Signal specification Road Traffic Information (RTI)
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
All values given below are between the respective terminal in column 1 and terminal 8B (ground) unless otherwise stated in brackets after the table entry.
The MSA engine control module (ECM) terminals A1-A30 correspond to #1-#30 on the breakout box.
The RTI control module terminals B1-B16 correspond to #31-#46 on the breakout box.
NOTE:
It is important to connect the breakout box according to Connecting the breakout box and check the ground terminal before measuring.
Connector A, A1-A30
| U= | DC voltage in volts (V) | f= | Frequency in Hertz (Hz) |
| Ulow= | Voltage approximately 0 V | % duty= | Duty cycle (pulse ratio) as a percentage (%) |
| Ubat= | BATTERY TOO LOW |
| Terminal | Signal type | Ignition on | Remarks |
|---|---|---|---|
| A1 | - | - | - |
| A2 | - | - | - |
| A3 | - | - | - |
| A4 | Trigger and check signal, CD-ROM player to control module | Digital signal | - |
| A5 | Trigger and check signal, control module to CD-ROM player | Digital signal | - |
| A6 | Synchronizing signal CD-ROM player | Digital signal | - |
| A7 | Shield ground, cabling from CD-ROM player | Ulow | - |
| A8 | Signal for map data, CD-ROM player | Digital signal | - |
| A9 | Signal (-) from audio unit | Alternating current on sound to loudspeaker | - |
| A10 | Signal (-) to loudspeaker, driver's door | Alternating current on sound to loudspeaker | - |
| A11 | Signal, remote control from display | Digital signal | - |
| A12 | Signal ground, display | Ulow | - |
| A13 | Color signal (blue), screen | Alternating current when blue color displayed | - |
| A14 | Color signal (red), screen | Alternating current when red color is displayed | - |
| A15 | - | - | - |
| A16 | - | - | - |
| A17 | - | - | - |
| A18 | Checking and data signal from display to CD-ROM player | Digital signal | - |
| A19 | Checking and data signal from CD-ROM player to display | Digital signal | - |
| A20 | Signal ground, CD-ROM player | Ulow | - |
| A21 | - | - | - |
| A22 | - | - | - |
| A23 | Screen ground for map data, CD-ROM player | Ulow | - |
| A24 | Signal for map data, CD-ROM player | Digital signal | - |
| A25 | Signal (-) from audio unit | Alternating current on sound to loudspeaker | - |
| A26 | Signal (-) to loudspeaker, driver's door | Alternating current on sound to loudspeaker | - |
| A27 | Function selector signal control module/TV-monitor (different remote controls) | System off: U=2 V System on: U=0 V |
- |
| A28 | Shield ground, cable to screen | Ulow | - |
| A29 | Synchronizing signal, Display | Digital signal | - |
| A30 | Color signal (green), display | Alternating current when green color displayed | - |
Connector B B1-B16
| U= | DC voltage in volts (V) | f= | Frequency in Hertz (Hz) |
| Ulow= | Voltage approximately 0 V | % duty= | Duty cycle (pulse ratio) as a percentage (%) |
| Ubat= | Battery voltage |
| Terminal | Signal type | Ignition on/engine idling | Remarks |
|---|---|---|---|
| B1 | 30-supply (Power supply from battery) | Ubat | - |
| B2 | X-supply (power supply from ignition switch, positions I and II) | Ubat | - |
| B3 | Signal, vehicle speed (from combined instrument panel) | U=0.5 V or Ubat (Voltage depends on position of front wheel - the position of the pulse wheel in relation to the sensor) |
A pulsed signal between 0 V and Ubat with a variable frequency and pulse ratio (% duty) |
| B4 | Signal, light switch | Lighting on: Ubat Lighting off: Ulow |
Changes light strength on the screen |
| B5 | 30-supply to TMC receiver (FM-receiver in Japan) | Ubat | - |
| B6 | X-supply to TMC receiver (FM-receiver in Japan) | Ubat | - |
| B7 | TMC receiver (Japan, FM receiver) | Digital signal | - |
| B8 | Ground, control module (measured against battery negative terminal) | Ulow | - |
| B9 | Signal from parking brake lever switch | Ignition on U=1.6-2.2 V Engine idling and: parking brake lever not engaged U=Ubat parking brake lever engaged U=Ulow. |
- |
| B10 | - | - | - |
| B11 | Signal from back-up (reversing) lamp switch (manual transmission) alternatively gear-shift position sensor (automatic transmission) | Reverse gear: Ubat Other positions: Ulow |
- |
| B12 | 15-Supply (power supply from ignition switch position II) | Ubat | - |
| B13 | Diagnostic lead | U=0-4 V below Ubat. Other values apply if the fault-tracing instrument is connected to the outlet. | - |
| B14 | Signal ground to TMC receiver (FM-receiver in Japan) | Ulow | - |
| B15 | TMC receiver (Japan, FM receiver) | Digital signal | - |
| B16 | TMC receiver (Japan, FM receiver) | Digital signal | - |