PCM

CHIME/BUZZER (Continued)

If these conditions are met and there is still a problem with the system, refer to Electrical, Chime/ Buzzer, Diagnosis and Testing - Chime System Conditions.

DIAGNOSIS AND TESTING - CHIME SYSTEM CONDITIONS

NO TONE WHEN IGNITION SWITCH IS TURNED ON AND DRIVERS SEAT BELT IS UNBUCKLED

(1) Using an ohmmeter, with the seat belt fully retracted, check for continuity to ground at Pin 25 of the 26-way cluster harness connector. If OK, go to Step 2. If not OK, repair as necessary. (2) Using voltmeter, check for battery feed at Pin 21 of the 26-way cluster harness connector. Check for ignition feed at Pin 15 of the 26-way cluster harness

• connector. If not OK, repair as necessary.

NO FASTEN SEAT BELT LAMP WHEN IGNITION SWITCH IS ON

(1) Check for battery feed at cluster harness connector Pin 21. (2)

• Check for ignition feed at cluster harness connector Pin 15. Repair as necessary.

NO TONE WHEN HEADLAMPS ARE ON AND DRIVERS DOOR IS OPEN

• (1) Remove the key from the ignition.
• (2) Check left door jamb switch for good ground

3. when drivers door is open. (3) Check for ground at Pin 10 of the 26-way cluster harness connector. (4) Check for battery feed at cluster harness connector Pin 21 of the 26-way cluster harness connector. (5) Check for NO voltage at Pin 15. Ignition voltage must not be present for the chime to work.

• (6) Check headlamp switch.

NO TONE WHEN KEY IS LEFT IN IGNITION AND DRIVERS DOOR IS OPEN

(1) Check for continuity to ground at Pin 10 of the 26-way cluster harness connector. If OK, go to Step 3. If not OK, repair as necessary. (2) Using voltmeter, check for battery feed at Pin 21 of the 26-way cluster harness connector. Check for NO ignition feed at Pin 15 of the 26-way cluster harness connector. If OK, go to Step 3. If not OK, repair as necessary. (3) Open driver's door and ensure the ignition key is in the OFF, LOCK, or ACC position. Check for continuity to ground at Pin 24 of the 26-way cluster harness connector. If ground OK, replace cluster printed circuit board. If no ground, check key-in switch or

• door switch wiring and repair as necessary.

ELECTRONIC CONTROL MODULES

TABLE OF CONTENTS

Table Caption: This table appears to be an index or table of contents for a technical manual, listing various procedures, components, and their corresponding page numbers. It covers topics like operational procedures, diagnostic trouble codes, and component removal/installation for different engine sizes, as well as details on the Sentry Key Immobilizer Module.

ELECTRONIC CONTROL MODULES

STANDARD PROCEDURE - PCM/SKIM

PROGRAMMING

COMMUNICATION

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . 2

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CONTROLLER ANTILOCK BRAKE

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . . 4

OPERATION

REMOVAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 5

DATA LINK CONNECTOR

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . . 5

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

POWERTRAIN CONTROL MODULE

DESCRIPTION

OPERATION - SENSOR RETURN - PCM

INPUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

OPERATION - DATA BUS COMMUNICATION

RECEIVE - PCM INPUT

. . . . . . . . . . . . . . . . . . 6

OPERATION - IGNITION SENSE - PCM

INPUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

OPERATION - PCM GROUND

OPERATION

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 6

ELECTRONIC CONTROL MODULES

STANDARD PROCEDURE - PCM/SKIM PROGRAMMING

NOTE: Before replacing the PCM for a failed driver, control circuit or ground circuit, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most PCM driver/control circuit failures are caused by internal component failures (i.e. relay and solenoids) and shorted circuits (i.e. pull-ups, drivers and switched circuits). These failures are difficult to detect when a double fault has occurred and only one DTC has set.

When a PCM (SBEC) and the SKIM are replaced at the same time perform the following steps in order:

• (1) Program the new PCM (SBEC)
• (2) Program the new SKIM
• (3) Replace all ignition keys and program them to the new SKIM.

PROGRAMMING THE PCM (SBEC)

The SKIS Secret Key is an ID code that is unique to each SKIM. This code is programmed and stored in the SKIM, PCM and transponder chip (ignition keys). When replacing the PCM it is necessary to program the secret key into the new PCM using the DRB III. Perform the following steps to program the secret key into the PCM.

• (1) Turn the ignition switch on (transmission in park/neutral).
• (2) Use the DRB III and select THEFT ALARM, SKIM then MISCELLANEOUS.
• (3) Select PCM REPLACED (GAS ENGINE).
• (4) Enter secured access mode by entering the vehicle four-digit PIN.
• (5) Select ENTER to update PCM VIN.

INSTALLATION

. .