Pinpoint Test T: No Module/Network Communication - No Power To The Diagnostic Tool
WARNING: This page is about a different car, the 2005 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- T1 CHECK THE DIAGNOSTIC TOOL CONNECTOR FOR DAMAGE
- Inspect the diagnostic tool pins for damage.
- Are the pins OK?
- Yes : GO to T2.
- No : REPAIR the diagnostic tool connector. CARRY OUT the diagnostic tool data link test.
- T2 CHECK THE DATA LINK CONNECTOR (DLC) C251 FOR DAMAGE
- Key in OFF position.
- Inspect the DLC C251 pins for damage.
- Are the pins OK?
- Yes : GO to T3.
- No : REPAIR the DLC C251. CARRY OUT the diagnostic tool data link test.
- T3 CHECK CIRCUIT 40 (LB/WH) FOR VOLTAGE AT THE DLC C251
- Key in ON position.
- Measure the voltage between the DLC C251 pin 16, circuit 40 (LB/WH), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to T4.
- No : REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
- T4 CHECK CIRCUITS 57 (BK) AND 570 (BK/WH) FOR AN OPEN AT THE DLC C251
- Measure the resistance between the DLC C251 pin 4, circuit 57 (BK), harness side and ground; and between the DLC C251 pin 5, circuit 570 (BK/WH), harness side and ground.
- Are the resistances less than 5 ohms?
- Yes : REPAIR the diagnostic tool. CARRY OUT the diagnostic tool data link test.
- No : REPAIR the circuit in question. CARRY OUT the diagnostic tool data link test.