Типы применяемых диагностических разъемов на
Chevrolet
Тип ALDL - OBD I
Тип разъема ALDL - 12-и контактный прямоугольный диагностический разъем
Марки и года (ориентировочно): все модели 1988-1994 гг. Типичное расположение: в салоне под торпедой со стороны водителя
| Контакт | Назначение | |
|---|---|---|
A | МАССА | |
B | Диагностический терминал (соединить контакт В с контактом А перемычкой, включить зажигание, лампа "MIL" будет выдовать серии вспышек длинная вспышка(десятки) короткие вспышки (единицы) между кодом ошибки большая пауза. Сначало будет показан код 12 (вспышка короткая пауза и две быстрые вспышки), это означает начало диагностики, а затем коды ошибок. Каждая ошибка показываеться 3-и раза подряд, а затем идет следующая ошибка и так по кругу пока стоит перемычка. | |
C |
| |
D |
| |
E |
| |
F |
| |
G | Топливный насос | |
M | К-линия диагностики | |
H | +12В (отсутствует на некоторых моделях) |
Коды самодиагностики Chevrolet 1992-1994
| Flash code | Fault location | Probable cause |
| 12 | Start of diagnosis | No engine speed (RPM) signal received |
| 13 | Oxygen sensor (02S)/heated oxygen sensor (H02S) | Wiring open circuit, 02S/H02S, ECM |
| 14 | Engine coolant temperature (ECT) sensor -voltage high/low | Wiring, ECT sensor, ECM |
| 15 | Engine coolant temperature (ECT) sensor -voltage high | Wiring open circuit, ECT sensor, ECM |
| 16 | Ignition control module (ICM) -2X reference circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| 17 | Camshaft position (CMP) sensor -circuit malfunction | Wiring, CMP sensor, mechanical fault, ECM |
| 18 | Camshaft position (CMP) signal/fuel control signal | Wiring open circuit/short circuit to ground, CKP sensor, CMP sensor, ICM, ECM |
| 19 | Crankshaft position (CKP) sensor, 7X signal -circuit malfunction | Wiring, CKP sensor, ICM, ECM |
| 21 | Throttle position (TP) sensor -voltage high/ low | Wiring, TP sensor, ECM |
| 22 | Throttle position (TP) sensor -voltage low | Wiring open circuit/short circuit to ground, TP sensor, ECM |
| 23 | Intake air temperature (IAT) sensor -voltage high/low | Wiring, IAT sensor, ECM |
| 24 | Vehicle speed sensor (VSS) -no signal | Wiring, VSS, ECM |
| 25 | Intake air temperature (IAT) sensor -voltage low | Wiring short circuit to ground, IAT sensor, ECM |
| 26 | Engine control module (ECM), quad driver! output driver -circuit malfunction | Wiring, ECM controlled components, ECM rn |
| 27 | Engine control module (ECM), quad driver! output driver -circuit malfunction | Wiring, ECM controlled components, ECM rn |
| 28 (1994) | Engine control module (ECM), quad driver! output driver -circuit malfunction | Wiring, ECM controlled components, ECM rn |
| 28 (1992-1993) | Transmission range (TR) switch -malfunction | Wiring, TR switch, ECM |
| 31 | Transmission range (TR) switch -malfunction | Wiring, TR switch, ECM |
| 32 | Exhaust gas recirculation (EGR) solenoid | Wiring, poor connections, EGR valve, ECM |
| 33 | Manifold absolute pressure (MAP) sensor -voltage high!low | Wiring, hose blocked/leaking, MAP sensor, ECM |
| 34 | Manifold absolute pressure (MAP) sensor -voltage low | Wiring open circuit/short circuit to ground, MAP sensor, ECM |
| 35 | Idle air control (lAC) valve | Wiring, lAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM |
| 36 | Crankshaft position (CKP) sensor, at crankshaft pulley -24X signal circuit malfunction | Wiring, CKP sensor, ECM |
| 37 | Brake pedal position (BPP) switch for torque converter clutch (TCC) | Wiring, incorrectly adjusted, BPP switch, ECM |
| 38 | Brake pedal position (BPP) switch for torque converter clutch (TCC) | Wiring open circuit/short circuit to ground/ short circuit to positive, BPP switch incorrectly adjusted, BPP switch, ECM |
| 39 | Clutch pedal position (CPP) switch | Wiring, incorrectly adjusted, CPP switch, ECM |
| 41 | Ignition control module (ICM) -1X circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| 42 | Ignition control, bypass/timing signal -circuit malfunction | Wiring, poor connections, ICM, ECM |
| 43 | Knock sensor (KS)/knock control module -circuit malfunction | Wiring, KS, knock control module, ECM |
| 44 | Oxygen sensor (02S)/heated oxygen sensor (H02S) -mixture lean | Wiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, 02S/H02S, ECM |
| 45 | Oxygen sensor (02S)/heated oxygen sensor (H02S) -mixture rich | Wiring open circuit, fuel pressure high, injector(s) leaking, 02S/H02S, EVAP purge valve, TP sensor, EGR system, ECM |
| 46 | Immobilizer system, code -malfunction | Incorrect key, ECM |
| 51 | Engine control module (ECM), PROM -malfunction | Poor connections, incorrect programming, ECM |
| 52 | Engine control module (ECM) -malfunction | ECM |
| 53 | System voltage -high | Alternator |
| 54 | Fuel pump circuit -voltage low | Wiring open circuit/short circuit to ground, fuel pump relay, engine oil pressure warning lamp/fuel pump switch |
| 55 | Engine control module (ECM) -malfunction | ECM |
| 55 (1994) | Engine control module (ECM), fuel lean monitor | Fuel filter/lines blocked, fuel contamination |
| 56 | Engine control module (ECM), quad driver/ output driver -circuit malfunction | Wiring, ECM controlled components, ECM IE |
| 58 | Transmission fluid temperature (TFT) sensor -voltage low | Wiring short circuit to ground, TFT sensor, ECM |
| 59 | Transmission fluid temperature (TFT) sensor -voltage high | Wiring open circuit, TFT sensor, ECM |
| 61 | Oxygen sensor (02S) -malfunction | 02S |
| 62 | Transmission gear switch signal circuit | Wiring open circuit/short circuit to ground, 2nd gear switch, 3rd gear switch, ECM |
| 63 | Cruise control servo -servo position sensor low | Hoses leaking, cruise control servo |
| 65 | Injectors -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, injectors, ECM |
| 66 | A/C refrigerant pressure sensor -voltage low | Wiring open circuit/short circuit to ground, A/C refrigerant pressure sensor, ECM |
| 67 | Cruise control switch -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, cruise control switch, ECM |
| 68 | Cruise control servo -servo position sensor high | Hoses blocked/leaking, brake pedal vacuum valve, cruise control servo |
| 69 | A/C refrigerant pressure switch, engine coolant blower motors | Wiring open circuit, A/C refrigerant pressure switch, ECM |
| 70 | A/C refrigerant pressure sensor -voltage high | Wiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM |
| 75 | Exhaust gas recirculation (EGR) solenoid 1 -circuit malfunction | Wiring, EGR valve, ECM |
| 76 | Exhaust gas recirculation (EGR) solenoid 2 -circuit malfunction | Wiring, EGR valve, ECM |
| 77 | Exhaust gas recirculation (EGR) solenoid 3 -circuit malfunction | Wiring, EGR valve, ECM |
| 81 | Brake pedal position (BPP) switch for torque converter clutch (TCC) -circuit malfunction | Wiring, BPP switch, ECM |
| 82 | Crankshaft position (CKP) sensor, in cylinder block -3X signal circuit malfunction | Wiring open circuit/short circuit to ground, CKP sensor, ICM |
| 85 | Engine control module (ECM), PROM -malfunction | Poor connections, incorrect programming, ECM |
| 86 | Engine control module (ECM) -analogue/ digital converter | A/C refrigerant pressure sensor/KS/ECT sensor/fuel pump monitor circuit short circuit to battery voltage |
| 87 | Engine control module (ECM), EEPROM -malfunction | Poor connections, incorrect programming, ECM |
| 90 | Torque converter clutch (TCC) -stuck ON | Wiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM |
| 96 | Engine control module (ECM) -ignition supply voltage low | Wiring open circuit, alternator, ECM |
| 98 | Engine control module (ECM) – incorrectly coded | ECM incorrectly coded, ECM |
| 99 | Cruise control system – engine management has operated in limited power mode | Throttle cable sticking, brake vacuum release valve, cruise control actuator |
