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Using Jumper Wire

Turn ignition switch to ON position. Using a fused jumper wire, connect Data Link Connector No. 3 (DLC3) terminal No. 4 and terminal No. 13. See Fig 1. Read Malfunction Indicator Light (MIL) in instrument cluster. If DTC 99 is retrieved, see TROUBLE SHOOTING SYMPTOMS  table to continue diagnosis. If any other DTCs are retrieved, see ENGINE IMMOBILIZER DTC DEFINITIONS  table to continue diagnosis. Each code will be displayed in order, starting with lowest code. After checking codes, disconnect jumper wire to turn off display. Erase codes by disconnecting battery terminals or removing EFI fuse.

ENGINE IMMOBILIZER DTC DEFINITIONS

Code Definition
B2785 (1) Ignition Switch On Malfunction
B2786 (1) Ignition Switch Off Malfunction
B2791  Key Unlock Warning Switch Off Malfunction
B2795  Unmatched Key Code
B2796  No Communication In Immobilizer System
B2797  Communication Malfunction No. 1
B2798  Communication Malfunction No. 2
(1) Perform test for ECM POWER SOURCE CIRCUIT (IGNITION KEYED). See appropriate SYSTEM & COMPONENT TESTING article in ENGINE PERFORMANCE.
Fig 1: Identifying Data Link Connector 3 (DLC3) Terminals
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