Diagnostic Trouble Codes (DTC) Identification
DIAGNOSTIC TROUBLE CODES (DTC) IDENTIFICATION
| Code | Display on DRB-II | Fault Condition | ||
|---|---|---|---|---|
| 11 | IGN Reference Signal | No distributor reference signal pickup during cranking. | ||
| 12 | Number of Key-Ons Since Last Fault Or Since Faults Were Released | Direct battery input to SBEC was disconnected within last 50-100 ignition key-ons. | ||
| 13 | Map Pneumatic Signal | No difference in MAP sensor signal is detected | ||
| 13 | Map Pneumatic Change | No difference is detected between MAP reading & stored barometric pressure reading. | ||
| 14 | Map Voltage Too Low | MAP sensor input less than minimum acceptable voltage. |
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| 14 | Map Voltage Too High | MAP sensor input more than maximum acceptable voltage. | ||
| 15 | Vehicle Speed Signal | No distance sensor signal detected with road load conditions. | ||
| 17 | Low Engine Temp | Coolant temperature stays below normal operating temperature during vehicle operation. | ||
| 21 | O2 Sensor Signal | No rich or lean signal is detected from O2 sensor input. | ||
| 21 | O2 Sensor Shorted Hi | Oxygen sensor input voltage maintained above normal operating range. | ||
| 22 | Coolant Voltage Low | Coolant temperature sensor input below minimum acceptable voltage. | ||
| 22 | Coolant Voltage High | Coolant temperature sensor input above maximum acceptable voltage. | ||
| 23 | Charge Temp Volt Low | Charge temperature sensor input below minimum acceptable voltage. | ||
| 23 | Charge Temp Volt Hi | Charge temperature sensor input above maximum acceptable voltage. | ||
| 24 | TPS Voltage Low | TPS sensor output less than minimum acceptable voltage. | ||
| 24 | TPS Voltage High | TPS sensor output more than maximum acceptable voltage. | ||
| 25 | AIS Motor Circuits | Shorted condition detected in one or more Auto Idle Speed control circuits. | ||
| 26 | INJ 1 Peak Current | High Resistance Condition Detected In The INJ 1 Injector Bank Circuit. | ||
| 26 | INJ 2 Peak Current | High Resistance Condition Detected In The INJ 2 Injector Bank Circuit. | ||
| 26 | INJ 3 Peak Current | High Resistance Condition Detected In The INJ 3 Injector Bank Circuit. | ||
| 27 | INJ 1 Control Circuit | INJ 1 injector bank output driver stage does not respond correctly to SBEC control signal. | ||
| 27 | INJ 2 Control Circuit | INJ 2 injector bank output driver stage does not respond correctly to SBEC control signal. | ||
| 27 | INJ 3 Control Circuit | INJ 3 injector bank output driver stage does not respond correctly to SBEC control signal. | ||
| 31 | Purge Solenoid Ckt | Open or shorted condition is detected in purge purge solenoid circuit. | ||
| 32 | EGR Solenoid Circuit (California) | Open or shorted condition is detected in EGR solenoid circuit (CA only). | ||
| 32 | EGR System Failure (California) | SBEC did not detect required air/fuel change during diagnostic test (CA only). | ||
| 33 | A/C Clutch Relay Ckt (S Body) | Open or shorted condition detected in A/C clutch relay circuit. |
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| 33 | A/C Clutch Relay Ckt (C & Y Body) | Open or shorted condition detected in A/C clutch relay circuit. |
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| 34 | S/C Servo Solenoids | Open or shorted condition detected in speed control vacuum or vent solenoid circuits. | ||
| 35 | Radiator Fan Relay (S Body) | Open or shorted condition detected in radiator fan relay circuit. | ||
| 35 | Radiator Fan Relay (C & Y Body) | Open or shorted condition detected in radiator fan relay circuit. | ||
| 41 | Alternator Field Ckt | Open or shorted condition detected in alternator field circuit. | ||
| 42 | ASD Relay Circuit | Open or shorted condition detected in ASD relay circuit. | ||
| 42 | Z1 Voltage Sense | No battery voltage sensed when ASD relay is energized. | ||
| 45 | Boost Limit Exceeded | MAP reading above overboost limit detected during engine operation. | ||
| 46 | Battery Voltage High | Battery voltage sense input more than target charging voltage during engine operation. | ||
| 47 | Charging Output Low | Battery voltage sense input less than target charging voltage during engine operation and no significant change in voltage detected during active test of alternator output. | ||
| 51 | Lean F/A Condition | O2 sensor input indicates lean air/fuel ratio during engine operation. | ||
| 52 | Rich F/A Condition | O2 sensor input indicates rich air/fuel ratio during engine operation. | ||
| 53 | Internal Self-Test | SBEC detects internal failure. | ||
| 54 | Sync Pick-Up Signal | No high data rate detected during engine rotation. | ||
| 55 | (1) | Completion of fault code display by check engine light. | ||
| 61 | Baro Read Solenoid | Open or shorted condition detected in baro read solenoid circuit. | ||
| 62 | EMR Miles Not Stored | Unsuccessful attempt to update EMR mileage in SBEC EEPROM (trucks only). | ||
| 63 | EEPROM Write Denied | Unsuccessful attempt to write to an EEPROM location by SBEC. | ||
| N/A | Fault Code Error | DRB-II does not recognize fault identification. | ||
| 64 | VNT Solenoid #1 Ckt | Open or shorted condition detected in VNT solenoid No. 1 circuit. | ||
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