Test Readings, Control Module Connections: Remember
- Note the test readings, use common sense when assessing the results of the tests.
- The specified values are with the ignition in the ON position unless otherwise stated.
- First, make sure the control module is supplied with power and grounded.
- Then, check all the sensor inputs and signals from other systems.
- Finally, check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.
- If any of the test readings are incorrect, use the wiring diagram to determine which lead, connector or component should be checked further.
- The specified test values apply for a Fluke 88/97.
- The test readings % (+) and ms (+) signify the pulse ratio and pulse length of the signal respectively. A test instrument capable of measuring pulse ratio and pulse width must be used. The sign indicates a positive trigger pulse, TRIG+.
Pins without further comments have no connection. (LP: LOGIC PROBE P = select pulse; p = visible pulses).
CONTROL MODULE CONNECTIONS PINOUTS REFERENCE
| Pin | Cable color | Component/function | In/Out | Test conditions | Across | Test reading |
|---|---|---|---|---|---|---|
| 1 | GN/BK | Main relay, 87 | In | B+ to 1 | <0.5 V | |
| 2 | BN/BU | Oxygen sensor 2, pre - heating | Out | Idling Coolant temperature above 50°C | 2-25 | approx. 0.3 V |
| 3 | Not connected | |||||
| 4 | BU/WH | Relay. A/C compressor | Out | Idle A/C on | 4-25 | <0.5 V |
| 5 | OG | Cruise B | In | Position ON/OFF | 5-25 | 0 V B+ |
| 6 | RD/WH | Combustion cyl. 3+4 | In | Idle | 6-25 | 15-90 Hz (LP LO HIp) |
| 7 | RD/BU | Trigger 1 | Out | Idle | 7-25 | 7 Hz 14 ms (-) (LP HI LOp) |
| 8 | VT/WH | Trigger 4 | Out | Idle | 8-25 | 7 Hz 14 ms (-) (LP HI LOp) |
| 9 | BK/RD | Pedal position sensor 2 | In | Pedal released Pedal fully depressed |
Use diagnostic tool | 0.355 - 1.010 V 3.945- 4.600 V |
| 10 | YE | Throttle position sensor 2 | In | Throttle closed Throttle fully open |
10-70 | 3.910- 4.935 V 0.025- 1.070 V |
| 11 | BN/OG | Manifold absolute pressure sensor | In | 11-22 | 2.1 V at 100 kPa | |
| 12 | Not connected | |||||
| 13 | BU/BN | Charge air control valve | Out | 13-25 | 32 Hz 2 % (-) 0.5 ms (-) (LP HI LOp) |
|
| 14 | Not connected | |||||
| 15 | WH/BK | Intake air temperature | In | 15-22 | Approx. 2.4 V at 20°C | |
| 16 | Not connected | |||||
| 17 | YE | Crankshaft position sensor | In | Idle Starter motor cranking |
17-18 | 5-15 V~ approx. 800 Hz LP HI LO 2.0V~ |
| 18 | BK | Crankshaft position sensor | In | Idle Starter motor cranking |
17-18 | 5-10 V~ approx. 800 Hz LP HI LO 2.0V~ |
| 19 | WH | P-bus - | In/Out | 19-25 | 2-3 V (LP PHI LO) |
|
| 20 | Not connected | |||||
| 21 | Not connected | |||||
| 22 | BK | Sensor ground | Out | 22-25 | < 0.1 V | |
| 23 | RD | +30 | In | B+ to 23 | < 0.5 | |
| 24 | BU/RD | Throttle motor - | Out | 48-24 | 600 Hz LP HI LO |
|
| 25 | BK | Power ground | In | 25- B- | < 0.1 V | |
| 26 | BU | Main relay | Out | 10 s after ignition off | 26-25 | <0.5 V B+ |
| 27 | BN/RD | EVAP canister purge valve | Out | Idling, warm engine and valve active | 27-25 | 16 Hz (LP HI LOp) |
| 28 | Not connected | |||||
| 29 | GN/RD | Pedal switch, brake/clutch | In | Automatic position D Brake or clutch pedal depressed |
29-25 | B+ 0 V |
| 30 | VT | Cruise C | In | Position ON/OFF | 30-25 | 0 V B+ |
| 31 | Not connected | |||||
| 32 | Not connected | |||||
| 33 | GY/RD | Throttle position sensor 1 | In | Throttle closed Throttle fully open |
33-70 | 0.065-1.090 V 3.930-4.775 V |
| 34 | RD | Oxygen sensor 1 | In | Idling, warm engine, closed loop active | 34-58 | 0-1 V |
| 35 | YE/RD | Charge air absolute pressure sensor | In | 35-70 | 2.1 V (100 kPa) | |
| 36 | WH | Relay, limp-home solenoid | Out | 36-25 | B+ | |
| 37 | BN/WH | EVAP shut-off valve (certain markets only) | Out | Activate ON | 37-25 | B+ <0.5 V |
| 38 | OG/WH | Knock signal | In | 38-25 | 2.5 V | |
| 39 | WH/GN | Coolant temperature sensor | In | 39-22 | 1.0 V (90° C) | |
| 40 | Not connected | |||||
| 41 | Not connected | |||||
| 42 | Not connected | |||||
| 43 | BU/RD | +15 | In | Ignition OFF | 43-25 | B+ <0.5 V |
| 44 | BK/WH | Injector 2 | Out | Idle | 44-25 | 7 Hz 2.5-4.5 ms (-) (LP HI LOp) |
| 45 | BU/GN | Injector 1 | Out | Idle | 45-25 | 7 Hz 2.5-4.5 ms (-) (LP HI LOp) |
| 46 | WH/BK | 5 V | Out | 46-70 | 5 V | |
| 47 | BK | Power ground | In | 47-B- | < 0.1 V | |
| 48 | GY/RD | Throttle motor + | Out | 48-24 | 600 Hz LP HI LO |
|
| 49 | VT/WH | Oxygen sensor 1, pre - heating | Out | Idle | 49-25 | approx. 0.3 V |
| 50 | GN | Fuel pump relay | Out | Starter motor cranking | 50-25 | B+ <0.5 V |
| 51 | BU/WH | Control valve, bypass | Out | Rev up engine and release accelerator pedal Acceleration under load |
51-25 | B+ <0.5 V |
| 52 | WH | Cruise A | In | Position ON/OFF | 52-25 | 0 V B+ |
| 53 | OG | Combustion cyl. 1+2 | In | Idle | 53-25 | 15-90 Hz (LP LO HIp) |
| 54 | BU/RD | Trigger 2 | Out | Idle | 54-25 | 7 Hz 14 ms (-) (LP HI LOp) |
| 55 | YE/BU | Trigger 3 | Out | Idle | 55-25 | 7 Hz 14 ms (-) (LP HI LOp) |
| 56 | WH/GN | Pedal position sensor 1 | In | Pedal released Pedal fully depressed |
56-70 | 3.990- 4.645 V 0.400-1.055 V |
| 57 | GN | Oxygen sensor 2 | In | Idling, warm engine, closed loop active | 57-58 | 0-1 V |
| 58 | BK | Reference ground, oxygen sensor | In | 58-25 | < 0.1 V | |
| 59 | OG/WH | EVAP tank pressure valve (certain markets only) | In | Filler cap released and fuel level below sensor | 59-22 | 2.5 V |
| 60 | Not connected | |||||
| 61 | Not connected | |||||
| 62 | BK | Not connected | 62-B- | < 0.1 V | ||
| 63 | GN/GY | Brake lights (not cars with ESP) | In | Brake pedal depressed | 63-25 | 0 V B+ |
| 64 | GY/RD | Vehicle speed (not cars with ESP) | In | Rotate front left wheel 1/2 rps | 64-25 | 15 Hz 50 % (LP HIp LOp) |
| 65 | PK/WH | Mass air flow sensor | In | Idling, Engine warm, A/C off, electric consumers turned off |
65-25 | Approx. 2.1 kHz |
| 66 | GN | P-bus + | In/Out | 66-25 | 2-3 V (LP PHI LO) |
|
| 67 | RD/YE | Injector 3 | Out | Idle | 67-25 | 7 Hz 2.5-4.5 ms (-) (LP HI LOp) |
| 68 | GN/GY | Injector 4 | Out | Idle | 68-25 | 7 Hz 2.5-4.5 ms (-) (LP HI LOp) |
| 69 | GY/RD | 5 V | Out | 69-22 | 5 V | |
| 70 | GN/RD | Sensor ground | Out | 70-25 | < 0.1 V |