Signal specification ECC
Connector A; A1-30
All values listed below should be measured between the respective terminal in column 1 ( Terminal ) and termnal A23 (ground) unless stated otherwise in column 4 ( Other ).
Scheme 143
The ECC control module connector # A1-30 corresponds to the breakout box terminals # 1-30.
Note. The blower fan should be on, or the engine running at idle, in order for the control module to activate the damper motors when the selectors are turned.
Note. It is important to check ground terminals before taking readings. Connect breakout box according to Connection of breakout box ECC before readings are taken.
| U= | DC voltage in volts (V) | F= | Frequency in Hertz (Hz) |
|---|---|---|---|
| Ulow= | Voltage approx 0 V | %duty= | Duty cycle (pulse ratio) as a percentage (%) |
| Ubat= | Battery voltage |
| Terminal. | Signal type | Ignition on/engine idling | Other |
|---|---|---|---|
| A1 | |||
| A2 | |||
| A3 | Signal, request to air conditioning (A/C) compressor (to engine control module (ECM)). | A/C REQUEST: 1-2 V below Ubat. No request: U less than 1.5 V. | |
| A4 | |||
| A5 | Signal, activation power unit. | U=11.3-13.3 V | |
| A6 | |||
| A7 | Power supply, position sensor damper motors. | U=4.8-5.2 V. | |
| A8 | Control signal+, left temperature damper motor. | Motor's +winding activated: U=2-4 V below Ubat. Motor +winding not activated: U<1 V. | Motor activated when passenger compartment temperature selector turned to colder temperature selection. |
| A9 | Control signal-, left temperature damper motor. | Motor's -winding activated: U=2-4 V below Ubat. Motor +winding not activated: U<1 V. | Motor activated when passenger compartment temperature selector turned to higher temperature selection. |
| A10 | Control signal +, right temperature damper motor. | Motor's + winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when passenger compartment temperature selector turned. |
| A11 | Control signal -, right temperature damper motor. | Motor's - winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when passenger compartment temperature selector turned. |
| A12 | Signal, position sensor on left temperature damper motor. | U=0-5 V. | Voltage is varied when passenger compartment temperature selector is turned. |
| A13 | Signal, position sensor on right temperature damper motor. | U=0-5 V. | Voltage is varied when passenger compartment temperature selector is turned. |
| A14 | Diagnostic signal from power unit. | U=0.22-2.5 V. | Voltage increases with blower fan speed. |
| A15 | Signal, blower fan speed (to power unit). | Fapprox.100 Hz. Increased duty cycle (+trigg) gives increased blower fan speed. | Signal is a pulsed signal with fixed frequency and variable duty cycle. |
| A16 | Signal, panel lighting (from rheostat). | Fapprox.125 Hz. Increased duty cycle (+trigg) gives brighter lighting level. | Signal is a pulsed signal with fixed frequency and variable duty cycle. |
| A17 | |||
| A18 | |||
| A19 | Signal, outside temperature sensor. | U=0-5 V. 20°Capprox.2,5 V | Voltage decreases with rise in temperature. |
| A20 | Signal, engine block heater (from engine block heater timer). | Timer ON: Ubat Timer OFF: Ulow | |
| A21 | |||
| A22 | Signal ground sensor (measured against battery negative terminal). | Ulow | |
| A23 | Power ground (measured against battery negative terminal). | Ulow | |
| A24 | Control signal+, damper motor air distribution. | Motor's - winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when air distribution selector turned to different positions. If activated, depends on position and in which direction the selector is turned. |
| A25 | Control signal +, damper motor air distribution. | Motor's - winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when air distribution selector turned to different positions. If activated, depends on position and in which direction the selector is turned. |
| A26 | Control signal +, damper motor recirculation. | Motor's + winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when recirculation engaged. |
| A27 | Control signal -, damper motor recirculation. | Motor's + winding activated: U=2-4 V below Ubat. Motor + winding not activated: U<1 V. | Motor activated when recirculation disengaged. |
| A28 | Signal, damper motor position sensor air distribution. | U=0-5 V depending on sensor position. | Voltage reduces when the air distribution selector is turned from the DEF position to the VENT position clockwise. Note: In AUT position the control module itself modifies the position and so the value. |
| A29 | Signal, damper motor position sensor recirculation. | U=0-5 V. | Voltage increases when recirculation is engaged. |
| A30 | Diagnostic lead. | U=0-4 V below Ubat. | Other values apply if the fault-tracing instrument is connected to the data link connector (DLC). |
Connector B; B1-10
All values listed below should be measured between the respective terminal in column 1 ( Terminal ) and termnal A23 (ground) unless stated otherwise in column 4 ( Other ).
Scheme 144
The ECC control module connector # B1-10 corresponds to the breakout box terminals # 47-56.
Note. It is important to check ground terminals before taking readings. Connect breakout box according to Connection of breakout box ECC before readings are taken.
| U= | DC voltage in volts (V) | F= | Frequency in Hertz (Hz) |
|---|---|---|---|
| Ulow= | Voltage approx 0 V | ||
| Ubat= | Battery voltage |
| Terminal. | Signal type | Ignition on/engine idling | Other |
|---|---|---|---|
| B1 | Signal, vehicle speed (from combined instrument panel). | Frequency increases with increase in speed. | Pulsed signal with fixed duty cycle and variable frequency. |
| B2 | Signal, engine coolant temperature (ECT) (from engine control module (ECM)) | Cold engine (+20°C): fapprox.40Hz. Engine at normal operating temperature (+90°C): fapprox.22Hz. | Pulsed signal with fixed duty cycle and variable frequency. |
| B3 | Signal, generator (GEN) D+. | Generator (GEN) charging: Ubat Generator (GEN) not charging ignition on: Uapprox.0,5 V. | |
| B4 | |||
| B5 | Power supply, X supply (from ignition switch). | Ubat | |
| B6 | Signal, passenger compartment temperature sensor | 20°Capprox.2,5 V | Voltage decreases with rise in temperature. |
| B7 | |||
| B8 | Control signal fan motor passenger compartment temperature sensor. | Activated: U=0-2 V below Ubat. Not activated: U=Ulow. | |
| B9 | Signal, sun sensor. | Current signal | Increases with sun intensity. |
| B10 | Signal ground, sensor. | Ulow |
Signal specification, Parking heater 091 B/D
General
All values given below are between the respective terminal in column 1 and terminal #2 (power ground) unless otherwise stated in brackets after the entry.
Scheme 145
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) |
|---|---|---|---|
| U bat = | Battery voltage (V) | F = | Frequency in Hertz (Hz) |
| U low = | Voltage approximately 0 V | % duty = | Duty cycle (pulse ratio) as a percentage (%) |
| T = | Time in milliseconds (ms) |
| Terminal | Signal type | Ignition on | Heater started | Other |
|---|---|---|---|---|
| #1 | Timer control signal | Timer active: U>7 V Timer not active: U<2.75 V | ||
| #2 | Power ground (Measured to the battery negative terminal) Also the common ground for the flame sensor and engine coolant temperature sensor | U low | ||
| #3 | 30-supply (Power supply from battery) | U bat | ||
| #4 | Coolant temperature sensor signal | Uapprox.U low | +20°C: Uapprox.3.5 V | The voltage decreases with increasing temperature |
| #5 | Glow plug signal | Uapprox.U low | Glow plug off: U=U low Glow plugs on: Frequencyapprox. 1 Hz | |
| #6 | ||||
| #7 | ||||
| #8 | ||||
| #9 | Diagnostic lead | U=1-2 V | If the fault tracing instrument is connected, other values apply | |
| #10 | Signal, flame sensor | Uapprox.U low | Flame not lit: U> 4 V Flame lit: U<1.5 V | |
| #11 | Control signal for the blower fan | Relay not activated: Uapprox.12V Relay activated: U less than 2.5 V | ||
| #12 | ||||
| #13 | Fuel pump control signal | U bat | Fuel pump off: f=0 Hz Fuel pump on: f= maximum 7 Hz | The frequency increases with pump speed |
| #14 | Water pump control signal | Water pump off and power supply off: U low Water pump off and power supply on: U bat Water pump on and power supply on: U low | ||
| #15 | Power supply, combustion fan, fuel pump (FP) and water pump | Power supply off: U low Power supply on: U bat | ||
| #16 | Combustion fan control signal | Combustion fan off and power supply off: U low Combustion fan off and power supply on: U bat Fan on: Pulse ratio (% duty) > 0% | The pulse ratio (% duty) increases with fan speed. | |
ECC electrical specifications
| Temperatur °C | Resistans kohm |
|---|---|
| 40 | 197.7-216.7 |
| 30 | 114.2-123.7 |
| 20 | 68.4-73.2 |
| 10 | 42.3-44.9 |
| 0 | 26.9-28.3 |
| 10 | 17.6-18.3 |
| 20 | 11.8-12.2 |
| 25 | 9.7-10.0 |
| 30 | 8.05-8.31 |
| 40 | 5.59-5.81 |
| 50 | 3.96-4.14 |
| 60 | 2.86-3.01 |
Outside temperature sensor, passenger compartment temperature sensor, resistance
Scheme 146
Scheme 147
Signal specification Additional heater 912-D/B
General
All values given below are between the respective terminal in column 1 and terminal #3 (power ground) unless otherwise stated in brackets after the table entry. Control module terminals #1-#16 correspond to #1-#16 on the breakout box.
Note. It is important to connect the breakout box and check ground terminals before taking readings.
| U= | DC voltage in volts (V) | U AC = | AC voltage in volts (V) |
|---|---|---|---|
| U bat = | Battery voltage (V) | F= | Frequency in Hertz (Hz) |
| U low = | Voltage approximately 0 V | % duty= | Duty cycle (pulse ratio) as a percentage (%) |
| T= | Time in milliseconds (ms) |
| Terminal | Signal type | Ignition on | Engine idling | Remarks |
|---|---|---|---|---|
| #1 | Glow plug signal | Glow plug off: U=U low Glow plug on: Pulse ratio (% duty) 0% | Pulse ratio (% duty) increases with glow plug intensity. | |
| #2 | Control signal passenger compartment blower fan (when installed as accessory) | No accessory installation: Uapprox.0V Relay installed Relay not activated: Uapprox.12V Relay activated: U less than 2.5 V | ||
| #3 | Power ground Measured to battery negative terminal(-) | U low | ||
| #4 | Signal ground, outside temperature sensor, Coolant temperature sensor and flame sensor | U low | ||
| #5 | Signal from generator (GEN) | U<2.75 V | U>7 V | |
| #6 | Diagnostic lead, K-link | Uapprox.8.1 V | Uapprox.9.8 V | If the fault tracing-instrument is connected the other values apply |
| #7 | Outside temperature sensor signal | +20°C: Uapprox.0.5 V | Voltage increases with decreasing temperature | |
| #8 | Flame sensor signal | Flame not lit: Uapprox.5 V Flame lit: U<1.5 V | ||
| #9 | 30-supply (Power supply from battery) | U bat | ||
| #10 | Combustion fan control signal | Combustion fan off and power supply off: U low Combustion fan off and power supply on: U bat Fan on: Pulse ratio (% duty) 0% | The pulse ratio (% duty) increases with fan speed. | |
| #11 | Combustion fan, fuel pump and water pump power supply | Power supply off: U low Power supply on: U bat | ||
| #12 | Water pump control signal | Water pump off and power supply off: U low Water pump off and power supply on: U bat Water pump on and power supply on: U low | ||
| #13 | Fuel pump control signal | Fuel pump off: f=0 Hz Fuel pump on: f>0 Hz | Frequency increases with pump speed | |
| #14 | Timer control signal | Timer active: U>7 V Heater start after rest: U<2.75 V Remarks: 2.75 V | ||
| #15 | 15-supply (power supply from ignition switch) | U bat | U bat | |
| #16 | Coolant temperature sensor signal | +20°C: Uapprox.3.5 V | Voltage decreases with increasing temperature | |