Self-Diagnostic System

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Using NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester displays NO RESP/NOT EQUIP for speed control servo, perform TEST A: NO COMMUNICATION WITH SPEED CONTROL SERVO under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform speed control servo self-test. Perform appropriate test in accordance with DTC retrieved. See SPEED CONTROL SERVO DTC INDEX table. Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.

SPEED CONTROL SERVO DTC INDEX

DTC ⁽¹⁾

Description

Perform Test

B1318

Battery Voltage Low

B1342

ECU Defective

⁽²⁾

C1109

Throttle Position Did Not Return To Idle after Self-Test

C1126

Speed Control Switch Stuck For 2 Minutes Or Longer

C1127

Deactivator Switch Circuit Failure

C1179

Speed Control Servo Cable Slack Failure

⁽¹⁾	Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article.

⁽²⁾	Using NGS tester, retrieve and document all continuous DTCs. Perform speed control servo self-test. If DTC B1342 is retrieved again, replace speed control servo.