Navigation Unit Inputs and Outputs for Connector C (8P)

Terminal Number | Wire Color | Terminal Name | Description | Voltage (about) | Symptom
--- | --- | --- | --- | --- | ---
1 | WHT | +B (+B Power source) | Continuous power source | Battery voltage | If open: Display picture goes out (display back light still on). NOTE: System will reboot to ‘‘enter code'' screen. If short to ground: Blows fuse No. 7 (10 A) in the under-dash fuse/relay box.
2 | RED | ACC (Accessory) | Power source for accessories | Battery voltage at ACC (I) | If open: Display picture goes out (display back light still on). NOTE: When re-connected the system will reboot to ‘‘enter code'' screen. If short to ground: Blows fuse No. 32 (7.5 A) in the under-dash fuse/relay box.
4 | BLK | GND (Ground) | Ground for navigation unit | 0 V | If open: No effect on system. If short to ground: No effect on system.
5 | GRN | BACK LT (Back light) | Reverse signal of select laver from ‘‘Multiplex Integrated Control Unit'' (A/T) or backup light switch (M/T) | In reverse, battery voltage: Otherwise 0 V | If open: Navigation never sees reverse. Diagnostic screen ‘‘Car Status'', ‘‘Back''=0. If short to ground: Blows fuse No. 21 (7.5 A) in the under-dash fuse/relay box.
6 | LT BLU | VSP (Vehicle speed pulse) | Vehicle speed pulse signal from PCM | Pulses 0−5 V: Average 2.5 V, when moving | If open: No vehicle speed pulses. Diagnostic screen ‘‘Car Status'', VSP Navi=0. If short to ground: No vehicle speed pulses. Diagnostic screen ‘‘Car Status'', VSP Navi=0.
7 | BRN | DIAG P (Diagnostic positive) | Service check signal for navigation system | 5−6 V | If open: No effect on system. If short to ground: System goes into diagnostic mode.
8 | GRY | DIAG N (Diagnostic negative) | Ground for service check signal | 0 V | If open: No effect on system. If short to ground: No effect on system.