Mechanics

C1263 CODE

2002 Chevrolet Corvette • 83,500 miles

I own a 2002 corvette z06. I sometimes get a C1263 code which disengages by ABS and activer handling. I know this code means that there is a "RF inlet solenoid malfunction". What does this mean and how can this be fixed? I already had the EBCM replaced in the last year from getting a C1214 code. Thank you.
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Ggvenom
January 24, 2012.




ANTI-LOCK BRAKE SYSTEM -2002 Chevrolet Corvette Z06
Page 1 of 2
DTC C1261: LF INLET VALVE SOLENOID MALFUNCTION; C1262: LF OUTLET VALVE
SOLENOID MALFUNCTION; C1263: RF INLET VALVE SOLENOID MALFUNCTION; C1264: RF OUTLET VALVE SOLENOID MALFUNCTION; C1265: LR INLET VALVE
SOLENOID MALFUNCTION; C1266: LR OUTLET VALVE SOLENOID MALFUNCTION; C1267: RR INLET VALVE SOLENOID MALFUNCTION; C1268: RR OUTLET VALVE
SOLENOID MALFUNCTION; C1271: LF TCS MASTER CYLINDER ISOLATION VALVE
MALFUNCTION; C1272: LF TCS PRIME VALVE MALFUNCTION; C1273: RF TCS MASTER CYLINDER ISOLATION VALVE MALFUNCTION; C1274: RF TCS PRIME VALVE
MALFUNCTION

Circuit Description

The system relay is energized when the ignition is ON. The system relay supplies voltage to the valve solenoids and the pump motor. This voltage is referred to as the system voltage. The EBCM
microprocessor activates the valve solenoids by grounding the control circuit.
Conditions For Running The DTC

? The system voltage is greater than 8 volts. ? The ignition voltage is greater than 9 volts.
Conditions For Setting The DTC

The commanded state of the driver and the actual state of the control circuit do not match for 0.03 seconds.
Action Taken When The DTC Sets

If equipped, the following actions occur: ? The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle. ? The DRP does not function optimally.
? The ABS indicator turns ON.
? The Traction Control and Active Handling indicator turns ON. ? The DIC displays the following messages: ? Service ABS
? Service Traction System ? Service Active Handling
Conditions For Clearing The DTC

? The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
? The condition for the DTC is no longer present (the DTC is not current) and you used the On-

1/24/2012
ANTI-LOCK BRAKE SYSTEM -2002 Chevrolet Corvette Z06
Page 2 of 2
Board Diagnostics Clear DTC function.
? The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids

The solenoid valve circuit is internal to the EBCM. The solenoid valve circuit is not diagnosable external to the EBCM. The DTC sets when there is a malfunction in the solenoid circuit internal to the
EBCM.
Test Description

The number below refers to the step number on the diagnostic table.
2. Determines whether the DTC is current.
Fig. 29: DTC C1261-C1274
Courtesy of GENERAL MOTORS CORP.

1/24/2012

ANTI-LOCK BRAKE SYSTEM -2002 Chevrolet Corvette Z06
Page 1 of 2
DTC C1214: SYSTEM RELAY CONTACT OR COIL CIRCUIT OPEN

Circuit Description

The system relay is energized when the ignition is ON. The system relay supplies voltage to the solenoid valves and the pump motor. This voltage is referred to as the system voltage.
The EBCM controls each solenoid valve by grounding the solenoid.
The EBCM controls the pump motor by grounding the control circuit. The pump serves 2 purposes: ? Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events.
? Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events.
Conditions For Running The DTC

? The ignition voltage is greater than 10.5 volts. ? The system relay is commanded ON.
Conditions For Setting The DTC

The system voltage is less than 8 volts for 0.23 seconds.
Action Taken When The DTC Sets

If equipped, the following actions occur: ? The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle. ? The DRP does not function optimally.
? The ABS indicator turns ON.
? The Traction Control and Active Handling indicator turns ON. ? The DIC displays the following messages: ? Service ABS
? Service Traction System ? Service Active Handling
Conditions For Clearing The DTC

? The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
? The condition for the DTC is no longer present (the DTC is not current) and you used the On- Board Diagnostics Clear DTC function.

1/24/2012
ANTI-LOCK BRAKE SYSTEM -2002 Chevrolet Corvette Z06
Page 2 of 2
? The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids

The system relay is integral to the EBCM. The relay is not serviceable.
Test Description

Tips Click a link to view tip
Question: DTC 1214
Tech1
The number below refers to the step number on the diagnostic table.
2. Determines whether the DTC is current.
Fig. 19: DTC C1214
Courtesy of GENERAL MOTORS CORP.

1/24/2012

Rivermikerat
Jan 25, 2012.


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