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GENERAL INFORMATION
(i.e. relays and solenoids) and shorted circuits (i.e.
sensor pull-ups, drivers and ground circuits). These
faults are difficult to detect when a double fault has
occurred and only one DTC has set.
If the DRBIII displays faults for multiple com-
ponents (i.e. VSS, ECT, Batt Temp, etc.), identify
and check the shared circuits for possible problems
before continuing (i.e. sensor grounds or 5-volt
supply circuits). Refer to the appropriate wiring
diagrams to identify shared circuits.
A/C CLUTCH RELAY CIRCUIT OPEN CIRCUIT
A/C CLUTCH RELAY CIRCUIT SHORT CIR-
CUIT
A/C PRESSURE SENSOR CIRCUIT SIGNAL
VOLTAGE TOO HIGH
A/C PRESSURE SENSOR CIRCUIT SIGNAL
VOLTAGE TOO LOW
A/C PRESSURE SENSOR CIRCUIT SUPPLY
VOLTAGE TOO HIGH OR LOW
ACC PEDAL POSITION SENSOR 1 CKT PLAU-
SIBILITY WITH BRAKE SWITCH
ACC PEDAL POSITION SENSOR 1 CKT SIG-
NAL VOLTAGE TOO HIGH
ACC PEDAL POSITION SENSOR 1 CKT SUP-
PLY VOLTAGE TOO HIGH OR LOW
ACC PEDAL POSITION SENSOR 2 CKT PO-
TENTIOMETER PLAUSIBILITY 1/2
ACC PEDAL POSITION SENSOR 2 CKT SIG-
NAL VOLTAGE TOO HIGH
ACC PEDAL POSITION SENSOR 2 CKT SUP-
PLY VOLTAGE TOO HIGH OR LOW
A/D CONVERTER ERROR 5 VOLT SUPPLY
FAILURE
A/D CONVERTER ERROR GROUND TO APP
FAILURE
A/D CONVERTER ERROR RAM TEST FAIL-
URE
AFTER RUN SHUT OFF ERROR-INJ. POWER-
STAGE
AFTER RUN SHUT OFF ERROR-ZERO QUAN-
TITY
AMBIENT AIR TEMPERATURE CIRCUIT SIG-
NAL VOLTAGE TOO HIGH
AMBIENT AIR TEMPERATURE CIRCUIT SIG-
NAL VOLTAGE TOO LOW
ASD RELAY CONTROL CIRCUIT SHUTS OFF
TOO EARLY
ASD RELAY CONTROL CIRCUIT SHUTS OFF
TOO LATE
BAROMETRIC PRESSURE CIRCUIT SIGNAL
VOLTAGE TOO HIGH
BAROMETRIC PRESSURE CIRCUIT SIGNAL
VOLTAGE TOO LOW
BATTERY SENSE LINE 1 VOLTAGE TOO
HIGH
BATTERY SENSE LINE 1 VOLTAGE TOO LOW
BATTERY SENSE LINE 2 VOLTAGE TOO
HIGH
BATTERY SENSE LINE 2 VOLTAGE TOO LOW
BATTERY TEMP SENSOR CIRCUIT SIGNAL
VOLTAGE TOO HIGH
BATTERY TEMP SENSOR CIRCUIT SIGNAL
VOLTAGE TOO LOW
BOOST PRESSURE SENSOR PLAUSIBILITY
BOOST PRESSURE SENSOR SIGNAL VOLT-
AGE TOO HIGH
BOOST PRESSURE SENSOR SIGNAL VOLT-
AGE TOO LOW
BOOST PRESSURE SENSOR SUPPLY VOLT-
AGE TOO HIGH OR LOW
BRAKE SWITCH SIGNAL CIRCUITS PLAUSI-
BILITY AFTER INIT.
BRAKE SWITCH SIGNAL CIRCUITS PLAUSI-
BILITY WITH REDUNDANT CONTACT
CALCULATED INJECTOR VOLTAGE TOO
HIGH
CAN BUS MESSAGE MISSING FROM TCM
CAN BUS MUTE
CAN BUS OPEN
CAPACITOR VOLTAGE 1 VOLTAGE TOO HIGH
CAPACITOR VOLTAGE 1 VOLTAGE TOO LOW
CKP POSITION SENSOR CIRCUIT DYNAMIC
PLAUSIBILITY
CMP POSITION SENSOR CIRCUIT CMP/CKP
SYNC FAILURE
CMP POSITION SENSOR CIRCUIT DYNAMIC
PLAUSIBILITY
CMP POSITION SENSOR CIRCUIT SIGNAL
FREQUENCY TOO HIGH
CMP POSITION SENSOR CIRCUIT STATIC
PLAUSIBILITY
CYLINDER 1-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 1-INJECTOR
DROP
CYLINDER 1-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 1-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 2-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 2-INJECTOR
DROP
CYLINDER 2-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 2-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 3-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 3-INJECTOR
DROP
CYLINDER 3-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
4
CIRCUIT
LOAD
CIRCUIT
LOAD
CIRCUIT
LOAD
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