification:
EC01-019

Reference:
ITB01-054

Date:
September 11, 2001

2001 I30; ENGINE SURGE DURING DRIVING

APPLIED VEHICLE:
2001 I30 (CA33)

APPLIED VINs:
Vehicles built before: JNKCA31A*1T025512

APPLIED DATE:
Vehicles built before: January 19, 2001

SERVICE INFORMATION

If an applied vehicle exhibits engine surge, approximately once every second, during the following driving conditions:

^ Steady driving (on a flat surface) between 40 - 60 MPH

^ Slightly accelerating between 40 - 60 MPH

^ Driving up a slight grade between 40 - 60 MPH

The cause may be the fluctuation of the Throttle Position Sensor voltage caused by the ECM. Refer to the Service Procedure below to resolve the incident, if it should occur.

SERVICE PROCEDURE

1. Connect CONSULT-II and turn it on.

2. Select the following items in CONSULT:

^ Engine

^ Data Monitor

^ Select from Menu:

- Throttle Position Sensor Voltage

- Ignition Timing

3. Monitor the throttle position sensor voltage and ignition timing under the incident driving conditions (listed above).

A. If the throttle position sensor voltage fluctuates (even though the accelerator pedal is held steady) and the ignition timing drops to zero each time the vehicle surges (about once per second), proceed with step 4.

B. If the throttle position sensor voltage does NOT fluctuate and the ignition timing does NOT drop to zero each time the vehicle surges (about once per second), refer to the applicable Service Manual to look for other causes of the incident.

4. Replace the ECM. Refer to the Parts Information table for the ECM P/N.

ATTENTION
There are additional work items that may be required when installing this reprogrammable ECM.

Failure to perform these items can result in no-start, poor driveability or MIL "ON" incident.

1. Check ASIST for available ECM data updates. If available, reprogram the ECM with the latest data.*

2. If the vehicle has NATS, all customer ignition keys, including spares, must be re-registered.*

3. If applicable, CONSULT-II idle air volume learning procedure must be performed to achieve a proper idle setting.*

* Refer to Technical Bulletin ITB00-038b for vehicle applicability information, procedures, and associated claims information.





PARTS INFORMATION

CLAIMS INFORMATION





Submit a Primary Failed Part (PP) line claim using the claims coding table as shown.