Hard Failures
Hard failures cause CHECK ENGINE light to illuminate and remain on until the malfunction is repaired. If light comes on and remains on (light may flash) during vehicle operation, cause of malfunction must be determined using diagnostic (code) charts. If a sensor fails, SBEC will use a substitute value in its calculations, allowing engine operation in limp-in mode. In this condition, vehicle will run but driveability may be poor.
Note. A start counter (key counter) appears at bottom of fault message on DRB-II to show number of engine starts since fault code last occurred. This helps determine if fault is intermittent. As an example, if DRB-II displays 0 STARTS SINCE ERS, it indicates zero engine starts since fault occurred, and fault code is a hard failure. If start counter (key counter) shows more than zero engine starts since fault last occurred, then fault code is an intermittent failure.
Intermittent Failures
Intermittent failures may cause CHECK ENGINE light to flicker or illuminate and go out after the intermittent fault goes away. However, the corresponding fault code will be retained in SBEC memory.
If related fault does not reoccur within a certain time frame, fault code will be erased from SBEC memory. Intermittent failures can be caused by a defective sensor, connector, or wiring-related problems. See INTERMITTENTS in H - GAS TESTS W/O CODES article.
RETRIEVING FAULT CODES
Note. Manufacturer recommends using DRB-II (Diagnostic Readout Box-II, C-4805) to diagnose the system. CHECK ENGINE light function can be used, but has limited diagnostic usage. Unable to locate this exact procedure. Chuck said it was okay to leave in.
Check Engine Light Method
- Start engine (if possible). Move transmission shift lever through all gear positions, ending in Park. Turn A/C switch on, then off (if equipped).
- Turn engine off. Without starting engine again, turn ignition on, off, on, off, and on. Record 2-digit fault codes as displayed by the flashing CHECK ENGINE light.
- For example, Code 23 is displayed as flash, flash, 4-second pause, flash, flash, flash. After a slightly longer pause, other codes stored are displayed in numerical order.
- Once CHECK ENGINE light begins to flash fault codes, it cannot be stopped. If you lose count, it will be necessary to start over. Code 55 indicates end of fault code display.
- Refer to «FAULT CODES»(ref-10645-S38886792402000111000000) table to translate fault code number to a system fault description (display on DRB-II). Once fault code description is obtained, refer to appropriate NO START TEST 1A (NS-1A) or DRIVEABILITY TEST 1A (DR-1A) trouble shooting chart for additional testing procedures.
- As an example, a 3.0L engine starts and runs, but has a driveability problem, and CHECK ENGINE light indicates a Code 14. Refer to «FAULT CODES»(ref-10645-S38886792402000111000000) table to translate fault code number to a system fault description (display on DRB-II).
- When system fault description (display on DRB-II) is obtained, refer to appropriate DRIVEABILITY TEST 1A (DR-1A) trouble shooting chart, since vehicle has a driveability problem, for more testing procedures. Select fault message and corresponding test from table, and proceed to appropriate trouble shooting chart. Test procedure may vary depending whether fault code is a hard or intermittent failure.
Note. When using trouble shooting charts for diagnosis, DO NOT skip any steps in chart, or incorrect diagnosis may result.
Note. The DRB-II can also be used to perform the following: display the state or values of sensors, inputs/outputs and components, allow various outputs such as valves and hydraulics to be tested, and reset Emission Maintenance Reminder (EMR) functions. See OPERATING MODES and EMISSION MAINTENANCE REMINDER (EMR) in this article.
Scheme 23
Scheme 24
Scheme 25
- Turn ignition off. Attach DRB-II Tester (C-4805) to diagnostic connector. DIAGNOSTIC CONNECTOR LOCATIONS (1) Application Location Caravan, Voyager In Engine Compartment, Near SBEC Dakota In Engine Compartment, On Right Corner Of Firewall (1) (Scheme 23)-5.
- Start engine (if possible). Move transmission shift lever through all positions, ending in Park. Turn A/C switch on, then off (if equipped). Turn engine off. Without starting engine again, turn ignition on. DO NOT touch keypad on DRB-II during power-up sequence, or an error will result. The copyright date and diagnostic program will be displayed briefly.
- If DRB-II screen is blank, or if an error message appears, proceed to «DRB-II PROBLEMS & ERROR MESSAGES»(ref-10645-S18082529082000111000000) in this article. The following are possible error messages that may appear: BAD FRAMING, BAD OP CODE, CARTRIDGE ERROR, COMMAND REJECTED, HIGH BATTERY, KEYPAD TEST FAILURE, LOW BATTERY, NO RESPONSE or RAM TEST FAILURE.
- After a few seconds, display will change to read as follows: DRB-II, 1) VEHICLES TESTED, or 2) HOW TO USE. Press ENTER button immediately. Press the down arrow twice. Display will now read as follows: DRB-II, 2) HOW TO USE, 3) CONFIGURE, and 4) SELECT SYSTEM.
- Select No. 4 (SELECT SYSTEM) to enter the diagnostic system. Display will read as follows: SELECT SYSTEM, 1) ENGINE, and 2) TRANSMISSION. Select No. 1 (ENGINE) to enter the engine system part of the DRB-II program. Display will change to read as follows: 1991 XX, XXXX EMISSIONS, AUTOMATIC TRANS, SBEC XX,#XXXX-A. NOTE: Display may vary slightly depending on engine package being diagnosed.
- After a few seconds, display will change to read as follows: AIR COND, 1) WITH A/C, and 2) WITHOUT A/C. Press ENTER button to change display immediately. Select No. 1 or No. 2 as appropriate for vehicle being tested.
- Display will now read as follows: ENGINE SYSTEM, 1) FUEL/IGNITION, and 2) CHARGING. Select No. 1 (FUEL/IGNITION) to bring up menu of test categories for the fuel/ignition system. Display will change to read as follows: FUEL/IGN MENU, 1) SYSTEM TEST, and 2) READ FAULTS.
- Press the down arrow 3 times to view rest of menu. Display will read as follows: FUEL/IGN MENU, 3) STATE DISPLAY, 4) ACTUATOR TEST, and 5) ADJUSTMENTS. To read fault codes, select No. 2 (READ FAULTS).
- If no fault code exists, display will read as follows: NO FAULTS DETECTED. If fault codes exist, display will show number of faults detected, such as 1 of 3 faults, and fault message. This is the fault counter. Below the fault message, the start counter (key counter) will list number of starts since fault code was set.
- The start counter (key counter) helps to determine if fault is intermittent. As an example, if DRB-II displays 0 STARTS SINCE ERS, this indicates zero engine starts since fault occurred, and fault code is a hard failure. If start counter (key counter) on DRB-II shows more than zero engine starts since fault last occurred, fault code is an intermittent failure.
- If more than one fault code exists, press the down arrow to display next fault code. All fault codes must be read before fault codes can be erased. Once fault codes are obtained, refer to appropriate NO START TEST 1A (NS-1A) or DRIVEABILITY TEST 1A (DR-1A) trouble shooting chart.
Note. When using trouble shooting charts for diagnosis, DO NOT skip any steps in chart, or incorrect diagnosis may result.
CLEARING FAULT CODES
Note. It will be necessary to place DRB-II in the FUEL/IGN MENU to erase fault codes. This menu is obtained when retrieving fault codes. See DRB-II METHOD under RETRIEVING FAULT CODES .
- Once fault codes have been read and DRB-II is in FUEL/IGN MENU, press the down arrow. Display will read as follows: ERASE FAULTS, 1) DON'T ERASE, and 2) ERASE. Press the down arrow.
- Display will ask you if you are sure you want to erase fault codes. Press ENTER button to erase fault codes. DRB-II will display FAULTS ERASED message.
STATE DISPLAY MODE
The SBEC can only recognize high and low states on switch circuits. SBEC cannot tell the difference between switch position versus an open or short circuit, or a defective switch.
If a change is noted, it is assumed entire switch circuit to the SBEC is operating correctly. The following information can be selected from the state display mode: module, sensor, inputs/outputs, monitoring of system, and custom display.
Module Info
When module information is selected from STATE DISPLAY mode, information about the SBEC, such as, engine application, transmission application and identification number can be obtained. Information can be used to verify proper SBEC application.
Sensor
When sensor information is selected from STATE DISPLAY mode, information is provided about engine operation through various sensors and engine controls depending on engine and model application. The following information may be displayed.
- Added Adaptive Fuel
- Adaptive Fuel Factor
- Air Idle Speed (AIS) Motor Position
- Barometric Pressure
- Battery Temperature
- Battery Voltage
- Charging System Goal
- Charge Temperature
- Charge Temperature Sensor Reading
- Coolant Temperature
- Coolant Temperature Sensor Reading
- Distributorless Ignition System (DIS) Status
- Engine Speed
- Fault No. 1 Key-On Info
- Fault No. 2 Key-On Info
- Fault No. 3 Key-On Info
- Knock Sensor Signal
- Manifold Absolute Pressure Sensor Vacuum Reading
- Manifold Absolute Pressure Sensor Voltage Reading
- Minimum Idle Speed
- Minimum Throttle Position Sensor Voltage
- Module Spark Advance
- Overall Knock Retard
- Oxygen Sensor State
- Oxygen Sensor Voltage
- Theft Alarm Status
- Throttle Body Temperature
- Throttle Opening
- Throttle Position Sensor Voltage
- Total Spark Advance
- Speed Control Status
- Speed Control Target
- Vehicle Speed
Inputs/Outputs
When input/output information is selected from state display mode, information is provided about component operation through various lights, relays, solenoids and switches depending on engine and model application. The following information may be displayed.
- A/C Clutch Relay
- A/C Switch
- Air Switching Solenoid
- Auto Shutdown (ASD) Relay
- Brake Switch
- CHECK ENGINE Light
- Closed Throttle Switch
- EGR Solenoid
- Emission Maintenance Reminder (EMR) Light
- Idle Switch
- Lockup Solenoid
- Overdrive Override
- Overdrive Solenoid
- Park Neutral Switch (A/T Models)
- Part Throttle Unlock (PTU) A/T Only
- Purge Control Solenoid
- Radiator Fan Relay
- Shift Indicator Light
- Speed Control On/Off Switch
- Speed Control Resume
- Speed Control Setting
- Speed Control Vacuum Solenoid
- Speed Control Vent Solenoid
Monitors
When monitor information is selected from STATE DISPLAY mode, information is provided about various systems or components as they are monitored depending on engine and model application. The following possible information may be displayed.
- Adaptive Memory
- Engine RPM
- Fuel Control
- Fuel Mileage
- Interrogator
- Knock Retard
- No Start
- Secondary Indicators
- Spark Advance
Custom Display
When custom display is selected, information can be changed to what the technician wants to monitor.
BAD FRAMING
If message is displayed, replace cartridge with later version.
BAD OP CODE
If message is displayed, replace cartridge with later version.
BLANK MESSAGE
- Connect DRB-II to a different vehicle. If message screen is still blank, DRB-II or adapter cable are faulty. Substitute to determine faulty component. If message screen is not blank, DRB-II and adapter cable are functioning properly.
- Inspect diagnostic connector for proper wire placement, damaged terminals or pushed out pins. Repair as necessary. If connector is okay, check resistance between Black or Black/White wire of diagnostic connector and ground using an ohmmeter. (Scheme 23)
- If resistance is less than 10 ohms, repair open circuit in Black or Black/White wire between diagnostic connector and 60-pin connector on the SBEC. See SBEC LOCATIONS table for component location.
| Model | Location |
|---|---|
| Dakota | Right Front Fender, Above Tire |
| All Others | Left Front Corner Of Engine Compartment |
SBEC LOCATIONS
CARTRIDGE ERROR
If message is displayed, replace DRB-II cartridge and proceed with diagnostics.
COMMAND REJECTED
If message is displayed, replace cartridge with later version.
HIGH BATTERY
If message is displayed, connect DRB-II to a different vehicle. If message still exists, DRB-II or adapter cable are faulty. Substitute to determine faulty component. If message is not displayed, DRB-II and adapter cable are functioning properly. Repair charging system.
LOW BATTERY
If message is displayed, connect DRB-II to a different vehicle. If message still exists, DRB-II or adapter cable are faulty. Substitute to determine faulty component. If message is not displayed, DRB-II and adapter cable are functioning properly. Repair charging system.
NO RESPONSE
Note. No response may be caused by one of the following: DRB-II is connected to wrong diagnostic connector, ignition is off, defective adapter cable, cartridge or DRB-II, defective SBEC, connector or wiring.
Scheme 26
- Ensure DRB-II is connected to proper diagnostic connector. (Scheme 24)-5. Ensure ignition is turned on and all wiring connections are secure.
- Turn ignition off. Disconnect DRB-II from diagnostic connector. Disconnect 60-pin connector from SBEC. See SBEC LOCATIONS table for component location. Using ohmmeter, check resistance between Pink wire terminal on diagnostic connector and pin No. 25 (Pink wire) on 60-pin connector. (Scheme 23)and (Scheme 27).
- If resistance is greater than 10 ohms, repair open circuit in Pink wire between diagnostic connector and 60-pin connector. If resistance is not greater than 10 ohms, check resistance between Light Green wire terminal on diagnostic connector and pin No. 45 (Light Green wire) on 60-pin connector.
- If resistance is greater than 10 ohms, repair open circuit in Light Green wire between diagnostic connector and 60-pin connector. If resistance is not greater than 10 ohms, ensure DRB-II and adapter cable are okay.
- If all above are okay and a no-start condition exists, proceed to appropriate no-start test NS-12A. Checking System Power, Engine Controller, MAP Sensor
EMR MILEAGE TRANSFER
- When SBEC is replaced, vehicle mileage from odometer must be copied to the replacement SBEC memory. Transfer of vehicle mileage will enable replacement SBEC to operate EMR light properly.
- It will be necessary to place DRB-II in the FUEL/IGN MENU to reset EMR light. This menu is obtained when retrieving fault codes. See DRB-II METHOD under «RETRIEVING FAULT CODES»(ref-10645-S00398007772000111000000) under SELF-DIAGNOSTIC SYSTEM.
- Once in FUEL/IGN MENU, press the down arrow to select No. 5) ADJUSTMENTS. Display will read as follows: ADJUSTMENTS, 1) ERASE FAULTS, 2) RESET MEMORY, 3) RESET EMR LIGHT, and 4) EMR MEMORY CHECK. Press the down arrow to select No. 4) EMR MEMORY CHECK.
- Display will ask if you are sure you want to check EMR memory. Press ENTER button to continue. Display will read as follows: EMR MEMORY TEST, and WRITE TEST [------]. Display will now ask if instrument panel mileage is between a specified amount.
- Press YES or NO button. If YES button is pressed, EMR memory check is completed. If NO button is pressed, enter mileage shown on the odometer. Press ENTER button to complete mileage transfer.
SUMMARY
If no hard fault codes (or only pass codes) are present, driveability symptoms exist, or intermittent codes exist, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e. ROUGH IDLE, NO START, etc.), or intermittent diagnostic procedures.
Scheme 27
FAULT CODES
| Code | Display On DRB-II | Fault Condition |
|---|---|---|
| 11 | NO REFERENCE SIGNAL DURING CRANKING | No distributor reference signal detected during cranking. |
| 13 (2) | NO CHANGE IN MAP FROM START TO RUN | No difference is recognized between engine MAP reading and barometric pressure reading at start-up |
| OR SLOW CHANGE IN IDLE MAP SIGNAL | No difference in MAP sensor signal is detected. | |
| 14 (2) | MAP VOLTAGE TOO LOW | MAP sensor input less than minimum acceptable voltage. |
| MAP VOLTAGE TOO HIGH | MAP sensor input greater than maximum acceptable voltage. | |
| 15 (3) | NO VEHICLE SPEED SIGNAL | No vehicle speed sensor signal detected. |
| 17 | ENGINE IS COLD TOO LONG | Coolant temperature less than normal operating temperature. |
| 21 (3) | O2 SIGNAL STAYS AT CENTER | No rich or lean signal is detected from O2 sensor input. |
| O2 SIGNAL SHORTED TO VOLTAGE | Oxygen sensor input voltage greater than normal operating range. | |
| 22 (2) | COOLANT SENSOR VOLTAGE TOO LOW | Coolant temperature sensor input is low. |
| COOLANT SENSOR VOLTAGE TOO HIGH | Coolant temperature sensor input is high. | |
| 23 | (4) THROTTLE BODY TEMP VOLTAGE LOW | Throttle body temperature sensor input voltage is low. |
| THROTTLE BODY TEMP VOLTAGE HIGH | Throttle body temperature sensor input voltage is high. | |
| (2) CHARGE TEMPERATURE SENSOR VOLTAGE HIGH OR LOW | Charge temperature sensor input voltage is less than or greater than acceptable voltage. | |
| 24 (2) | TPS VOLTAGE LOW | TPS sensor output voltage is less than acceptable voltage. |
| TPS VOLTAGE HIGH | TPS sensor output is greater than maximum acceptable voltage. | |
| 25 (3) | AUTOMATIC IDLE SPEED MOTOR CIRCUITS | Shorted condition detected in one or more AIS actuator circuits. |
| 26 (2) | INJ 1 PEAK VOLTAGE NOT OBTAINED | High resistance in No. 1 injector circuit. |
| 26 | INJ 2 PEAK VOLTAGE NOT OBTAINED | High resistance in No. 2 injector circuit. |
| 26 | INJ 3 PEAK VOLTAGE NOT OBTAINED | High resistance in No. 3 injector circuit. |
| 27 | INJ 1 CONTROL CIRCUIT | Injector output driver does not respond correctly to control signal. |
| 27 | INJ 2 CONTROL CIRCUIT | Injector output driver does not respond correctly to control signal. |
| 27 | INJ 3 CONTROL CIRCUIT | Injector output driver does not respond correctly to control signal. |
| 31 (3) | PURGE SOLENOID CIRCUIT | Open or shorted condition detected in purge solenoid circuit. |
| 32 (3) | EGR SOLENOID CIRCUIT | Open or shorted condition detected in EGR solenoid circuit. |
| EGR SYSTEM FAILURE | Controller did not detect required air/fuel mixture change during diagnostic test (CA only). | |
| 33 | A/C CLUTCH RELAY CIRCUIT | Open or shorted condition detected in A/C clutch relay circuit. |
| 34 | SPEED CONTROL SOLENOID CIRCUITS | Open or shorted condition detected in speed control vacuum or vent solenoid circuits. |
| 35 | (4) RADIATOR FAN RELAY CIRCUIT | Open or shorted circuit in radiator fan relay circuit. |
| 36 | AIR SWITCHING SOLENOID CIRCUIT | Open or shorted condition detected in air switching solenoid circuit. |
| 37 | (5) TORQUE CONVERTER LOCK-UP SOLENOID CIRCUIT | Open or shorted condition detected in torque converter lockup solenoid circuit (A/T only). |
| 41 (2) | ALTERNATOR FIELD NOT SWITCHING | Alternator field not switching properly. |
| 42 | ASD RELAY CONTROL CIRCUIT | Open or shorted Condition detected in ASD relay circuit. |
| NO ASD RELAY VOLTAGE SENSE AT SBEC | No ASD voltage sensed at controller. | |
| 43 (3) | IGNITION COIL NO. 1 PRIMARY CIRCUIT | Peak primary current not obtained with maximum dwell. |
| 43 | IGNITION COIL NO. 2 PRIMARY CIRCUIT | Peak primary current not obtained with maximum dwell. |
| 43 | IGNITION COIL NO. 3 PRIMARY CIRCUIT | Peak primary current not obtained with maximum dwell. |
| 45 | OVERDRIVE SOLENOID CIRCUIT | Open or shorted condition detected in overdrive solenoid circuit. |
| 46 (2) | CHARGING SYSTEM VOLTAGE TOO HIGH | Charging system voltage is more than acceptable voltage. |
| 47 (2) | CHARGING SYSTEM VOLTAGE TOO LOW | Charging system voltage is less than acceptable voltage. |
| 51 (3) | O2 SIGNAL STAYS BELOW CENTER (LEAN) | O2 sensor signal stays lean. |
| OR ADDITIVE ADAPTIVE MEMORY AT RICH LIMIT | Additive adaptive memory at rich limit. | |
| 52 (3) | O2 SIGNAL STAYS ABOVE CENTER (RICH) | O2 sensor signal stays rich. |
| OR ADDITIVE ADAPTIVE MEMORY AT LEAN LIMIT | Additive adaptive memory at lean limit | |
| 53 | INTERNAL CONTROLLER FAILURE | Internal failure in controller. |
| 54 (2) | NO SYNC PICK-UP SIGNAL | No fuel sync signal detected during engine rotation. |
| 55 | N/A | Completion of fault code display (CHECK ENGINE light). |
| 62 | CONTROLLER FAILURE EMR MILES | ** |
| NOT STORED | Controller failure, EMR miles not stored. | |
| 63 | CONTROLLER FAILURE EEPROM WRITE DENIED | Controller failure, EEPROM write denied. |
| (1) Fault code application will vary with model and engine application. Not all fault codes are used on all models. (2) CHECK ENGINE light will be on. (3) CHECK ENGINE light will be on (California models only). (4) Used on 2.5L (Dakota) (5) On some models, this may be referred to as part throttle unlock solenoid. | ||
| (1) | Fault code application will vary with model and engine application. Not all fault codes are used on all models. |
| (2) | CHECK ENGINE light will be on. |
| (3) | CHECK ENGINE light will be on (California models only). |
| (4) | Used on 2.5L (Dakota) |
| (5) | On some models, this may be referred to as part throttle unlock solenoid. |
FAULT CODES (1)
NS-4A: CHECKING FOR FUEL PRESSURE, TPS & POWER FEED TO INJECTORS
Shadow and Sundance Convertible models are manufactured with either early or late design fuel, ignition and emission systems. Late design vehicles use an epoxy ignition coil, mounted on thermostat housing, and a high pressure fuel system requiring quick-connect fuel fittings. Early design vehicles use an oil-filled ignition coil, mounted on right inner fender, and a low pressure fuel system using hoses and clamps.
Test NS-4A: (1 of 2) Fuel Pressure, TPS & Power Feed To Injectors. Scheme 28
Test NS-4A: (2 of 2) Fuel Pressure, TPS & Power Feed To Injectors. Scheme 29
Test NS-5A Ckt Diag: Wet Plugs, MAP Sensor/Ignition Timing. Scheme 30
Test NS-5A: (1 of 2): Wet Plugs, MAP Sensor/Ignition Timing. Scheme 31
Test NS-5A: (2 of 2): Wet Plugs, MAP Sensor/Ignition Timing. Scheme 32
Test NS-5B: Valve Gear. Scheme 33
Test NS-6A: (1 of 2) Fuel Filter, Fuel Pump, Pressure Regulator & Power To Fuel Pump. Scheme 34
Test NS-6A: (2 of 2) Fuel Filter, Fuel Pump, Pressure Regulator & Power To Fuel Pump. Scheme 35
Test NS-6B: Fuel Filter, Fuel Pump, Pressure Regulator & Power To Fuel Pump. Scheme 36
Test NS-7A Ckt Diag: Flooding Fuel Injector. Scheme 37
Test NS-7A: (1 of 3) Flooding Fuel Injector. Scheme 38
Test NS-7A: (2 of 3) Flooding Fuel Injector. Scheme 39
Test NS-7A: (3 of 3) Flooding Fuel Injector. Scheme 40
Test NS-7B: (1 of 2) Flooding Fuel Injector. Scheme 41
Test NS-7B: (2 of 2) Flooding Fuel Injector. Scheme 42
Test NS-8A: (1 of 2) High Fuel Pressure At Psi. Regulator. Scheme 43
Test NS-8A: (2 of 2) High Fuel Pressure At Psi. Regulator. Scheme 44
Test NS-9A: (1 of 2) Defective Coil or Control Circuitry. Scheme 45
Test NS-9A: (2 of 2) Defective Coil or Control Circuitry. Scheme 46
Test NS-10A: (1 of 2) Injector, Control Circuit & SBEC. Scheme 47
Test NS-10A: (2 of 2) Injector, Control Circuit & SBEC. Scheme 48
Test NS-10B: (1 of 2) Injector, Control Circuit & SBEC. Scheme 49
Test NS-10B: (2 of 2) Injector, Control Circuit & SBEC. Scheme 50
Test NS-11A: DRB-II & System Faults. Scheme 51
Test NS-12A: Ckt Diag. System Power, MAP Sensor & SBEC. Scheme 52
Test NS-12A: (1 of 2) System Power, MAP Sensor & SBEC. Scheme 53
Test NS-12A: (2 of 2) System Power, MAP Sensor & SBEC. Scheme 54
Test NS-12B: Ckt Diag. System Power, MAP Sensor & SBEC. Scheme 55
Test NS-12B: (1 of 2) System Power, MAP Sensor & SBEC. Scheme 56
Test NS-12B: (2 of 2) System Power, MAP Sensor & SBEC. Scheme 57
Test NS-13A: Ckt Diag. Code 11, No Ignition Reference Signal During Cranking. Scheme 58
Test NS-13A: (1 of 3) Code 11, No Ignition Reference Signal During Cranking. Scheme 59
Test NS-13A: (2 of 3) Code 11, No Ignition Reference Signal During Cranking. Scheme 60
Test NS-13A: (3 of 3) Code 11, No Ignition Reference Signal During Cranking. Scheme 61
Test NS-13B: (1 of 2) Code 11, No Ignition Reference Signal During Cranking. Scheme 62
Test NS-13B: (2 of 2) Code 11, No Ignition Reference Signal During Cranking. Scheme 63
Test NS-13C: Code 11, No Ignition Reference Signal During Cranking. Scheme 64
Test NS-14A: (1 of 2) ASD Relay Circuit. Scheme 65
Test NS-14A: (2 of 2) ASD Relay Circuit. Scheme 66
Test NS-15A: (1 of 3) Checking ASD Relay Power Feed To Fuel Pump O2 Sensor & Injector. Scheme 67
Test NS-15A: (2 of 3) Checking ASD Relay Power Feed To Fuel Pump O2 Sensor & Injector. Scheme 68
Test NS-15A: (3 of 3) Checking ASD Relay Power Feed To Fuel Pump O2 Sensor & Injector. Scheme 69
Test NS-16A: Ckt Diag. Idle Speed Motor Operation. Scheme 70
Test NS-16A: Idle Speed Motor Operation. Scheme 71
Test NS-16B: Idle Speed Motor Operation. Scheme 72
Test NS-16C: Idle Speed Motor Operation. Scheme 73
Test NS-16D: Idle Speed Motor Operation. Scheme 74
Test NS-16E: Idle Speed Motor Operation. Scheme 75
DR-1A: CHECKING SYSTEM FOR FAULTS
Note. Battery must be fully charged and at rated capacity before performing any driveability test procedure. If vehicle starts and stalls repeatedly, perform test NS-3A: CHECKING FOR INJECTOR FAULTS, POWER TO ENGINE CONTROLLER, MAP SENSOR & THEFT ALARM STATUS.
- Connect DRB-II to engine diagnostic connector. Read fault messages. If DRB-II displays fault messages, go to DR-1B: DRB-II FAULT MESSAGES. Go to step 9) if DRB-II displays ENGINE COLD TOO LONG. If DRB-II displays INTERNAL CONTROLLER FAILURE, go to step 8). If DRB-II displays NO FAULTS, go to next step.
- If NO FAULTS message appears on DRB-II display, start engine. Allow engine to reach normal operating temperature. Set engine speed manually ( DO NOT use DRB-II to set speed) to 2000 RPM for about 10 seconds. Return engine to idle.
- If vehicle is not equipped with A/C, go to step 5). If vehicle is equipped with A/C, put A/C fan on low speed. Turn A/C on. If engine stalls when A/C is turned on, turn ignition switch off.
- Disconnect engine controller connector. Inspect engine controller connector for corroded or loose terminals. Repair as required. Turn ignition switch on. Put DRB-II in voltmeter mode.
- Probe engine controller connector DB (Dark/Blue) wire at cavity No. 9. If voltage is less than 10 volts, repair DB wire. If voltage is more than 10 volts, replace engine controller. Perform test VER-2: VERIFICATION PROCEDURE 2.
- If vehicle is equipped with A/T, apply brakes and shift through all gears. Return shift lever to Park. Read fault messages displayed on DRB-II.
- If DRB-II still shows NO FAULTS, check TECHNICAL SERVICE BULLETINS for any pertinent information relating to driveability problems. If a TSB exists, perform corrective action. If driveability problem continues after performing TSB procedure or if no TSB information is found, perform test DR-30A: CHECKING SECONDARY IGNITION & TIMING.
- If INTERNAL CONTROLLER FAILURE message appears on DRB-II display, replace engine controller. Perform test VER-2: VERIFICATION PROCEDURE 2.
- If ENGINE COLD TOO LONG message appears on DRB-II display, check engine cooling system. Repair as required. Perform test VER-3: VERIFICATION PROCEDURE 3.
DR-1B: DRB-II FAULT MESSAGES
Using the DRB-II FAULT MESSAGES table, select the fault message and corresponding test. Correct all hard fault messages before proceeding to intermittent fault message.
| DRB Message | Hard Fault (1) | Intermittent Fault (2) |
|---|---|---|
| A/C Clutch Relay Circuit (3) | DR-19A | DR-42A |
| A/C Clutch Relay Circuit (4) | DR-20A | DR-42A |
| A/C Clutch Relay Circuit (5) | DR-21A | DR-42A |
| A/C Clutch Relay Circuit (6) | DR-22A | DR-42A |
| A/C Clutch Relay Circuit (7) | DR-23A | DR-42A |
| Automatic Idle Speed Motor Circuits | DR-15A | DR-44A |
| Controller Failure EEPROM Write Denied | DR-29A | DR-29A |
| Controller Failure EMR Mileage Not Stored | DR-29A | DR-29A |
| Coolant Sensor Voltage Too High | DR-9A | DR-43A |
| Coolant Sensor Voltage Too Low | DR-10A | DR-43A |
| EGR Solenoid Circuit | DR-17A | DR-42A |
| EGR System Failure | DR-18A | DR-42A |
| Injector No. 1 Control Circuit | DR-45A | DR-45A |
| Injector No. 1 Current Peak Not Reached | DR-45A | DR-45A |
| MAP Voltage Too High | DR-5A | DR-43A |
| MAP Voltage Too Low | DR-4A | DR-43A |
| No Change In MAP From Start To Run | DR-3A | DR-43B |
| No Vehicle Speed Signal | DR-6A | DR-6A |
| O2 Signal Shorted To Voltage | DR-8A | DR-43A |
| O2 Signal Stays At Center | DR-7A | DR-43A |
| Purge Solenoid Circuit | DR-16A | DR-42A |
| Radiator Fan Relay Circuit (8) | DR-24A | DR-42A |
| Radiator Fan Relay Circuit (4) | DR-25A | DR-42A |
| Radiator Fan Relay Circuit (5) | DR-26A | DR-42A |
| Radiator Fan Relay Circuit (6) | DR-27A | DR-42A |
| Slow Change In Idle MAP Signal | DR-2A | DR-43B |
| Throttle Body Temperature High | DR-11A | DR-43A |
| Throttle Body Temperature Low | DR-12A | DR-43A |
| Throttle Position Sensor Voltage High | DR-13A | DR-43A |
| Throttle Position Sensor Voltage Low | DR-14A | DR-43A |
| Torque Converter Lock-Up Solenoid | DR-28A | DR-42A |
| (1) Key counter is "0". (2) Key counter is more than "0". (3) AA & AP bodies. (4) AC bodies. (5) AG & AJ bodies. (6) AN bodies. (7) AS bodies. (8) AP & AS bodies. | ||
| (1) | Key counter is "0". |
| (2) | Key counter is more than "0". |
| (3) | AA & AP bodies. |
| (4) | AC bodies. |
| (5) | AG & AJ bodies. |
| (6) | AN bodies. |
| (7) | AS bodies. |
| (8) | AP & AS bodies. |
DRB-II FAULT MESSAGES
Test DR-2A, Code 13: (1 of 2) Slow Change In Idle MAP Signal. Scheme 76
Test DR-2A, Code 13: (2 of 2) Slow Change In Idle MAP Signal. Scheme 77
Test DR-3A, Code 13, No Change In MAP From Start To Run. Scheme 78
Test DR-4A, Code 14: MAP Voltage Too Low. Scheme 79
Test DR-5A, Code 14: (1 of 2) MAP Voltage Too High. Scheme 80
Test DR-5A, Code 14: (2 of 2) MAP Voltage Too High. Scheme 81
Test DR-6A, Ckt Diag. Code 15, No Vehicle Speed Signal. Scheme 82
Test DR-6A, Code 15: (1 of 3) No Vehicle Speed Signal. Scheme 83
Test DR-6A, Code 15: (2 of 3) No Vehicle Speed Signal. Scheme 84
Test DR-6A, Code 15: (3 of 3) No Vehicle Speed Signal. Scheme 85
Test DR-7A, Ckt Diag. Code 21, O2 Signal Stays At Center. Scheme 86
Test DR-7A, Code 21: (1 of 2) O2 Signal Stays At Center. Scheme 87
Test DR-7A, Code 21: (2 of 2) O2 Signal Stays At Center. Scheme 88
Test DR-8A, Code 21: (1 of 2) O2 Signal Shorted To Voltage. Scheme 89
Test DR-8A, Code 21: (2 of 2) O2 Signal Shorted To Voltage. Scheme 90
Test DR-9A, Ckt Diag. Code 22, Coolant Sensor Voltage High. Scheme 91
Test DR-9A, Code 22: (1 of 2) Coolant Sensor Voltage High. Scheme 92
Test DR-9A, Code 22: (2 of 2) Coolant Sensor Voltage High. Scheme 93
Test DR-10A, Code 22: Coolant Sensor Voltage Low. Scheme 94
Test DR-11A, Code 23: Ckt Diag. Throttle Body Temp High. Scheme 95
Test DR-11A, Code 23: (1 of 2) Throttle Body Temp High. Scheme 96
Test DR-11A, Code 23: (2 of 2) Throttle Body Temp High. Scheme 97
Test DR-12A, Code 23: Throttle Body Temp Low. Scheme 98
Test DR-13A, Code 24: Ckt Diag. TPS Voltage High. Scheme 99
Test DR-13A, Code 24: (1 of 2) TPS Voltage High. Scheme 100
Test DR-13A, Code 24: (2 of 2) TPS Voltage High. Scheme 101
Test DR-14A, Code 24: TPS Voltage Low. Scheme 102
Test DR-15A, Code 25: (1 of 4) AIS Motor Circuits. Scheme 103
Test DR-15A, Code 25: (2 of 4) AIS Motor Circuits. Scheme 104
Test DR-15A, Code 25: (3 of 4) AIS Motor Circuits. Scheme 105
Test DR-15A, Code 25: (4 of 4) AIS Motor Circuits. Scheme 106
Test DR-16A, Code 31: Ckt Diag. Purge Solenoid Circuit. Scheme 107
Test DR-16A, Code 31: (1 of 3) Purge Solenoid Circuit. Scheme 108
Test DR-16A, Code 31: (2 of 3) Purge Solenoid Circuit. Scheme 109
Test DR-16A, Code 31: (3 of 3) Purge Solenoid Circuit. Scheme 110
Test DR-17A, Code 32: Ckt Diag. EGR Solenoid Circuit. Scheme 111
Test DR-17A, Code 32: (1 of 3) EGR Solenoid Circuit. Scheme 112
Test DR-17A, Code 32: (2 of 3) EGR Solenoid Circuit. Scheme 113
Test DR-17A, Code 32: (3 of 3) EGR Solenoid Circuit. Scheme 114
Test DR-18A, Code 32: (1 of 5) EGR System Failure. Scheme 115
Test DR-18A, Code 32: (2 of 5) EGR System Failure. Scheme 116
Test DR-18A, Code 32: (3 of 5) EGR System Failure. Scheme 117
Test DR-18A, Code 32: (4 of 5) EGR System Failure. Scheme 118
Test DR-18A, Code 32: (5 of 5) EGR System Failure. Scheme 119
Test DR-18B, Code 32: (1 of 5) EGR System Failure. Scheme 120
Test DR-18B, Code 32: (2 of 5) EGR System Failure. Scheme 121
Test DR-18B, Code 32: (3 of 5) EGR System Failure. Scheme 122
Test DR-18B, Code 32: (4 of 5) EGR System Failure. Scheme 123
Test DR-18B, Code 32: (5 of 5) EGR System Failure. Scheme 124
Test DR-18C, Code 32: EGR System Failure. Scheme 125
Test DR-19A, Code 33: (1 of 4) A/C Clutch Relay Circuit. Scheme 126
Test DR-19A, Code 33: (2 of 4) A/C Clutch Relay Circuit. Scheme 127
Test DR-19A, Code 33: (3 of 4) A/C Clutch Relay Circuit. Scheme 128
Test DR-19A, Code 33: (4 of 4) A/C Clutch Relay Circuit. Scheme 129
Test DR-20A, Code 33: (1 of 2) A/C Clutch Relay Circuit. Scheme 130
Test DR-20A, Code 33: (2 of 2) A/C Clutch Relay Circuit. Scheme 131
Test DR-21A, Code 33: (1 of 2) A/C Clutch Relay Circuit. Scheme 132
Test DR-21A, Code 33: (2 of 2) A/C Clutch Relay Circuit. Scheme 133
Test DR-22A, Code 33: (1 of 2) A/C Clutch Relay Circuit. Scheme 134
Test DR-22A, Code 33: (2 of 2) A/C Clutch Relay Circuit. Scheme 135
Test DR-23A, Code 33: (1 of 3) A/C Clutch Relay Circuit. Scheme 136
Test DR-23A, Code 33: (2 of 3) A/C Clutch Relay Circuit. Scheme 137
Test DR-23A, Code 33: (3 of 3) A/C Clutch Relay Circuit. Scheme 138
Test DR-24A, Code 35: Ckt Diag. Radiator Fan Relay Circuit. Scheme 139
Test DR-24A, Code 35: (1 of 4) Radiator Fan Relay Circuit. Scheme 140
Test DR-24A, Code 35: (2 of 4) Radiator Fan Relay Circuit. Scheme 141
Test DR-24A, Code 35: (3 of 4) Radiator Fan Relay Circuit. Scheme 142
Test DR-24A, Code 35: (4 of 4) Radiator Fan Relay Circuit. Scheme 143
Test DR-25A, Code 35: (1 of 2) Radiator Fan Relay Circuit. Scheme 144
Test DR-25A, Code 35: (2 of 2) Radiator Fan Relay Circuit. Scheme 145
Test DR-26A, Code 35: (1 of 2) Radiator Fan Relay Circuit. Scheme 146
Test DR-26A, Code 35: (2 of 2) Radiator Fan Relay Circuit. Scheme 147
Test DR-27A, Code 35: (1 of 2) Radiator Fan Relay Circuit. Scheme 148
Test DR-27A, Code 35: (2 of 2) Radiator Fan Relay Circuit. Scheme 149
Test DR-28A, Code 37: Ckt Diag. Torque Converter Lock-Up Solenoid. Scheme 150
Test DR-28A, Code 37: (1 of 3) Torque Converter Lock-Up Solenoid. Scheme 151
Test DR-28A, Code 37: (2 of 3) Torque Converter Lock-Up Solenoid. Scheme 152
Test DR-28A, Code 37: (3 of 3) Torque Converter Lock-Up Solenoid. Scheme 153
Test DR-29A, Code 63: (1 of 2) SBEC Failure EMR Mileage Not Stored & EEPROM Write Denied. Scheme 154
Test DR-29A, Code 63: (2 of 2) SBEC Failure EMR Mileage Not Stored & EEPROM Write Denied. Scheme 155
Test DR-30A: (1 of 2) Secondary Ignition & Timing. Scheme 156
Test DR-30A: (2 of 2) Secondary Ignition & Timing. Scheme 157
Test DR-31A: (1 of 2) Fuel Pressure. Scheme 158
Test DR-31A: (2 of 2) Fuel Pressure. Scheme 159
Test DR-31B: (1 of 2) Fuel Pressure. Scheme 160
Test DR-31B: (2 of 2) Fuel Pressure. Scheme 161
Test DR-32A: (1 of 2) Coolant & TPS Sensor Calibration. Scheme 162
Test DR-32A: (2 of 2) Coolant & TPS Sensor Calibration. Scheme 163
Test DR-33A: (1 of 2) MAP Sensor Calibration. Scheme 164
Test DR-33A: (2 of 2) MAP Sensor Calibration. Scheme 165
Test DR-34A: Oxygen Sensor Switching. Scheme 166
Test DR-34B: (1 of 2) Oxygen Sensor Switching. Scheme 167
Test DR-34B: (2 of 2) Oxygen Sensor Switching. Scheme 168
Test DR-35A: Ckt Diag. Idle Speed Motor Operation. Scheme 169
Test DR-35A: (1 of 2) Idle Speed Motor Operation. Scheme 170
Test DR-35A: (2 of 2) Idle Speed Motor Operation. Scheme 171
Test DR-35B: Idle Speed Motor Operation. Scheme 172
Test DR-35C: Idle Speed Motor Operation. Scheme 173
Test DR-35D: Idle Speed Motor Operation. Scheme 174
Test DR-35E: Idle Speed Motor Operation. Scheme 175
Test DR-36A: Ckt Diag. Park/Neutral Switch Operation. Scheme 176
Test DR-36A: (1 of 2) Park/Neutral Switch Operation. Scheme 177
Test DR-36A: (2 of 2) Park/Neutral Switch Operation. Scheme 178
Test DR-37A: Ckt Diag. SBEC Grounds & Power Circuits. Scheme 179
Test DR-37A: (1 of 2) SBEC Grounds & Power Circuits. Scheme 180
Test DR-37A: (2 of 2) SBEC Grounds & Power Circuits. Scheme 181
Test DR-38A: (1 of 2) EGR Operation Federal Emissions. Scheme 182
Test DR-38A: (2 of 2) EGR Operation Federal Emissions. Scheme 183
Test DR-38B: EGR Operation Federal Emissions. Scheme 184
Test DR-38C: (1 of 5) EGR Operation Federal Emissions. Scheme 185
Test DR-38C: (2 of 5) EGR Operation Federal Emissions. Scheme 186
Test DR-38C: (3 of 5) EGR Operation Federal Emissions. Scheme 187
Test DR-38C: (4 of 5) EGR Operation Federal Emissions. Scheme 188
Test DR-38C: (5 of 5) EGR Operation Federal Emissions. Scheme 189
Test DR-39A: Ckt Diag. Engine Vacuum. Scheme 190
Test DR-40A: (1 of 2) Engine Vacuum. Scheme 191
Test DR-40A: (2 of 2) Engine Vacuum. Scheme 192
VER-1: VERIFICATION PROCEDURE 1
- Inspect vehicle to ensure all components are connected. Reassemble and reconnect components as necessary. Attempt to start engine. If engine does not start, return to test NS-1A: CHECKING FOR IGNITION SPARK & POWER FEED TO COIL.
- If engine starts and engine controller has been changed, go to next step. If engine starts and engine controller has not been changed, connect DRB-II to engine diagnostic connector and erase faults. Repair is now complete.
- If vehicle is equipped with factory theft alarm system, start engine about 20 times to activate theft alarm system. If vehicle is an AS or AN body, write EMR mileage into the new engine controller. Repair is now complete.
VER-2: VERIFICATION PROCEDURE 2
- If test VER-3: VERIFICATION PROCEDURE 3 has been performed previously, perform test VER-3 again. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary.
- If another fault exists that has not been corrected, return to DR-1B: DRB-II FAULT MESSAGES and follow path specified by other fault. If engine controller has been replaced and vehicle is equipped with factory theft alarm system, start engine about 20 times to activate theft alarm system. If vehicle is an AS or AN body, write EMR mileage into new engine controller.
- Connect DRB-II to engine diagnostic connector and erase faults. Ensure no other faults are present. To ensure no other faults are present, start engine. Allow engine to reach normal operating temperature. Increase engine speed to 2000 RPM for about 10 seconds. Return engine to idle.
- If vehicle is equipped with A/T, apply brakes and cycle through all transmission gear positions. Place gear selector in Park. If vehicle is equipped with A/C, turn A/C on. Set blower speed to LOW.
- Turn engine off. Start engine. Allow engine to idle for about 2 minutes. Turn engine off. Using DRB-II, check for fault messages. If NO FAULT message appears on DRB-II display, test is complete.
- If repaired fault resets or another fault sets, check TECHNICAL SERVICE BULLETINS for any pertinent information relating to problem. If a TSB exists, perform corrective action. If another fault sets, return to DR-1B: DRB-II FAULT MESSAGES.
VER-3: VERIFICATION PROCEDURE 3
- Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If another fault is present that has not been corrected, return to DR-1B: DRB-II FAULT MESSAGES and follow path specified by other fault.
- If engine controller has been changed and vehicle is equipped with factory theft alarm system, start engine about 20 times to activate theft alarm system. If vehicle is an AS or AN body, write EMR mileage into new engine controller.
- Connect DRB-II to engine diagnostic connector. Erase fault messages. Disconnect DRB-II. Ensure no other fault messages are present. To ensure no other fault messages are present, start engine. If vehicle is equipped with A/C, turn A/C on. Set blower speed to LOW.
- Drive vehicle for about 5 minutes. During this time, attain a speed above 40 MPH or more. Ensure transmission shifts through all gears. Upon completion of road test, turn engine off.
- Start engine. Allow engine to idle for about 2 minutes. Turn engine off. Connect DRB-II to engine diagnostic connector. Using DRB-II, check for fault messages. If no fault messages are present, test is complete.
- If repaired fault message resets or another fault message sets, check TECHNICAL SERVICE BULLETINS for any pertinent information relating to driveability problems. If a TSB exists, perform corrective action. If another fault sets, return to DR-1B: DRB-II FAULT MESSAGES.