DESCRIPTION & OPERATION
Note. For additional information on transmission operation, see appropriate OVERHAUL article.
Test Description
The numbers listed below refer to step numbers in the diagnostic procedure
- 1) This step determines if the scan tool is receiving power through the DLC connector.
- 2) The MIL should illuminate whenever the ignition is on and the engine is not running.
- 3) This step determines if the PCM is transmitting class 2 serial data to the DLC and that the class 2 data circuit is not open or shorted.
- 4) This step determines if a DTC is current or stored in history.
CONNECTOR IDENTIFICATION
Note. Harness connectors shown do not apply to every vehicle. Some connectors are model specific, depending upon equipment application. For connector identification, refer to appropriate illustrations. (Scheme 456)- (Scheme 470).
Scheme 456
Scheme 456: CONNECTOR IDENTIFICATION
Scheme 457
Scheme 458
Scheme 459
Scheme 460
Scheme 461
Scheme 462
Scheme 463
Scheme 464
Scheme 465
Scheme 466
Scheme 467
Scheme 468
Scheme 469
Scheme 470
Transmission Electronic Control System Wiring Diagram (2001-02 Astro & Safari). Scheme 471
Scheme 471: Transmission Electronic Control System Wiring Diagram (2001-02 Astro & Safari)
Transmission Electronic Control System Wiring Diagram (2001-02 Avalanche, Escalade, Escalade Ext, Sierra, Silverado, Suburban, Tahoe, Yukon & Yukon XL - 4.8L, 5.3L & 6.0L). Scheme 472
Scheme 472: Transmission Electronic Control System Wiring Diagram (2001-02 Avalanche, Escalade, Escalade Ext, Sierra, Silverado, Suburban, Tahoe, Yukon & Yukon XL - 4.8L, 5.3L & 6.0L)
Transmission Electronic Control System Wiring Diagram (2001-02 Blazer, Bravada, Jimmy (2001), Jimmy Canadian (2002) Sonoma & S10 Pickup - 4.3L). Scheme 473
Scheme 473: Transmission Electronic Control System Wiring Diagram (2001-02 Blazer, Bravada, Jimmy (2001), Jimmy Canadian (2002) Sonoma & S10 Pickup - 4.3L)
Transmission Electronic Control System Wiring Diagram (2001-02 Bravada, Envoy, Envoy XL & TrailBlazer - 4.2L). Scheme 474
Scheme 474: Transmission Electronic Control System Wiring Diagram (2001-02 Bravada, Envoy, Envoy XL & TrailBlazer - 4.2L)
Transmission Electronic Control System Wiring Diagram (2001-02 Camaro & Firebird - 3.8L). Scheme 475
Scheme 475: Transmission Electronic Control System Wiring Diagram (2001-02 Camaro & Firebird - 3.8L)
Transmission Electronic Control System Wiring Diagram (2001-02 Camaro & Firebird - 5.7L). Scheme 476
Scheme 476: Transmission Electronic Control System Wiring Diagram (2001-02 Camaro & Firebird - 5.7L)
Transmission Electronic Control System Wiring Diagram (2001-02 Corvette). Scheme 477
Scheme 477: Transmission Electronic Control System Wiring Diagram (2001-02 Corvette)
Transmission Electronic Control System Wiring Diagram (2001-02 Express & Savana - 4.3L, 5.0L & 5.7L). Scheme 478
Scheme 478: Transmission Electronic Control System Wiring Diagram (2001-02 Express & Savana - 4.3L, 5.0L & 5.7L)
Transmission Electronic Control System Wiring Diagram (2001-02 Sierra & Silverado - 4.3L). Scheme 479
Scheme 479: Transmission Electronic Control System Wiring Diagram (2001-02 Sierra & Silverado - 4.3L)
Transmission Electronic Control System Wiring Diagram (2001-02 Sonoma & S10 Pickup - 2.2L). Scheme 480
Scheme 480: Transmission Electronic Control System Wiring Diagram (2001-02 Sonoma & S10 Pickup - 2.2L)
