Test readings, control module connections: Remember:
- Note the test conditions and use your common sense when judging the test results.
- The specified readings are with the ignition in position ON unless otherwise stated.
- First check that the control module has a power supply and is grounded.
- Then check all 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 in working order.
- If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components that ought to be checked more thoroughly.
- The test readings given apply to a calibrated Fluke 88/97.
- The test readings %(+) and ms(+) show the signal's pulse ratio and pulse duration. A test instrument capable of measuring pulse ratio and pulse duration must be used. The sign indicates a positive trigger pulse, TRIG+.
Pins without comments have no pin connection. (LP: LOGIC PROBE P = select pulse; p = perceptible pulses)
PINOUT REFERENCE
| Pin | Cable color | Component/function | In/Out | Test conditions | Across | Test reading | See |
|---|---|---|---|---|---|---|---|
| 1 | GN/BK | Main relay | In | B+ to 1 | <0.5 V | MAIN RELAY | |
| 2 | BN/BU | Oxygen sensor 2, preheating | Out | Idling Coolant temperature above 50°C | 2-25 | 0.3 V | CLOSED LOOP |
| 3 | Not connected | ||||||
| 4 | BU/WH | Relay, A/C compressor | Out | 700 RPM A/C ON |
4-25 | <0.5 V | A/C relay |
| 5 | OG | Cruise control B | In | Mode ON/OFF | 5-25 | 0 V B+ |
CRUISE CONTROL |
| 6 | GN/RD | Combustion, Bank 2 | In | 700 RPM | 6-25 | 15-90 Hz (LP LO HIp) |
IGNITION DISCHARGE MODULES |
| 7 | BU/RD | Trigger 1 | Out | 700 RPM | 7-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 8 | BU/GN | Trigger 4 | Out | 700 RPM | 8-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 9 | GN/YE | Pedal position sensor 2 | In | Pedal released Pedal fully depressed |
Use diagnostic tool | 0.355-1.010 V 3.945-4.600 V |
PEDAL POSITION SENSOR |
| 10 | YE | Throttle position sensor 2 | In | Throttle closed Throttle fully open |
10-70 | 3.910-4.935 V 0.025-1.070 V |
THROTTLE CONTROL |
| 11 | BN/OG | Manifold absolute pressure sensor | In | 11-22 | 2.1 V at 100 kPa | MANIFOLD ABSOLUTE PRESSURE SENSOR | |
| 12 | GY | In | <700 mg/c Engine temperature -9° C and +30°C |
4 - 25 | <12 V | SECONDARY AIR INJECTION PUMP RELAY . | |
| 13 | Not connected | ||||||
| 14 | Not connected | ||||||
| 15 | WH/BK | Intake air temperature | In | 15-22 | Approx. 2.4 V at 20°C | INTAKE AIR TEMPERATURE SENSOR | |
| 16 | Not connected | ||||||
| 17 | YE | Crankshaft position sensor | In | 700 RPM Starter motor cranking |
17-18 | 5-15 V~ 680 Hz LP HI LO >2.0 V~ |
CRANKSHAFT POSITION SENSOR |
| 18 | BK | Crankshaft position sensor | In | 700 RPM Starter motor cranking |
17-18 | 5-10 V~ 680 Hz LP HI LO >2.0 V~ |
CRANKSHAFT POSITION SENSOR |
| 19 | WH | P-bus - | In/Out | 19-25 | 2-3 V (LP PHI LO) |
BUS COMMUNICATION | |
| 20 | BK/RD | Injector 6 | Out | 700 RPM | 20-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 21 | PK/WH | Injector 5 | Out | 700 RPM | 21-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 22 | BK | Sensor ground | Out | 22-25 | < 0.1 V | GROUND | |
| 23 | RD | +30 | In | B+ to 23 | < 0.5 | CONTROL MODULE POWER SUPPLY | |
| 24 | BU/RD | Throttle motor | Out | 48-24 | 600 Hz LP HI LO |
THROTTLE CONTROL | |
| 25 | BK | Power ground | In | 25- B- | <0.1 V | GROUND | |
| 26 | BU | Main relay | Out | 10 s after ignition OFF | 26-25 | <0.5 V B+ |
MAIN RELAY |
| 27 | BN/RD | EVAP canister purge valve | Out | 700 RPM, engine hot and valve active | 27-25 | 16 Hz (LP HI LOp) |
PURGING |
| 28 | Not connected | ||||||
| 29 | GN/RD | Pedal switch, brake/clutch | In | Automatic, position D Brake or clutch pedal depressed |
29-25 | B+ 0 V |
PEDAL POSITION SENSOR |
| 30 | VT | Cruise control C | In | Mode ON/OFF | 30-25 | 0 V B+ |
CRUISE CONTROL |
| 31 | RD/WH | Trigger 5 | Out | 700 RPM | 31-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 32 | BU/YE | Trigger 6 | Out | 700 RPM | 32-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 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 |
THROTTLE CONTROL |
| 34 | RD | Oxygen sensor 1 | In | 700 RPM, hot engine, closed loop active | 34-58 | 0-1 V | CLOSED LOOP |
| 35 | YE/RD | Charge air absolute pressure sensor | In | 35-70 | 2.1 V (100 kPa) | CHARGE AIR ABSOLUTE PRESSURE SENSOR | |
| 36 | WH | Relay, limp-home solenoid | Out | 36-25 | B+ | ||
| 37 | BN/WH | EVAP canister shut-off valve | Out | Activate ON | 37-25 | B+ <0.5 V |
PURGING |
| 38 | OG/WH | Knock signal, Bank 1 | In | 38-25 | 2.5 V | KNOCK CONTROL | |
| 39 | WH/GN | Temperature sensor, coolant | In | 39-22 | 1.0 V (90°C) | TEMPERATURE SENSOR, COOLANT | |
| 40 | Not connected | ||||||
| 41 | Not connected | ||||||
| 42 | Not connected | ||||||
| 43 | BU/RD | +15 | In | Ignition OFF | 43-25 | B+ < 0.5 V |
CONTROL MODULE POWER SUPPLY |
| 44 | BK/WH | Injector 2 | Out | 700 RPM | 44-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 45 | BU/GN | Injector 1 | Out | 700 RPM | 45-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 46 | WH/BK | 5 V | Out | 46-70 | 5 V | 5V supply | |
| 47 | BK | Power ground | In | 47-B- | <0.1 V | GROUND | |
| 48 | GY/RD | Throttle motor + | Out | 48-24 | 600 Hz LP HI LO |
THROTTLE CONTROL | |
| 49 | VT/WH | Oxygen sensor, preheating | Out | 700 RPM | 49-25 | 0.3 V | CLOSED LOOP |
| 50 | GN | Fuel pump relay | Out | Starter motor cranking | 50-25 | B+ <0.5 V |
FUEL PUMP RELAY |
| 51 | Not connected | ||||||
| 52 | WH | Cruise control A | In | Mode ON/OFF | 52-25 | 0 V B+ |
CRUISE CONTROL |
| 53 | YE/BU | Combustion, Bank 1 | In | 700 RPM | 53-25 | 15-90 Hz (LP LO HIp) |
IGNITION DISCHARGE MODULES |
| 54 | YE/BK | Trigger 2 | Out | 700 RPM | 54-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 55 | RD/BU | Trigger 3 | Out | 700 RPM | 55-25 | 6 Hz 14 ms (-) (LP HI LOp) |
IGNITION DISCHARGE MODULES |
| 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 |
PEDAL POSITION SENSOR |
| 57 | GN | Oxygen sensor 2 | In | Idling, warm engine, closed loop active | 57-58 | 0-1 V | CLOSED LOOP |
| 58 | BK | Reference ground, oxygen sensor | In | 58-25 | <0.1 V | GROUND | |
| 59 | OG/WH | Tank pressure sensor, EVAP | In | Filler cap released and fuel level below sensor | 59-22 | 2.5 V | PURGING |
| 60 | Not connected | ||||||
| 61 | Not connected | ||||||
| 62 | GN/BK | Knock signal, Bank 2 | In | 62-25 | 2.5 V | KNOCK CONTROL | |
| 63 | GN/GY | Brake lights | In | Brake pedal depressed | 63-25 | 0 V B+ |
CRUISE CONTROL |
| 64 | GY/RD | Vehicle speed | In | Rotate right front wheel 1/2 turn/s | 64-25 | 15 Hz 50 % (LP HIp LOp) |
Speed, wire from ABS |
| 65 | PK/WH | Mass air flow sensor | In | 700 RPM Engine warm A/C OFF electrical equipment turned off |
65-25 | Approx. 2.1 kHz | MASS AIR FLOW SENSOR |
| 66 | GN | P-bus+ | In/Out | 66-25 | 2-3 V (LP PHI LO) |
BUS COMMUNICATION | |
| 67 | RD/YE | Injector 3 | Out | 700 RPM | 67-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 68 | GN/GY | Injector 4 | Out | 700 RPM | 68-25 | 6 Hz (LP HI LOp) |
INJECTORS |
| 69 | GY/RD | 5 V | Out | 69-22 | 5 V | 5V supply | |
| 70 | GN/RD | Sensor ground | Out | 70-25 | <0.1 V | GROUND |