CORVETTE C4
1984 - 1996 Diagnose
The Heartbeat of America
Ersatzteile / Parts für die Corvette C4: > c4ersatzteile.htm
Diagnose Schnittstelle der Chevrolet Corvette C4 1984 – 1995 OBD 1 mit ALDL Anschluss bis 1993, ab 1994 - 1995 OBD 2 Stecker mit OBD 1 Protokoll, befindet sich im Fahrerfußraum der C4Ab 1994 bis 1995 wurde aus dem ALDL Anschluss, ein OBD 2 Stecker, das Protokoll ist aber immer noch OBD 1.
Ab 1996 hat die Corvette C4 einen OBD 2 Anschluss und auch das OBD 2 Protokoll.
Zur Systemanalyse steht umfangreiche Hardware und Software zur Verfügung.
Über das elektronische BUS Systeme der C4 sind folgenden Komponenten mit einander verbunden:
ECM / PCM = Motorsteuergerät
CCM / BCM = Bordcomputer (ab 1990)
SIR = Airbagsystem (ab 1990)
ABS System
C68 Klimaanlagen Steuerung (ab 1990)
FX3 elektronisches Fahrwerk (ab 1989)
Luftdrucküberwachungssystem (ab 1989)
Für all dies System Komponenten verfügen wir über Software Applikationen zur Systemanalyse der C4 Corvette.
Diagnose Systeme C4:
GM Tech 1A Scanner mit Master/Applikation
Cartridge
Powertrain 1981 -1999, Body System 1988-1994, Chassis 1986 - 2000, EEPROM Service
1990-1991, ECM 1987-1991, SIR 1990
corvette_c4_ccm.pdf
DiacomPlus (DOS-System mit
LPT Port) 1982 - 1995
TTS Datamaster (Windows-System
nur 32 bit) ggf. Multi boot System mit 32 und 64 bit verwenden.
z.b. Windows XP / 7 / 8.1/10 32bit und Windows 10 64 bit. (Multi Boot)
Import von DiacomPlus Daten
Die ALDL (OBD 1) Schnittstelle der C4 1984 - 1993
A = Ground
B = ECM Diagnostic
C = Ride Control Diagnostic
F = T.C.C. (VIN 8) (Transmission Converter Clutch)
G = CCM Diagnostic (ab 1990)
H = Antilock Brake
J = E&C BUS DATA
K = SIR Diagnostic (ab 1991)
L = SIR Serial Data (ab 1991)
M = Serial DATA (ECM - CCM - EBCM - A/C Programmer)
Infos zum Auslesen der Fehler Codes C4 1990 - 1993: dmcl.pdf
Bei Verdacht auf Manipulationen der
Tacho Laufleistung gibt es ab der C4 1990
die Möglichkeit mit dem Tech 1A Scanner und der entsprechenden Software von GM
dieses aufzudecken.
ECM Fault Code List (LT5; VIN J)
Code Definition
13 Left Oxygen Sensor (Open)
14 Coolant Sensor (High Temp)
15 Coolant Sensor (Low Temp)
16 DIS Fault Line Malfunction
21 TPS (Voltage High)
22 TPS (Voltage Low)
23 IAT Sensor (Temp Low)
24 Vehicle Speed Sensor
25 IAT Sensor (Temp High)
31 Cam Sensor Signal Problem
33 MAP Sensor (Voltage High)
34 MAP Sensor (Voltage Low)
36 DIS Fault Line/Missing or Extra EST Signal
41 Cylinder Select Error
42 EST System Malfunction
43 ESC System Malfunction
44 Left Oxygen Sensor (Lean)
45 Left Oxygen Sensor (Rich)
46 PASS-Key Circuit
51 MEM-CAL Problem
52 Engine Oil Temp Sensor (Low Temp)
53 System Voltage Error
54 Fuel Pump Voltage Low
55 Fuel Lean Monitor
56 Vacuum Sensor Voltage Problem
61 Secondary Port Throttle System Malfunction
62 Engine Oil Temp Sensor High
63 Right Oxygen Sensor Circuit (Open)
64 Right Oxygen Sensor (Lean)
65 Right Oxygen Sensor (Rich)
66 Engine Power Switch Voltage (High or Low)
ECM Fault Code List (L98; VIN 8)
Code Definition
13 Oxygen Sensor (Open)
14 Coolant Sensor (High Temp)
15 Coolant Sensor (Low Temp)
21 TPS (Voltage High)
22 TPS (Voltage Low)
23 IAT Sensor (Temp Low)
24 Vehicle Speed Sensor
25 IAT Sensor (Temp High)
32 EGR System Malfunction
33 MAP Sensor (Voltage High)
34 MAP Sensor (Voltage Low)
41 Cylinder Select Error
42 EST System Malfunction
43 ESC System Malfunction
44 Oxygen Sensor (System Lean)
45 Oxygen Sensor (System Rich)
46 PASS-Key Circuit
51 MEM-CAL Problem
52 Engine Oil Temp Sensor Low
53 System Voltage Problem
54 Fuel Pump Voltage Low
62 Engine Oil Temp Sensor High
CCM Fault Code List
Code Definition
12 On-Board Diagnostics Operational; No Codes
13 DIC Switches Open or Shorted to B+
14 DIC Switches Shorted to Ground
16 Ignition 3 Fuse Circuit Open
21 Horn Relay Coil Shorted to B+ or CCM Internal Open
22 Rear Defogger Relay Coil Shorted to B+ or CCM Internal Open
24 Courtesy Lamp Relay Coil Shorted to B+ or CCM Internal Open
25 Courtesy Lamp Relay Coil Circuit Open or Shorted to Ground
26 LCD Blanking Control Circuit Shorted to B+ or CCM Internal Open
27 LCD Blanking Control Circuit Open or Shorted to Ground
31 LCD Data Circuit Shorted to B+ or CCM Internal Open
32 LCD Data Circuit Open or Shorted to Ground
33 Data Clock Circuit Shorted to B+ or CCM Internal Open
34 Data Clock Circuit Open or Shorted to Ground
35 Data Strobe Circuit Shorted to B+ or CCM Internal Open
36 Data Strobe Circuit Open or Shorted to Ground
37 M Clock Circuit Shorted to B+ or CCM Internal Open
38 M Clock Circuit Open or Shorted to Ground
41 Loss of ECM Serial Data Communication
51 Pass-Key - Invalid Key Detection
52 Pass-Key - Key Detection Circuit Shorted
53 Pass-Key - Key Detection Circuit Open or Shorted to B+
54 Pass-Key - Fuel Enable Failure
61 Pass-Key - Key # 1 Programming Resistance Out of Range
62 Pass-Key - Key # 2 Programming Resistance High
63 Pass-Key - Key # 2 Programming Resistance Low
71 LCD Dimming Output Circuit Shorted to B+ or CCM Internal Open
72 LCD Dimming Output Circuit Open or Shorted to Ground
73 LED Display Dimming Output Circuit Shorted to B+ or CCM Internal Open
74 LED Display Dimming Output Circuit Open or Shorted to Ground
LTPWS Fault Code List
Code Definition
99 Receiver/Control Module Diagnosis
23 Right Tire Rear Low Tire
24 Right Tire Rear Sensor Fault
33 Left Tire Rear Low Tire
34 Left Tire Rear Sensor Fault
43 Left Tire Front Low Tire
44 Left Tire Front Sensor Fault
53 Right Tire Front Low Tire
54 Right Tire Front Sensor Fault
ABS Fault Code List
Code Definition
21 Right Front Wheel Speed Sensor Fault
22 Right Front Toothed Wheel Frequency Error
25 Left Front Wheel Speed Sensor Fault
26 Left Front Toothed Wheel Frequency Error
31 Right Rear Wheel Speed Sensor Fault
32 Right Rear Toothed Wheel Frequency Error
35 Left Rear Wheel Speed Sensor Fault
36 Left Rear Toothed Wheel Frequency Error
41 Right Front Solenoid Valve Fault
45 Left Front Solenoid Valve Fault
55 Rear Wheels Solenoid Valve Fault
61 Pump Motor or Motor Relay Fault
63 Solenoid Valve Relay Fault
71 Electronic Brake Control Module Fault
72 Serial Data Line Fault
75 Lateral Accelerometer Fault (Short ot Open)
76 Lateral Accelerometer Fault (Signal out of Range)
SIR (Airbag) Fault Code List
Code Definition
21 Steering Column Circuit Resistance too High
22 Steering Column Circuit Resistance too Low
23 Steering Column Circuit Voltage too High
23 Steering Column Circuit Voltage too Low
25 Short to Battery in Steering Column Circuit
26 Open in Steering Column Circuit
31 Open 36 VLT to Deployment Loop
32 Grounded 36 VLT to Deployment Loop
33 History Code, Diode B Shorted in Wiring Harness to Arming Sensor
34 Open in Ignition 1 Feed to Deployment Loop
35 Discriminating Sensor Open
41 and / or 42 Deployment Loop Energy Reserve Voltage Fault
51 Accident Detected
52 EEPROM Accident Data Area Full
61 Force Low or "INFL REST" Warning Lamp Circuit Failure
71 Internal DERM Fault
Automatic Air Conditioning Fault Code List
01 + 02 Temperature Door Motor Circuit Fault
03 (Open) + 04 (Short) Outside (Ambient) Air Temperature Sensor Fault
05 (Open) + 06 (Short) In-Vehicle Temperature Sensor Circuit Fault
07 (Open) + 08 (Short) Solar (Sun-Load) Sensor Circuit Fault Open or Shorted
09 Low Freon Detected
10 or --- Uart or "E" and "C" Bus Failure
Diagnostic mode = push and hold the fan "up" arrow and fan "down"
arrow at the same time (5 sec.)
Push "Auto Fan" to show the fault codes
LED flash at 60 times per minute = Fault codes be stored
Reset = Remove Negative Battery Cable for 1 Minute
Code Liste Selective Ride Control FX3:
12 Start of code sequence
13 Left Rear time out
14 Right Front time out
21 Left Front time out
22 Right Rear time out
23 Loss of vehicle speed signal
31 Left Front out of position
32 Right Front out of position
33 Left Rear out of position
34 Right Rear out of position
41 Selective Ride Control Switch short to Voltage
42 Selective Ride Control Switch open cantacts
43 Selective Ride Control Switch open circuit
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