DTC U1016, STORED CODE WITH NO ACTIVE SYMPTOMS. Chevrolet Cavalier 1998

SUBJECT: DTC U1016, STORED CODE WITH NO ACTIVE SYMPTOMS (REPROGRAM PCM)

MODELS: 1998 CHEVROLET CAVALIER 1998 PONTIAC SUNFIRE 1998 TOYOTA CAVALIER WITH 2.2L, 2.4L ENGINE (VINS 4, T - RPOS LN2, LD9) WITH AUTOMATIC TRANSMISSION ONLY

CONDITION:

DURING DIAGNOSIS FOR VARIOUS UNRELATED CONDITIONS, A DTC U1016 MAY BE NOTED AS STORED IN THE PCM WITH NO ACTIVE SYMPTOMS.

IF THERE WERE AN ACTUAL FAILURE, THIS CODE WOULD BE ACCOMPANIED BY A SIMILAR CODE IN THE IP CLUSTER OR IN EACH OF THE DEVICES ON THE UART LINE.

CAUSE:

A CALIBRATION ERROR MAY INDUCE THE PCM TO STORE DTC U1016 AS AN INACTIVE STORED HISTORY CODE DURING VEHICLE KEY-DOWN.

CORRECTION:

IF DURING DIAGNOSTICS FOR OTHER CONDITIONS, A DTC U1016 IS NOTED WITHOUT ANY SYMPTOMS THAT ARE PART OF THE PARAMETER FOR SETTING THE U1016 CODE, REPROGRAM THE PCM WITH THE APPROPRIATE CALIBRATION FROM THE LIST BELOW. THESE CALIBRATIONS ARE AVAILABLE ON 1998 CD-ROM # 9 AND LATER VERSIONS.

SERVICE PROCEDURE:

1. INSTALL A SCAN TOOL AND VERIFY THAT THE PREVIOUSLY NOTED DTC IS SET. 2. NOTE THE CALIBRATION ID CURRENTLY IN THE PCM. 3. REPROGRAM THE PCM WITH THE CALIBRATION NUMBER LISTED IN THE TABLE BELOW. 4. OPERATE THE VEHICLE AND CHECK FOR ANY ADDITIONAL DTC'S. 5. IF THE VEHICLE EXHIBITS A U1016 CODE AFTER BEING REPROGRAMMED, REVIEW THE APPROPRIATE SERVICE MANUAL DIAGNOSTIC PROCEDURES.

CALIBRATION NUMBERS:

USE THE CORRECT CALIBRATION FROM THE LIST BELOW.

NEW BROADCAST OLD BROADCAST ENGINE AND CALIBRATION CODE CALIBRATION CODE TRANSMISSION NUMBER NUMBER USEAGE ------------ ----------- -------- ----------- --------- ------

1998 CHEVROLET CAVALIER AND PONTIAC SUNFIRE -

LN2 AND 3 09364353 CNZY 09355303 CLKW NF2/NB7 SPEED AUTO TRANS LN2 AND 3 09364363 CNZZ 09355313 CLKX K29 SPEED AUTO TRANS LN2 AND 3 09364373 CPAB 09353443 CKHM NA8 SPEED AUTO TRANS LN2 AND 4 09364383 CPAB 09355323 CLKY NF2/NB7 SPEED AUTO TRANS LN2 AND 4 09364393 CPAC 09355333 CLKZ K29 SPEED AUTO TRANS LN2 AND 4 09364403 CPAD 09355343 CLLA NM2 SPEED AUTO TRANS LD9 AND 4 09364413 CPAF 09353813 CKPS NF2 SPEED AUTO TRANS LD9 AND 4 09364423 CPAH 09353823 CKPT NB7 SPEED AUTO TRANS LD9 AND 4 09364433 CPAJ 09353833 CKPU K29 SPEED AUTO TRANS LD9 AND 4 09364443 CPAK 09359493 CMKW NM2 SPEED AUTO TRANS

LD9 AND 4 09364453 CPAL 09353853 CKPX NA8 SPEED AUTO TRANS

1998 TOYOTA CAVALIER -

LD9 AND 4 09364463 CPAM 09362993 CNKN NA3 SPEED AUTO TRANS

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION LABOR OPERATION NUMBER DESCRIPTION TIME

J6355 PROM-REPROGRAMMING 0.4 HR

* DIAGNOSIS TIME MAY BE CLAIMED FOR 0.0 TO 0.3 HOURS DEPENDING ON ACTUAL TIME PERFORMING DIAGNOSIS.

FIGURES: 0 ATTACHMENTS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.