What are the trouble codes for a corvette?

31 LCD data circuit shorted to battery or CCM internal open 33 Data clock circuit shorted to battery or CCM internal open circuit 35 Data strobe circuit shorted to battery or CCM internal open circuit 36 Data strobe circuit open or shorted to ground 37 M clock circuit shorted to battery or CCM internal open circuit

What does SYS stand for on a corvette?

Have you noticed “SYS” intermittently showing up in your 1990-1996 Corvette’s speedometer display? This means there is a trouble code stored in one of the on-board control modules. When the 1990 Corvette debuted, GM introduced ECM (Engine Control Module) and CCM (Central Control Module) trouble codes.

What kind of trouble does a 1993 Corvette have?

Any loose strands could short another terminal. 1990-1993 Corvettes use the first generation ALDL connector. It houses a fuel pump override lead that has battery voltage. This connector position can harm other ALDL circuits if battery voltage is inadvertently jumped to a control circuit.

How to clear a CCM code on a corvette?

Clearing the CCM codes can be done after the automatic sequence of codes has occurred with the following instructions: Press the TRIP RESET button until “1.0” is displayed in the module number area. Then press the TRIP/ODO button until “1.7” is displayed in the module number area. Once there, press and hold the ENG/MET button until “—“is displayed.

Where do I find the CCM code on my Corvette?

The CCM will display all module codes (sequentially) in the speedometer read-out area.

Where are the ABS codes on a corvette?

Module 1 CCM (central control module) is first, followed by module 4 ECM (engine control module) and finishing with module 9 ABS/ASR EBTCM (anti-lock brake system/acceleration slip regulation/electronic brake traction control module) codes. 1990-1991 Corvette CCMs will not display any ABS/ASR or EBTCM codes.

What is the C4 trouble code for a corvette?

Code #21: Throttle Position Sensor High. Code #22: Throttle Position Sensor Low. Code #23: Manifold Air Temperature Circuit High. Code #24: Vehicle Speed Sensor. Code #25: Manifold Air Temperature Circuit Low.

Where are the ECM and CCM codes on a corvette?

1990-1993 Corvette ECM and CCM codes can be accessed placing a jumper wire in ALDL positions A and G. Position A is in the top right corner; position G is the first position at the lower left of the ALDL. 1994-1996 Corvette ECM, CCM and ASR/EBTCM codes are accessed placing the jumper wire in ALDL connector positions 4 and 12.

Where is the serial number on a 1988 Corvette?

For all 1988 Corvettes, the Vehicle Identification Number was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield. The Check Digit is used to calculate the characters in the serial number and gives it a single digit code that can be used to verify the serial number is legitimate.

What are the diagnostic codes for a corvette?

72 LCD dimming output circuit open or shorted to ground 73 LED display dimming output circuit shorted to battery or CCM internal open circuit 74 LED display dimming output circuit open or shorted to ground 02 Dimming potentiometer (A/D) counts (see note A) 04 Rear defogger timer (seconds) (see note B)

Where is the ECM code on a 1994 Corvette?

1994-1996 Corvette ECM, CCM and ASR/EBTCM codes are accessed placing the jumper wire in ALDL connector positions 4 and 12. GM used numerals in place of alphas on all 1994 and up Corvettes at the ALDL. The ALDL numerals start with 1 in the upper left hand position and 9 in the lower left position.

What do the numbers on a C4 Corvette mean?

These codes are a combination of 3 alphanumeric characters and refer to a specific options or modifications to a vehicle. If any C4 Corvette codes have been left out from this list, please comment the three digit code below and a Corvette Salvage representative will add it to the list. 103 – Arctic White Leather Interior (1993 to 1996)

Which is the least changed model of corvette?

The 1971 Chevy Corvette remains one of the least changed models in design (when compared to the preceding model year) in the Corvette’s entire production history.

What is the status code for a corvette?

1100 – Preliminary Order: As soon as your order is placed with GM, the status code is automatically set to this number. 2000 – Accepted by GM: At this status, GM has accepted your order.

What is the engine ID number on a Chevy LT1?

Decode the LT1 engine ID number. In order, the code identifies assembly plant, month, day, and engine suffix code. When cross-referenced against a Chevrolet listing, the suffix code gives exact engine specifics.

When did the Corvette LT1 engine come out?

The original LT1 must come from a 1970 to 1972 Corvette or Camaro Z28, however, not all Corvettes and Camaros have LT1 engines. The LT1 term was later used by Chevrolet during the 1990s as the Generation II LT1. Be sure of the year vehicle if the engine is still installed.

Why does my car have code 44 lean exhaust?

The code 44 for lean exhaust is most likely caused by one or more of the following: 1.) O2 sensor wire – Sensor pigtail may be mispositioned and contacting the exhaust manifold. 2.) Check for an intermittent ground wire between connector and sensor. 3.) Poor ECM to engine block ground.

When to set code 44 on lean exhaust?

Code 44 is set when the O2 sensor signal voltage remains below .3 volts for 50 seconds or more and the system is operating in “closed loop”. Diagnostic aides: The code 44 for lean exhaust is most likely caused by one or more of the following: 1.) O2 sensor wire – Sensor pigtail may be mispositioned and contacting the exhaust manifold. 2.)

What is the C4 code on a 1990 Corvette?

Code #52 (1990-91 Corvette Only): Engine Oil Temperature Sensor Low. Code #53: System Over Voltage. Code #54: Fuel Pump Circuit Low Voltage. Code #55: Defective ECM. Code #62: Engine Oil Temperature Sensor Circuit High.

Why does my L-98 Corvette engine not start?

When you start an L-98 engine Corvette, a series of events take place that causes the engine to run. Knowing the sequence will help you troubleshoot no start conditions. When you first turn the key to the “on” position, the fuel pump will run for 2 seconds pressurizing the fuel rails.

How to recover a C4 Corvette diagnostic code?

C4 Corvette Diagnostic Code Recovery Techniques In the ‘In Depth’ section of this site, the ECM (Engine Control Module) codes are listed and the technique for recovering those codes on the 1984 through 1993 model Corvette is explained.

How does the C4 Corvette start and stop?

Brainiac Fact for C4 Corvette Start Sequence! The ECM also pulls the fuel pump relay which makes the contacts and parallel’s it electrically with the oil pressure switch. This way if the fuel pump relay fails you can still normally get the car to run.

What causes a Corvette engine to not start?

This flow chart might help. When you start an L-98 engine Corvette, a series of events take place that causes the engine to run. Knowing the sequence will help you troubleshoot no start conditions. When you first turn the key to the “on” position, the fuel pump will run for 2 seconds pressurizing the fuel rails.

What happens when you start a C4 Corvette?

When starting an L-98 Corvette engine, a sequence of events take place that precedes the engine running. Knowing these sequences will help you troubleshoot no start issues with your C4 Corvette. C4 Corvette Start Sequence begins when you first turn the key to the “on” position, the fuel pump will run for 2 seconds pressurizing the fuel rails.

What are the trouble codes for a corvette?