Test H: Next Generation Speed Control (NGSC) Servo Does Not Respond To NGS Tester
WARNING: This page is about a different car, the 2001 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Next Generation Speed Control (NGSC) servo may also be referred to as speed control servo/amplifier assembly.
- Turn ignition switch to OFF position. Disconnect Next Generation Speed Control (NGSC) servo harness connector C152 located in left rear of engine compartment. See Figure . Inspect harness connector for loose, damaged or corroded terminals. Repair harness connector as necessary and retest system for normal operation. If harness connector is okay, reconnect harness connector. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition switch to ON position. Perform data link diagnostic procedure. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM. If NGS tester indicates NGSC: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester indicates NGSC: NO RESPONSE ON CKT 914 (BUS -), go to step 5 .
- Turn ignition switch to OFF position. Disconnect NGS tester. Disconnect NGSC servo harness connector C152. Measure resistance of Tan/Orange wire between terminal No. 1 at NGSC servo harness connector C152 and terminal No. 2 at Data Link Connector (DLC). See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace NGSC servo.
- Disconnect 84-pin harness connector C217 located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. Repair harness connector as necessary and retest system for normal operation. If harness connector is okay, measure resistance of Tan/Orange wire between terminal No. 55 at harness connector C217 and terminal No. 2 at DLC. See Figure and Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Tan/Orange wire between harness connector C217 and DLC.
- Disconnect Black 40-pin harness connector C100 located in left rear of engine compartment. See Figure . Inspect harness connector for loose, damaged or corroded terminals. Repair harness connector as necessary and retest system for normal operation. If harness connector is okay, measure resistance of Tan/Orange wire between terminal No. 1 at NGSC servo harness connector C152 and terminal No. 18 at harness connector C100. See Figure and Fig 1 . If resistance is 5 ohms or less, repair open in Tan/Orange wire between harness connector C217 and female half of harness connector C100. If resistance is greater than 5 ohms, repair open in Tan/Orange wire between male half of harness connector C100 and NGSC servo.
- Turn ignition switch to OFF position. Disconnect NGSC servo harness connector C152. Disconnect NGS tester. Measure resistance of Pink/Light Blue wire between terminal No. 2 NGSC servo harness connector C152 and terminal No. 10 at DLC. See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace NGSC servo.
- Disconnect 84-pin harness connector C217 located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. Repair harness connector as necessary and retest system for normal operation. If harness connector is okay, measure resistance of Pink/Light Blue wire between terminal No. 79 at harness connector C217 and terminal No. 10 at DLC. See Figure and Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Pink/Light Blue wire between harness connector C217 and DLC.
- Disconnect 40-pin harness connector C100 located in left rear of engine compartment. See Figure . Inspect harness connector for loose, damaged or corroded terminals. Repair harness connector as necessary and retest system for normal operation. If harness connector is okay, measure resistance of Pink/Light Blue wire between terminal No. 26 at harness connector C100 and terminal No. 2 at NGSC servo harness connector C152. See Figure and Fig 1 . If resistance is 5 ohms or less, repair open in Pink/Light Blue wire between harness connector C217 and harness connector C100. If resistance is greater than 5 ohms, repair open in Pink/Light Blue wire between harness connector C100 and NGSC servo.