VMM Does Not Display Or Displays Incorrect Information

Ensure engine is running. Inspect fuses No. 6 and 7. If fuse(s) is blown, check circuit(s) for short. Repair or replace as required. See WIRING DIAGRAMS .
Using voltmeter with one lead connected to ground, backprobe VMM connector with other lead to check for battery voltage at terminal No. 1 and at terminal No. 5. See Figure . If battery voltage is not present at both terminals, repair open in circuit(s) between fuse block and terminals No. 1 and 5. If battery voltage is present, circuits are okay. Go to next step.
Turn ignition off. Using ohmmeter, check for continuity between ground and terminals No. 15 and 18 of the VMM connector. See Figure . If continuity is present at both terminals and VMM still does not display, replace VMM.
If continuity is not present, repair open in ground circuit(s). See WIRING DIAGRAMS . If incorrect information is being displayed, perform VMM SELF-DIAGNOSTICS test.
When performing VMM SELF-DIAGNOSTICS test, ensure all vehicle doors are closed. Using ohmmeter, check for infinity between ground and each of following terminals of VMM connector: No. 6, No. 7, No. 8, and No. 9. See Figure . If an open exists in all 4 circuits, circuits are okay. If continuity exists in any circuit, repair that circuit for a short to ground.