2.2l Turbo Tests W/codes Dodge Daytona I

DESCRIPTION

Note. Information on this system is also covered in the FUEL SYSTEMS section. Additional diagnostic information that relates strictly to the fuel portion of this system can be found in the FUEL INJECTION SYSTEM - MULTI-POINT article in this section.

The computerized engine control systems used on 2.2L and 2.5L fuel injected engines control the fuel system, ignition system and emission control system for proper engine operation. Multi-Point Fuel Injection (MPFI) is used.

In order to control these systems, the computer monitors several engine and vehicle operating conditions. The engine conditions monitored include: manifold absolute pressure, throttle position, coolant temperature, charge temperature, manifold air temperature, exhaust gas oxygen content and vehicle speed/distance sensor.

Vehicle conditions monitored include vehicle speed and the status (off or on) of several vehicle systems that affect engine load. These include the transmission neutral safety, brake light and A/C clutch switches.

The Single Module Engine Controller (SMEC) controls the entire ignition system. The SMEC has a built in microprocessor that continually receives input from the engine monitoring sensors. The computer electronically advances and retards timing and adjusts the air/fuel mixture to provide even driveability and the most efficient fuel burn possible during operation.

Single Module Engine Controller (SMEC). Scheme 128

MPFI Turbo I & II Computer, Input Sensors & Output Devices. Scheme 129

BASIC SYSTEM DESCRIPTION

The computerized engine control system consists of 6 sub-systems: computer, sensors and switches, fuel control, ignition, emission control and air conditioning compressor cut-out.

TROUBLE CODE-TO-TEST MENU

Note. DR refers to Driveability tests, CH refers to Charging System tests, NS refers to No Start tests.

TROUBLE CODE-TO-TEST MENU

COMPUTER OPERATION

The Single Module Engine Controller (SMEC) controls the entire ignition system. The SMEC ignites the fuel mixture according to different engine operating conditions, by delivering an infinite amount of variable electronic spark advance curves. A microprocessor built-in the unit continually receives input from the engine monitoring sensors. The computer then electronically advances or retards ignition timing to provide even driveability during operation.

During cranking, the SMEC provides a set amount of timing advance for a quick efficient start. The SMEC also electronically adjusts the air/fuel mixture to ensure the most efficient fuel burn possible.

AUTOMATIC SHUTDOWN RELAY (ASD)

When there is no ignition signal present with the ignition switch in the "RUN" position, the auto shutdown relay interrupts power to the electric fuel pump, fuel injectors, and ignition coil. The ASD relay is mounted by the SMEC controller.

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

The MAP sensor is mounted underhood on the right strut tower. The MAP sensor monitors manifold vacuum through a vacuum line from the throttle body to the sensor.

The sensor transmits information on manifold vacuum conditions and barometric pressure to the SMEC. This information is combined with data supplied by other sensors to determine correct air/fuel ratio.

OXYGEN (O2) SENSOR

The oxygen sensor is located on top of the exhaust manifold, just ahead of the tailpipe connection or turbo outlet (turbo models), so that it is exposed to exhaust. The sensor is electrically heated internally for faster switching when engine is running. Its function is to monitor the oxygen content of the exhaust, and to supply the SMEC with a voltage signal which is directly proportional to amount of oxygen in the exhaust.

If the oxygen content of the exhaust is high (lean air/fuel mixture), voltage signal from the sensor to the controller is low. As oxygen content decreases (mixture becomes richer), the signal voltage increases.

In this manner, the SMEC is kept constantly informed of air/fuel ratio. It can then alter fuel injector "on" time, in response to these signals, to obtain the best air/fuel ratio under any given condition.

COOLANT TEMPERATURE SENSOR (CTS)

The coolant temperature sensor measures temperature of engine coolant. The coolant temperature sensor is mounted near the thermostat housing. The CTS provides data on engine operating temperature to the SMEC.

Information provided by this sensor allows controller to provide slightly richer air/fuel mixtures and higher idle speeds during cold engine operation. The sensor is a variable resistor with a range of minus 40°F (4.5°C) to 265°F (130°C). Sensor is also used to turn on radiator fan.

CHARGE TEMPERATURE SENSOR

The charge temperature sensor (Turbo II only), mounted on the intake manifold, measures the temperature of the incoming air/fuel mixture. This information is used by the SMEC to modify the air/fuel ratio.

THROTTLE POSITION SENSOR (TPS)

The TPS is a variable resistor which is operated by movement of throttle shaft. It is mounted on the throttle body and senses throttle blade opening angle.

The sensor produces a voltage signal that varies with throttle angle. This signal is transmitted to the SMEC where it is used to adjust air/fuel ratio during acceleration, deceleration, idle and wide open throttle conditions.

CONTROL SWITCHES

Several switches provide operating information to the Single Module Engine Controller (SMEC). These include the idle, neutral safety, distance sensor, cruise control, air conditioning clutch and brake light switches. If one or more of these switches is sensed as being in the "on" position, the SMEC signals the Automatic Idle Speed Motor (AIS) to increase idle speed to a specific RPM.

With the air conditioning on and the throttle blade greater than a specific angle, the wide open throttle cut-out relay prevents the air conditioning clutch from engaging until the throttle blade angle is reduced.

FUEL PUMP

The Multi-Point Fuel Injection (MPFI) turbocharged vehicles use 2 different types of electric fuel pumps. These pumps are not interchangeable because of different operating pressures.

The MPFI (Turbo) fuel pump is a positive displacement, roller vane immersible pump with a permanent magnet electric motor. Voltage to operate pump is supplied through the Auto Shutdown Relay (ASD). The MPFI is under a constant pressure of 55 psi (3.9 kg/cm 2 ).

FUEL REGULATOR

On turbo models, the regulator supplies fuel to the fuel rail and the 4 injectors at a constant 55 psi (3.9 kg/cm 2 ) pressure.

FUEL INJECTOR

On turbo models, 4 injectors are mounted on a fuel rail, supplying the intake manifold with the proper fuel supply.

Power to the injector(s) is supplied by the SMEC, which determines when and how long the injector should operate. When electric current is supplied to the injector, an integral armature and pintle valve move a short distance against a spring, opening a small orifice.

Fuel supplied to the injector is forced around the pintle valve and through this opening, resulting in a fine spray of fuel in the shape of a hollow cone. A constant pressure drop is maintained across the injector (by the pressure regulator). The length of time that this opening is maintained (injector "on" time) determines the amount of fuel entering the engine and, therefore, the air/fuel ratio.

Cross-Sectional View of Multi-Point Fuel Injector. Scheme 130

AUTOMATIC IDLE SPEED MOTOR (AIS)

The Automatic Idle Speed Motor (AIS) is operated by the SMEC. Data from the throttle position sensor, speed sensor, coolant temperature sensor, and various switch operations, are used by the SMEC to adjust engine idle to a predetermined speed. The AIS adjusts the air portion of the air/fuel mixture through an air by-pass in the throttle body.

Dying on deceleration is also prevented by increasing engine idle when the throttle is closed too quickly.

IGNITION SYSTEM OPERATION

The Hall Effect pick-up is used on the 2.2L, 2.5L and turbo models. The Hall Effect pick-up is located in the distributor assembly and supplies the engine RPM, fuel injection synchronization (turbo engines), and ignition timing data to the SMEC to advance or retard the ignition spark as required by driving conditions.

PURGE SOLENOID

The purge solenoid is controlled by the SMEC. When engine temperature is less than 145°F (61°C), the SMEC grounds the purge solenoid and energizes it. This closes the solenoid valve, preventing vacuum from reaching the charcoal canister valve.

When this temperature is reached, the SMEC breaks the ground circuit, allowing vacuum to reach the canister purge valve so that fuel vapors may be purged from the canister.

A/C COMPRESSOR CUT-OUT OPERATION

The A/C cut-out relay is wired in series with the A/C damped pressure switch and A/C switch. This relay is on during A/C operation. When the SMEC senses a wide open throttle condition through the throttle position sensor, or low engine RPM, it will de-energize the relay, opening the contacts and preventing compressor clutch engagement.

CHECK ENGINE LIGHT OPERATION

This check engine light comes on each time the ignition is turned on and stays on for 3 seconds as a bulb test. If the SMEC receives incorrect signals or no signal is received from various sensors, the check engine light is illuminated. This is a warning that the SMEC has gone into "Limp-In Mode" in an attempt to keep the system operational.

It can also be used to display trouble codes. Cycle the ignition to on, off, on, off, on within 5 seconds and any fault codes stored in the SMEC will be displayed.

WASTEGATE CONTROL SOLENOID OPERATION

On turbo models, the SMEC adjusts maximum boost to match changing engine conditions by varying the duty cycle of the wastegate solenoid.

BAROMETRIC READ SOLENOID OPERATION

On turbo models only. The barometric read solenoid is controlled by the SMEC. Located in the MAP sensor vacuum line, the solenoid controls whether manifold pressure is supplied to the MAP sensor. Atmospheric pressure is supplied to the MAP sensor periodically to measure barometric pressure. This occurs at closed throttle, once per throttle closure, but no more often than once every 3 minutes and within a specific RPM range. The information is used primarily for boost control.

TESTING & DIAGNOSIS PRELIMINARY CHECKS

Most driveability problems in the engine control system result from faulty or poor wiring, or loose and/or leaking hose connections. To avoid unnecessary component testing, a visual check should be performed before beginning trouble shooting procedures to help spot these common faults. A preliminary visual check should include

1. Air ducts to air cleaner and from air cleaner to throttle body.
2. Electrical connections at all components. Clean, tight and unbroken.

Check vacuum lines for secure, leak-free connections in these areas

1. Throttle body.
2. EGR, purge, wastegate and barometric read solenoids (located on a common bracket at right rear corner of engine compartment).
3. Vapor canister.
4. Vacuum source and fuel pressure regulator.
5. PCV valve and turbocharger.
6. PCV valve to intake manifold vacuum port.
7. Backpressure transducer.
8. MAP sensor.

Ensure that the following electrical connectors are securely attached

1. 14-pin and 60-pin connectors at the Single Module Engine Controller (SMEC).
2. 3-pin heated O2 sensor connector.
3. 2-pin coolant temperature sensor connector.
4. Check engine light.
5. 2-pin distance sensor connector.
6. 3-pin MAP sensor connector.
7. 2-pin canister purge solenoid connector.
8. 3-pin distributor connector.
9. 3-pin Black distributor reference connector.
10. 3-pin TPS connector.
11. 4-pin AIS motor connector.
12. 2-pin throttle body temperature sensor connector.
13. 4-pin A/C cut-out relay connector.
14. 3 and 1-pin radiator fan relay connector.
15. 4-pin ASD relay connector.
16. 4-pin and 1-pin barometric read wastegate and purge solenoid connector.
17. 2-pin charge temperature sensor connector.

SYSTEM DIAGNOSIS

Note. You will not get a code 88 if you are using the "CHECK ENGINE LIGHT" to diagnose the engine control system. There will be a 2-second bulb check, followed by the codes and ending with a code 55. A code 88 will only be set when using Chrysler's DRB: II Tester. Some other "SCAN" testers may also set a code 88 under certain conditions. Check manufacture equipment for specific instructions.

The self-diagnostic capabilities of this system, if properly utilized, can greatly simplify testing. The SMEC has been programmed to monitor several different circuits of the fuel injection system. If a problem is sensed with a monitored circuit often enough to indicate an actual problem, a fault code is stored in the SMEC.

A check engine light comes on or could be activated for display of trouble codes. This light acts as a warning device to inform the operator that a malfunction in the system has occurred and immediate service is required.

When certain malfunctions occur, the SMEC enters the "Limp-In Mode". In this mode, the SMEC attempts to compensate for the failure of the particular component by substituting information from other sources. This will allow the vehicle to be operated until proper repairs can be made.

Once these codes are known, refer to the trouble codes listed in this article to determine the questionable circuit. Then use the wiring diagrams to locate testing points for each circuit. Test circuits and repair or replace as needed. If the problem is repaired or ceases to exist, the logic module cancels the trouble code after 50-100 ignition on/off cycles.

DIAGNOSTIC MODE

1. Attach the Chrysler DRB II Tester (C-4805 ) to self-test connector. The connector is located in the engine compartment near the right side shock tower. If diagnostic readout box is not available, codes may be read off of the "Check Engine Light".
2. Start engine (if possible). Move transmission shift lever through all positions, ending in Park. Turn A/C switch on, then off (if equipped).
3. Stop the engine and, without starting it again, turn key on, off, on, off and on. Record 2-digit trouble codes as displayed on readout box or by counting flashes on check engine light.
4. The 2-digit codes displayed by the check engine light are indicated by a series of flashes. For example, code 23 is displayed as flash, flash, 4-second pause, flash, flash, flash. After a slightly longer pause, any other codes stored are displayed in numerical order. Once the light begins to display trouble codes, it cannot be stopped. If you lose count, it will be necessary to start over with step 2).
5. Code 88 indicates start of test. If 88-12-55 is displayed, this indicates that there are no fault codes stored.
6. The setting of a specific trouble code is the result of a particular system failure, NOT the reason for that failure, such as failure of a specific component. Therefore, the existence of a particular code denotes the probable area of the malfunction, not necessarily the failed component itself.

SWITCH TEST MODE

The digital display must change between 00 and 88 and the flashing of the "Check Engine Light" when the following switches are activated and released

1. Brake Switch.
2. Gear Shift Selector.
3. A/C Switch (if equipped).

CIRCUIT ACTUATION TEST MODE (ATM)

1. Put system into Diagnostic Mode. Wait for code 55 to appear on readout box display. Press ATM button on readout box and hold until the desired ATM test code is displayed. Release ATM button.
2. The computer will continue to turn the selected circuit on and off for as long as 5 minutes or until ATM button is pressed again or ignition is turned off.

SENSOR TEST MODE

The sensor test mode allows the output of 7 sensors and the state of 3 switches to be displayed on the tester while the engine is not running. This provides a means by which the entire circuit for each individual sensor and switch can be checked, including the wiring and SMEC circuitry.

To obtain sensor test mode

1. Put system into diagnostic test mode and wait for code 55 to appear on display screen.
2. Press ATM button to activate display. Hold ATM button down until the desired test code appears.
3. Slide switch to "Hold" position to display the corresponding sensor output level.

ENGINE RUNNING TEST MODE

1. Connect diagnostic tool to engine harness connector. Engine running test mode can performed with engine at idle, transmission in neutral and parking brake on, or while driving the car.
2. To select a test code, move switch to "Read" position, depress actuator button until the desired code appears.
3. Release actuator button, switch read/hold switch to "Hold" position. The SMEC will monitor that system test and results will be displayed.

Note. If using a diagnostic readout box other than Chrysler's DRB II, follow manufacturer's instructions on how to connect readout box and obtain codes. Some of these other readout boxes will display information that is not contained in this testing. This information may not be relative to diagnosing a problem. Only information in this article should be used during diagnosis.

TROUBLE CODE DESCRIPTIONS

The TBI and MPFI injection systems are equipped with a self-diagnostic capability which stores certain trouble codes in the SMEC when system malfunctions occur. Trouble codes are 2-digit numbers that will tell you if certain sequences or conditions have occurred. Fault codes indicate the results of a failure but do not always identify the failed component.

Code 88

First code displayed to indicate start of test. This code must appear first or diagnostic codes will be incorrect. A code 88 will only be set when using Chrysler's DRB: II Tester. Some other "SCAN" testers may also set a code 88 under certain conditions. Check manufacture equipment for specific instructions.

Code 11

Distributor signal circuit. Displayed if no distributor signal is sent to SMEC after restoration of battery voltage.

Code 12

Memory standby power. Displayed if battery feed to SMEC has been disconnected within last 30 engine starts.

Code 13

MAP sensor pneumatic system. Check engine light also turned on. Displayed if sensor vacuum level does not change between cranking and when engine starts.

Code 14

MAP sensor electrical system. Check engine light also turned on. Displayed if MAP sensor signal is outside range of .02-4.9 volts.

Code 15

Code indicates a problem with vehicle distance/speed sensor circuit.

Code 16

Loss of battery voltage sensed. Displayed if battery sensing voltage drops below 4 volts or between 7.5-8.5 volts for more than 20 seconds.

Code 17

Engine running too cool. Displayed if engine coolant temperature does not reach 160°F (71°C) after 20 minutes running time.

Code 21

Oxygen sensor feedback circuit. Displayed if no oxygen sensor signal is sensed for more than 22 seconds when in closed loop.

Code 22

Coolant temperature sensor circuit. Check engine light also turned on. Displayed if sensor voltage is above 4.96 volts on cold engine or below .51 volts on warm engine.

Code 23

Problem with charge temperature sensor circuit. Appears if sensor indicates an incorrect temperature of a temperature that changes too fast.

Code 24

TPS circuit. Check engine light also turned on. Displayed if sensor signal below .16 or above 4.7 volts.

Code 25

AIS motor driver circuit. Displayed if proper voltage not present in AIS circuit. Open circuit will not set this code.

Code 26

Fuel injector driver circuit. Displayed if current through injectors does not reach proper peak level.

Code 27

Fuel control circuit. Displayed if fuel control interface does not switch properly.

Code 31

Canister purge solenoid circuit. Displayed if solenoid does not turn on and off at correct time.

Code 33

A/C WOT cut-out relay. Displayed if relay does not turn on and off at correct time.

Code 34

Problem in speed control solenoid driver circuit.

Code 35

Radiator fan relay circuit. Displayed if relay does not turn on and off at correct time.

Code 41

Alternator field control circuit. Displayed if field control does not switch properly.

Code 42

Auto Shutdown (ASD) relay circuit. Displayed if relay does not turn on and off at correct time.

Code 43

Spark control circuit. Displayed if spark control interface does not switch properly.

Code 44

Loss of power to SMEC.

Code 46

Battery voltage sensing circuit. Check engine light also turned on. Displayed if sensed battery voltage is greater than one volt above desired control voltage for longer than 20 seconds.

Code 47

Battery voltage sensing circuit. Displayed if sensed battery voltage is less than one volt below desired control voltage for more than 20 seconds.

Code 51

Oxygen feedback system circuit. Displayed if system stays lean for more than 2 minutes.

Code 52

Oxygen feedback system circuit. Displayed if system stays rich for more than 2 minutes.

Code 53

Internal logic module problem. Displayed if logic module fails.

Code 55

End of diagnostic mode. Always displayed as final code after all other fault codes have been displayed.

Note. In the following diagnostic testing, illustrations are supplied courtesy of Chrysler Motors.

ERASING CODES FROM SMEC MEMORY

1. To erase codes from memory, the DRB-II Tester (C-4805) MUST be used. Put system into Diagnostic Test Mode and wait for "55" to appear on display.
2. Press "READ/HOLD" key until "READ" is displayed. Press "F3" key, then enter Sensor Test Code "10" and press "ENTER" key. Press "READ/HOLD" key until "HOLD" is displayed.

Note. Since sensor test codes are the same as ATM codes, the ATM test circuit will turn on before "HOLD" is displayed.

Display will flash "0" for 4 seconds. When flashing stops, all codes have been cleared from memory.

NO START TEST INFORMATION

Because of the limited space available for titles in this product, NO START test titles have been shortened to NS. This allows more useable information to be displayed in the option menu.

NS1 - IGNITION SYSTEM CHECK

Note. Before replacing major components, be sure connector pins or cavities are not damaged, preventing proper voltage and resistance readings.

1. Disconnect any spark plug wire. Insert an insulated screwdriver or a spark tester into spark plug terminal. If using screwdriver, hold screwdriver shaft about 1/4" from a good ground. Have an assistant crank engine. CAUTION: Fault/Trouble Codes may erase and SMEC damage may occur if spark plug wire is held more than 1/4" from ground while cranking.
2. If there is good spark between screwdriver and ground as long as engine is cranking, go to «NS2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns2-fuel-system-check) . Treat 1-2 sparks as no spark. If there is no spark, go to step 3). If there is good spark, but engine is hard to start or starts and stalls, go to «NS9»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns9-checking-fuel-system-for) .
3. Disconnect coil wire from distributor cap. Hold wire 1/4" away from ground. Crank engine. If there is good spark from coil wire, repair secondary ignition system. Check or replace distributor cap, rotor and spark plug wires. Treat 1-2 sparks as no spark.
4. If there is no spark from coil wire, connect voltmeter between Dark Green/Black wire at positive terminal of coil and ground. Crank engine for at least 7 seconds. If voltmeter reading is within one volt of battery voltage as long as engine is cranking, go to «NS6»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns6-ignition-control-system-fault) . If voltmeter reads zero volts or cranking voltage for about one second, go to «NS12»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns12-checking-system-for-fault) .

Ignition System Check. Scheme 131

NS2 - FUEL SYSTEM CHECK

1. Relieve fuel system pressure. Install pressure gauge to fitting on fuel rail. Crank engine for at least 7 seconds. Fuel pressure should be at least 40 psi. If pressure is okay, go to step 2). If fuel pressure is less than 40 psi, go to «NS5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) .
2. Connect Diagnostic Readout Box II (C-4805) to engine harness connector. Put system into Sensor Test Mode "05". If display reads .5-1.5 volt, go to step 3) If reading is greater than 1.5 volts, replace throttle position sensor. If system will not go into Sensor Test Mode (no code 88), replace SMEC.
3. With DRB II connected to engine harness connector, connect a voltmeter to Dark Green/Black wire of injector harness 6-pin connector and ground. Put system in ATM Test Mode "02". If voltmeter reading is zero, repair open circuit in injector harness connector to wiring harness splice. If voltmeter reading is within one volt of battery voltage, go to NS3 below.

Fuel System Check. Scheme 132

NS3 - CHECK FOR FUEL FOULED SPARK PLUGS

Remove spark plugs. Inspect spark plug tips for wet fuel. If spark plugs are wet with fuel, clean and reinstall plugs. Attempt to start vehicle. If spark plugs are not wet with fuel, go to NS4 below.

Note. It is normal for spark plugs to be Black after engine is started cold.

NS4 - CHECKING ENGINE TIMING

1. Connect timing light. Have an assistant crank engine while you observe timing marks. If timing is 0-16 degrees BTDC, remove distributor cap and crank engine to ensure rotor is turning and is indexed correctly. Check engine compression and valve timing.
2. If timing is not between 0-16 degrees BTDC, set timing to 10 degrees BTDC during cranking. If engine starts, reset timing to specification. If engine does not start, remove distributor cap and crank engine to ensure distributor rotor is turning and is indexed correctly. Check engine compression and valve timing.

Scheme 133

1. Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Press and hold ATM key on DRB II. If fuel pump is running, check all fuel lines for kinks, restrictions and leaks. Check for a plugged fuel filter. If fuel lines and filter check okay, remove and inspect fuel pump. Check for fuel contamination.
2. If fuel pump was not running, leave DRB II connected to engine harness connector and in Diagnostic Test Mode. Raise vehicle on a hoist. Disconnect in-tank fuel pump connector. Connect positive voltmeter lead to Dark Green/Black wire in fuel pump connector. Connect negative voltmeter lead to Gray wire in connector. (Scheme 133): Fuel Pump Check
3. If voltmeter is reading within one volt of battery voltage, replace fuel pump. If voltmeter reading is zero volts, move negative voltmeter lead to a good ground. Press ATM key on DRB II. If voltage reading is within one volt of battery voltage, repair Gray wire for an open circuit. If voltage reading is still zero, repair Dark Green/Black wire for an open circuit.

NS6 - IGNITION CONTROL SYSTEM FAULT CODE CHECK

Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Record all codes. If 88-12-55 is displayed (no fault codes), go to NS7 below. If 88-12-43-55 is displayed (spark control circuit), go to NS8 .

Scheme 134

Scheme 135

1. Connect DRB II to engine harness connector. Connect analog voltmeter to ignition coil negative terminal and ground. Put system in ATM Test "01". If voltmeter reading is pulsating between 10-14 volts, replace ignition coil. (Scheme 134): Ignition Control Circuit Check (Turbo) "A"
2. If voltmeter reading is not pulsating, but reads battery voltage, go to step 3). If voltmeter reading is pulsating between 5-10 volts, replace ignition coil. If voltmeter reading is pulsating between 0-2 volts, go to step 4).
3. Turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to ignition coil negative terminal and 14-pin connector cavity No. 12. If there is not continuity, repair Black/Yellow wire in cavity No. 12 for an open circuit. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in connector cavity No. 12 is not damaged causing a poor connection. (Scheme 135): Ignition Control Circuit Check (Turbo) "B"
4. With DRB II connected to engine harness connector, turn ignition off. Disconnect wire from negative side of ignition coil. Connect voltmeter to ignition coil negative terminal and ground. Put system in ATM Test "01". If voltmeter reading is between 0-2 volts, replace ignition coil.
5. If voltmeter reading is greater than 10 volts, turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to 14-pin connector cavity No. 12 and ground. If there is not continuity, replace SMEC for a defective power board. If there is continuity, repair Black/Yellow wire to cavity No. 12 for a short circuit to ground.

Ignition Control Circuit Check (Turbo) "C". Scheme 136

Scheme 137

Scheme 138

1. Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Turn ignition off. Disconnect coil wire from distributor cap and hold wire 1/4" away from good ground. Disconnect 60-pin connector from SMEC. Connect one end of a jumper wire to cavity No. 34 of 60-pin connector. Turn ignition on. (Scheme 137): Ignition Control Circuit Check (All Engines) "A"
2. Press and hold ATM key on DRB II. Touch other end of jumper wire to good ground. Make and break this connection several times. If there is spark as you make and break this connection, replace SMEC for a defective logic board. Before replacing SMEC, ensure terminal in cavity No. 34 is not damaged causing a poor connection.
3. If there is no spark as you make and break the connection, turn ignition off. Remove jumper wire from 60-pin connector. Disconnect 14-pin connector from SMEC. Connect ohmmeter leads to 60 pin connector cavity No. 34 and 14-pin connector cavity No. 13. (Scheme 138): Ignition Control Circuit Check (All Engines) "B"
4. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in cavity No. 13 is not damaged causing a poor connection. If there is no continuity, repair Yellow wire to cavity No. 13 for an open circuit.

NS9 - CHECKING FUEL SYSTEM FOR FAULT CODES

Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Record all codes. If there are no fault codes, go to DR1 . If codes 88-12-26-55 (fuel injector driver circuit) are shown, go to NS10 below. If codes 88-12-27-55 (fuel injector control circuit) are shown, go to NS11 .

Scheme 139

Scheme 140

Scheme 141

1. Connect DRB II to engine harness connector. Disconnect all injectors. Put system in ATM Test Mode "02". Connect negative voltmeter lead to ground and touch positive voltmeter lead to Dark Green/Black wire in each injector connector. If there is no voltage at one or more of the connectors, repair Dark Green/Black wire for an open circuit to injector connector. (Scheme 139): Checking Injector Driver Circuits (Turbo) "A"
2. If there is battery voltage at each connector, connect No. 1 injector and listen for a click. Disconnect No. 1 injector. Connect No. 2 injector and listen for a click. Disconnect No. 2 injector. Connect No. 3 injector and listen for a click. Disconnect No. 3 injector. Connect No. 4 injector and listen for a click.
3. If any injector does not click, replace injector. Before replacing injector, check Tan and White wires to injectors for an open circuit. If No. 1 and No. 2 injectors do not click, go to next step. If injectors No. 3 and No. 4 do not click, go to step 6).
4. Turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to 14-pin connector cavity No. 9 and ground. If there is continuity, repair White wire to cavity No. 9 for a short to ground. If there is no continuity, connect ohmmeter to 14-pin connector cavity No. 9 and White wire of injector harness connectors No. 1 and No. 2. (Scheme 140): Checking Injector Driver Circuits (Turbo) "B"
5. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14-pin connector cavity No. 9 is not damaged causing a poor connection. If there is no continuity, repair White wire to cavity No. 9 for an open circuit to injector harness connector.
6. With ignition off and 14-pin connector disconnected from SMEC, connect ohmmeter to 14-pin connector cavity No. 10 and ground. If there is continuity, repair Tan wire to connector cavity No. 10 for a short to ground. If there is no continuity, connect ohmmeter to 14 pin connector cavity No. 10 and Tan wire of injector connectors No. 3 and No. 4. (Scheme 141): Checking Injector Driver Circuits (Turbo) "C"
7. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14-pin connector cavity No. 10 is not damaged causing a poor connection. If there is no continuity, repair Tan wire to cavity No. 10 for an open circuit to injector harness connector.

Scheme 142

Scheme 143

Scheme 144

1. Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect one end of jumper wire to 60-pin connector cavity No. 33. Turn ignition switch to "RUN" position. Press and hold ATM key on DRB II. Touch other end of jumper wire to positive battery terminal. (Scheme 142): Checking Injector Control Circuits (Turbo) "A"
2. If injectors No. 1 and No. 2 click, go to step 3). If injectors No. 1 and No. 2 do not click, turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter between 60-pin connector cavity No. 33 and 14-pin connector cavity No. 8. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14-pin connector cavity No. 8 is not damaged causing a poor connection. If there is no continuity, repair Voilet/Yellow wire to cavity No. 10 for an open circuit to injector harness connector. (Scheme 143): Checking Injector Control Circuits (Turbo) "B"
3. With DRB II connected and system in Diagnostic Test Mode, disconnect 60-pin connector from SMEC. Connect one end of jumper wire to 60-pin connector cavity No. 32. Press and hold ATM key on DRB II. Touch other end of jumper wire to positive battery terminal. If injectors No. 3 and No. 4 click, replace SMEC for a defective logic board. (Scheme 144): Checking Injector Control Circuits (Turbo) "C"
4. If injectors No. 3 and No. 4 do not click, turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to 60-pin connector cavity No. 32 and 14-pin connector cavity No. 5. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14-pin connector cavity No. 5 is not damaged causing a poor connection. If there is no continuity, repair Gray/White wire between 14-pin and 60-pin connectors for an open circuit.

Checking Injector Control Circuits (Turbo) "D". Scheme 145

NS12 - CHECKING SYSTEM FOR FAULT CODES

1. Connect DRB II to engine harness connector. Erase fault codes. Turn ignition switch to "RUN" position for 5 seconds. Crank engine for 7 seconds and return ignition switch to "RUN" position for 5 seconds. Turn ignition off. Put system in Diagnostic Test Mode. Record all codes. If 88-12-55 (no fault codes) is displayed, repair Dark Green/Black wire of auto shutdown relay for an open circuit.
2. If no code 88 or 00 (system power circuits), go to NS13 below. If code 88-11-12-55 (distributor reference pick-up circuit) is displayed, go to «NS14»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If code 88-42-55 (auto shutdown relay pull-in coil circuit) is displayed, go to «NS15»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If code 88-44-55 is displayed, go to «NS17»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns17-code-44-checking-fused) .
3. If codes 88-12-14-22-24-55 or 88-12-14-22-23-24-55 are displayed, repair Black/Light Blue wire to 60-pin connector cavity No. 4 for an open circuit. If code 88-12-54-55 (distributor sync pick-up circuit) is displayed, go to «NS16»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) .

Scheme 146

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

1. Turn ignition off. Disconnect Throttle Position Sensor (TPS) connector. Turn ignition on. Connect voltmeter to Voilet/White wire at TPS connector and ground. If there is at least 4.5 volts, go to next step. If there is no voltage, go to step 4). (Scheme 146): Checking Supply & Ground Circuits (Turbo) "A"
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect one ohmmeter lead to system ground eyelet. Touch other lead to 60-pin connector cavity No. 15 and then cavity No. 16. If ohmmeter is showing less than.5 ohm resistance in both wires, replace SMEC for a defective logic board. (Scheme 147): Checking Supply & Ground Circuits (Turbo) "B"
3. If there is no continuity, repair Black wires for an open circuit to wiring harness splice. Replace SMEC. If ohmmeter is showing more than.5 ohm resistance, repair Black wires for high resistance to ground eyelet.
4. If voltmeter reading in step 1) was zero volts, disconnect MAP sensor connector. Touch positive voltmeter lead to Voilet/White wire at TPS sensor connector. If voltmeter reading is at least 4.5 volts, replace MAP sensor. If voltmeter reading is zero volts, turn ignition off.
5. Disconnect 60-pin connector from SMEC. Connect negative voltmeter lead to ground. Turn ignition on. Touch positive voltmeter lead to cavity No. 52 (Orange wire) of 60-pin connector. If voltmeter reading is at least 8 volts, replace SMEC for a defective logic board. Before replacing SMEC, check for a damaged terminal in 60-pin connector cavity No. 52 causing a poor connection. (Scheme 148): Checking Supply & Ground Circuits (Turbo) "C"
6. If voltmeter reading is zero volts, disconnect Black distributor reference pick-up harness connector. Connect negative voltmeter lead to ground. Connect positive voltmeter lead to Orange wire in 60-pin connector cavity No. 52. If voltmeter reading is at least 8 volts, replace distributor pick-up.
7. If voltmeter reading is zero volts, turn ignition off. With 60-pin and distributor pick-up connectors disconnected, connect ohmmeter to 60-pin connector cavity No. 52 and Orange wire terminal of distributor harness connector. If there is no continuity, repair Orange wire to 60-pin connector for an open circuit to wiring harness splice. (Scheme 149): Checking Supply & Ground Circuits (Turbo) "D"
8. If there is continuity, disconnect 14-pin connector from SMEC. Connect negative voltmeter lead to ground. Turn ignition on. Touch positive voltmeter lead to Dark Blue wire in 14-pin connector cavity No. 4. If voltmeter reading is not within one volt of battery voltage, repair Dark Blue wire to 14-pin connector for an open circuit to wiring harness splice. (Scheme 150): Checking Supply & Ground Circuits (Turbo) "E"
9. If voltmeter reading is within one volt of battery voltage, turn ignition off. Connect one ohmmeter lead to system ground eyelet. Connect other lead to 14-pin connector cavity No. 6 and then to cavity No. 7. If ohmmeter is showing continuity at both cavities with less than.5 ohm resistance, replace SMEC for defective power board. Before replacing SMEC, ensure terminals in connector cavities No. 6 and No. 7 are not damaged causing a poor connection. (Scheme 151): Checking Supply & Ground Circuits (Turbo) "F"
10. If ohmmeter is not showing continuity at both cavities, repair Black wires in 14-pin connector cavities No. 6 and No. 7 for an open circuit to wiring harness splice. Replace SMEC. If ohmmeter is showing continuity with greater then.5 ohm resistance, repair ground circuit for high resistance to system ground eyelet.

Scheme 152

Scheme 153

Scheme 154

Scheme 155

Scheme 156

1. Turn ignition off. Connect DRB II to engine harness connector. Disconnect Black distributor reference pick-up coil connector. Turn ignition switch to "RUN" position. Connect a jumper wire between distributor reference pick-up coil connector cavities No. 2 and No. 3. Make and break this connection several times. Put system in Diagnostic Test Mode. Record all codes. (Scheme 152): Checking Distributor Pick-Up Harness (Turbo) "A"
2. If 88-11-12-54-55 is displayed, disregard code 54 and go to step 4). If 88-12-54-55 is displayed, disregard code 54. With distributor pick-up coil connector disconnected, connect voltmeter to distributor pick-up coil connector cavity No. 1 and ground. (Scheme 153): Checking Distributor Pick-Up Harness (Turbo) "B"
3. If voltmeter reading is at least 7 volts, replace distributor reference pick-up. Before replacing pick-up, ensure distributor harness connector terminals are not spread apart causing a poor connection. Also ensure distributor rotor turns while cranking engine. If voltmeter reading is zero volts, repair Orange wire to connector cavity No. 1 for an open circuit to wiring harness splice.
4. With ignition on, connect positive voltmeter lead to distributor connector cavity No. 3. Connect negative voltmeter lead to distributor connector cavity No. 2. If voltmeter reading is at least 4 volts, replace SMEC. (Scheme 154): Checking Distributor Pick-Up Harness (Turbo) "C"
5. If voltmeter reading is zero volts, connect positive voltmeter lead to distributor connector cavity No. 3. Connect negative voltmeter lead to a good engine ground. If voltmeter reading is at least 4 volts, repair Black/Light Blue wire in distributor connector cavity No. 2 for an open circuit to wiring harness splice. (Scheme 155): Checking Distributor Pick-Up Harness (Turbo) "D"
6. If voltmeter reading is zero volts, turn ignition off. Disconnect 60-pin connector from SMEC. Connect an ohmmeter to distributor connector cavity No. 3 and 60-pin connector cavity No. 47. If there is no continuity, repair Gray wire to 60-pin connector cavity No. 47 or an open circuit to distributor connector. (Scheme 156): Checking Distributor Pick-Up Harness (Turbo) "E"
7. If there is continuity, replace SMEC for a defective logic board. Before replacing SMEC, ensure terminal in connector cavity No. 47 is not damaged causing a poor connection.

Scheme 157

Scheme 158

Scheme 159

Scheme 160

Scheme 161

1. Connect DRB II to engine harness connector. Connect voltmeter to Dark Blue/Yellow wire in auto shutdown relay 4-pin connector and ground. Put system in ATM Test Mode "06". If voltmeter pulsates between 0-12 volts, go to next step. If voltmeter reading is within one volt of battery voltage and system cannot be put in ATM Test Mode "06", go to step 6). If voltmeter reading is 0-1 volt steady and system cannot be put in ATM Test Mode "06", go to step 4). (Scheme 157): Checking Auto Shutdown Relay (Turbo) "A"
2. Connect voltmeter to Red wire in auto shutdown relay 4-pin connector and ground. If voltmeter reading is zero volts, repair Red wire for an open circuit to wiring harness splice. If voltmeter reading is within one volt of battery voltage, turn ignition off. Connect one end of jumper wire to Dark Green/Black wire of auto shutdown relay 4-pin connector. (Scheme 158): Checking Auto Shutdown Relay (Turbo) "B"
3. Touch other end of jumper wire to Red wire in auto shutdown relay 4-pin connector. If fuel pump turns on, replace auto shutdown relay. If fuel pump does not turn on, repair Dark Green/Black wire in auto shutdown relay connector for an open circuit to wiring harness splice. (Scheme 159): Checking Auto Shutdown Relay (Turbo) "C"
4. Turn ignition off. Connect negative voltmeter lead to ground. Connect positive voltmeter lead to Dark Blue/White wire of auto shutdown relay 4-pin connector. Turn ignition on. If voltmeter reading is within one volt of battery voltage, replace auto shutdown relay. (Scheme 160): Checking Auto Shutdown Relay (Turbo) "D"
5. If voltmeter reading is zero volts, turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to 14-pin connector cavity No. 3 and Dark Blue/White wire of auto shutdown relay 4-pin connector. If there is no continuity, repair Dark Blue/White wire in 14-pin connector cavity No. 3 for an open circuit to auto shutdown relay. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in connector cavity No. 3 is not damaged causing a poor connection. (Scheme 161): Checking Auto Shutdown Relay (Turbo) "E"
6. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect voltmeter to Dark Blue/Yellow wire in 60-pin connector cavity No. 58 and ground. Turn ignition on. If voltmeter reading is zero volts, repair Dark Blue/Yellow wire for an open circuit to auto shutdown relay. If voltmeter reading is within one volt of battery voltage, replace SMEC. Before replacing SMEC, ensure terminal in connector cavity No. 58 is not damaged causing a poor connection.

Checking Auto Shutdown Relay (Turbo) "F". Scheme 162

Scheme 163

Scheme 164

1. Turn ignition off. Disconnect Gray distributor sync pick-up connector. Turn ignition switch to "RUN" position. Connect negative lead of digital voltmeter to cavity No. 3 of sync pick-up harness connector. Connect positive lead of digital voltmeter to cavity No. 1 and then cavity No. 2 of harness connector. (Scheme 163): Checking Distributor Sync Pick-Up (Turbo) "A"
2. If voltmeter reading is at least 7 volts at both terminals. Replace distributor sync pick-up. Before replacing pick-up, ensure terminals in harness connector are not damaged causing a poor connection. If voltmeter reading is zero volts at connector cavity No. 1, repair Orange wire for an open circuit to wiring harness splice.
3. If voltmeter reading is zero volts at cavities No. 1 and No. 2, repair Black/Light Blue wire in cavity No. 3 for an open circuit to wiring harness splice. If voltmeter reading is zero volts at connector cavity No. 2, turn ignition off. Disconnect 60-pin connector from SMEC. Connect ohmmeter to Tan/Yellow wire in 60-pin connector cavity No. 26 and to Tan/Yellow wire in sync pick-up connector cavity No. 3. (Scheme 164): Checking Distributor Sync Pick-Up (Turbo) "B"
4. If there is continuity, replace SMEC for a defective logic board. Before replacing SMEC, ensure terminal in connector cavity No. 26 is not damaged causing a poor connection. If there is no continuity, repair Tan/Yellow wire to 60-pin connector cavity No. 26 for an open circuit to distributor sync pick-up.

NS17, CODE 44 - CHECKING FUSED J2 CIRCUIT

Turn ignition off. Disconnect 14-pin connector from SMEC. Connect ohmmeter to Dark Blue/White wire in auto shutdown relay 4-pin connector and 14-pin cavity No. 3. If there is no continuity, repair Dark Blue/White wire to 14-pin connector cavity No. 3 for an open circuit to wiring harness splice. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14-pin connector cavity No. 3 is not damaged causing a poor connection.

Checking Fused J2 Circuit. Scheme 165

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DRIVEABILITY TEST INFORMATION

Because of the limited space available for titles in this product, DRIVEABILITY test titles have been shortened to DR. This allows more useable information to be displayed in the option menu. Some DRIVEABILITY test Numbers are missing. The missing tests (DR10, DR22 and DR23) were for Non-Turbo engines and do not apply to this article.

Scheme 166

Scheme 167

Scheme 168

Scheme 169

Scheme 170

Scheme 171

1. Connect DRB II. Put system in Diagnostic Test Mode. Record all codes. If "88-12-55" (no fault codes) is displayed, go to «DR2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr24-non-engine-control-related-problems). For following fault codes, proceed to specified tests: Code 15 - Speed sensor, go to «DR3»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 17 - Coolant sensor, go to «DR5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 21 - Oxygen sensor, go to «DR4»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr4-code-21-oxygen-sensor). Code 33 - A/C cut-out relay, go to «DR11»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 51 - Oxygen feedback system locked lean, go to «DR18»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 52 - Oxygen feedback system locked rich, go to «DR18»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes).
2. Erase fault codes. Without depressing accelerator, start engine. Raise engine speed to 2000 RPM for 10 seconds and then return to idle. Cycle transmission gear selector. Turn A/C on and off (if equipped).
3. Turn ignition off. Put system into Diagnostic Test Mode. Record all codes. If the same code appears before and after the engine is started, the problem still exists. Proceed as follows: Code 12-16 - Battery voltage circuit to SMEC., go to «CH3»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ch3-code-16-battery-voltage). Code 13 - MAP sensor, go to «DR2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr24-non-engine-control-related-problems). Code 14 - MAP sensor, go to «DR2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr24-non-engine-control-related-problems). Code 17-22 - Coolant sensor, go to «DR5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 22 - Coolant sensor, go to «DR5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 23 - Charge temperature sensor (Turbo), go to «DR6»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr6-code-23-charge-temp). Code 24 - Throttle position sensor, go to «DR7»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 25 - Idle speed control motor, go to «DR8»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 26 - Injector drive, go to «NS9»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns9-checking-fuel-system-for). Code 27 - Injector interface, go to «NS9»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ns9-checking-fuel-system-for). Code 31 - Purge solenoid, go to «DR9»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 35 - Radiator fan relay, go to «DR11»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 36 - Wastegate solenoid, go to «DR12»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 37 - Baro-read solenoid, go to «DR13»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 42 - Auto shutdown relay, Repair open in wiring to connector cavity No. 10 of SMEC 60-pin connector. Code 44 - Fused or damaged circuit "J2", go to «DR14»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr14-code-44-fused-j2). Code 45 - Overboost shutdown, go to «DR15»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 51 - O2 feedback system (Lean), go to «DR18»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 52 - O2 feedback system (Rich), go to «DR18»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). Code 53 - Replace SMEC unit. NOTE: If code does not reappear, problem is not recorded, go to step 16).
4. With DRB II connected, enter Actuator Test Mode (ATM). Perform the following tests: Actuator Test "04" - The radiator fan should be cycling ON/OFF every 2 seconds. If fan cycles, press and hold ATM key until code "07" (equipped with A/C) or code "05" (without A/C) appears. If fan is not on, check fan relay. If relay clicks, repair wiring to fan. If relay does not click, replace relay. Actuator Test "05" - The A/C cut-out relay should click, every 2 seconds. If relay clicks, hold ATM key until code "07" appears. Replace relay if it does not click. During this test the A/C compressor clutch will also cycle and the cooling fans will run continuously. Actuator Test "07" - Listen for clicking from canister purge solenoid. On vehicles equipped with manual transmission, hold 66ATM key until code "10" appears. On vehicles equipped with automatic transmission, go to step 6). Replace solenoid if it does not click. Actuator Test "10" - This test is for vehicles equipped with manual transmissions. Shift indicator light should cycle ON/OFF. If light does not cycle, go to next step. If light cycles, go to step 6). Actuator Test "11" - Turbo Only - This test is for vehicles equipped with turbochargers. Wastegate solenoid may be heard clicking. If solenoid clicks, go to next step. If solenoid does not click, replace it.
5. Non-Turbo Only - Does not apply to this article. (Scheme 166): Jumper Wire Connection to 60-Pin Connector
6. With DRB II connected, enter Switch Test Mode. Check switch inputs as follows: Depress brake pedal. Move gear selector from Park, to Reverse, to Neutral, to Drive. With A/C on, turn blower on and press A/C button. DRB II display should change as each switch is activated. Disregard what is displayed, ensure only that a change in display occurs. If switch inputs are okay, go to step 11). If one or all of the switches do not pass, proceed to the following tests: Brake switch w/o speed control, go to next step. Brake switch with speed control, go to step 8). Park/Neutral switch, go to step 9). A/C button, go to step 10).
7. With ignition off, disconnect 60-pin connector from SMEC. Connect a voltmeter to White/Pink wire in connector cavity No. 29. On Omni and Horizon models connect voltmeter to White/Tan wire in connector cavity No. 29. Ensure connecting pins and harness are not damaged. Turn ignition switch to "RUN" position. Depress brake pedal. If voltmeter shows within one volt of battery voltage, replace SMEC, for a defective logic board. If voltmeter reads zero volts, check brake switch, switch circuits and voltage supply. (Scheme 167): Voltmeter Connection to 60-Pin Connector
8. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between White/Pink wire in connector cavity No. 29 and ground. On Omni and Horizon models connect ohmmeter to White/Tan wire in connector cavity No. 29 and ground. Depress and release brake pedal. If ohmmeter shows an open when pedal is depressed and has continuity when pedal is released, replace SMEC, for a defective logic board. If ohmmeter reads as described above, check brake switch, switch circuits and stoplight bulbs.
9. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between Brown/Yellow wire in connector cavity No. 30 and ground. Disconnect the battery quick disconnect. Turn ignition switch to "RUN" position. Shift gear selector to, Park, Reverse, Neutral, and Drive positions and check ohmmeter readings in each position. If ohmmeter shows continuity in each position, check for defective Neutral Safety Switch (NSS) or short to ground in Brown/Yellow wire in connector cavity No. 30. If ohmmeter shows an open circuit in all positions, repair Brown/Yellow wire in connector cavity No. 30 or replace NSS. If the ohmmeter reads as follows, replace SMEC for a defective logic board: SMEC TESTING Trans. Position Ohmmeter Park Continuity Reverse Open Neutral Continuity Drive Open
10. With ignition off, disconnect 60-pin connector from SMEC. Connect ohmmeter between Brown wire in connector cavity No. 45 and ground. Turn blower switch on, press A/C button and then press "OFF" button. NOTE: A/C system must have adequate freon charge to complete this test. If ohmmeter shows continuity when A/C button is pressed, and open when "OFF" button is pressed, replace SMEC for a defective logic board. If ohmmeter is not as described, repair Brown wire in connector cavity No. 45 for an open or short to wiring harness splice.
11. Connect DRB II, ensure "READ" is displayed. Connect a tachometer to engine. Start engine and disconnect coolant sensor. Press Read/Hold key and display "HOLD". Record engine RPM variations. Press key and display "READ". If engine speed increases to about 1500 RPM on "HOLD" and returns to idle on "READ", go to step 16). If engine speed does not increase and decrease as described, go to next step.
12. 12) With ignition off and DRB II connected, disconnect ISC motor connector. Connect voltmeter between Brown/White wire (connector cavity No. 2) and Yellow/Black wire (connector cavity No. 3) at ISC harness connector. Enter Actuator Test Mode "03". If voltmeter is pulsating every 4 seconds, SMEC and wiring is okay, replace ISC motor. If voltmeter does not pulsate, go to step 14). (Scheme 168): Voltmeter Connector to ISC Connector
13. With ignition off, disconnect 60-pin connector from SMEC. Ensure ISC motor is connected. Connect ohmmeter between Gray/Red wire in connector cavity No. 19 and Voilet/Black wire in cavity No. 20 of 60-pin connector. If ohmmeter shows continuity, replace SMEC for a defective logic board. If circuit is open, repair open in ISC circuit wiring of connector cavity No. 18 or 19.
14. With ignition off, disconnect 60-pin connector from SMEC. Ensure ISC motor is connected. Connect ohmmeter between Gray/Red wire in connector cavity No. 19 and Voilet/Black wire in connector cavity No. 20. If ohmmeter shows continuity, replace SMEC for a defective logic board. If circuit is open, repair open in ISC circuit wiring. (Scheme 169): Ohmmeter Connection to 60-Pin Connector "A"
15. With ignition off, disconnect 60-pin connector from SMEC. Ensure ISC motor is connected. Connect ohmmeter between Brown/White wire in connector cavity No. 17 and Yellow/Black wire in connector cavity No. 18. If ohmmeter shows continuity, replace SMEC for a defective logic board. If circuit is open, repair open in ISC circuit wiring. (Scheme 170): Ohmmeter Connection to 60-Pin Connector "B"
16. With ignition off, disconnect both SMEC connectors. Connect one lead of Digital Volt/Ohm Meter (DVOM) to system ground eyelet on cylinder head. Connect other lead to the following circuits, and test resistance: 14-Pin Connector: Black/White wire in connector cavity No. 2. Black wire in connector cavities No. 6 and 7. 60-Pin Connector: Black/White wire in connector cavity No. 5. Light Blue/Red wire in connector cavities No. 15 and 16. (Scheme 171): Testing Resistance at 14 & 60-Pin Connectors
17. If the ohmmeter displays less than.5 ohm resistance at all cavities, proceed to «DR15»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) (cold engine driveability problems) or «DR17»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr17-checking-for-fuel-fouled) (warm engine driveability problems). If ohmmeter reading indicates an open in one or more of the connector cavities, check for an open ground circuit and/or replace SMEC. If meter indicates a resistance greater than.5 ohms, repair ground connection.
18. Turbo Only - Connect DRB II and disconnect fuel injector connectors (4). Put system in ATM "02" and connect and disconnect each injector, one at a time. If injector clicks, go to next step. If injector does not click, replace injector.
19. On all engines, the majority of intermittent failures are caused by wiring and connections. One way to find them is to duplicate the problem. Since the SMEC can remember where they are, the ATM and Sensor Tests can be used in an attempt to locate them. Once in the correct test mode, wiggle all connectors and wires in the circuit. The DRB II display will change, or ATM test will be interrupted when the bad connection or wire is located. When checking the MAP sensor circuit (code "14"), apply 10 inches of vacuum to MAP sensor before testing. If the following codes do not reappear, go to the indicated test: Sensor Tests Code 14 - Test "08" Code 22 - Test "04" Code 23 - Test "03" Code 24 - Test "05" ATM Tests Code 25 - Test "03" Code 26 - Test "02" Code 27 - Test "02" Code 31 - Test "07" Code 33 - Test "05" Code 35 - Test "04" Code 36 - Test "11" Code 37 - Test "10" Code 42 - Test "06" Code 43 - Test "01" Code 45 - Test "11"

Scheme 172

1. Turn ignition off. Tee vacuum gauge into vacuum line at MAP sensor. Start engine and observe vacuum gauge with engine at idle. Observe gauge while snapping throttle open and closed. If gauge reads manifold vacuum at idle and drops to zero when throttle is snapped open, go to next step. If vacuum reads zero at idle, repair leak in vacuum line to throttle body. If vacuum slowly drops to zero when throttle is snapped open, repair restriction in vacuum supply line to MAP sensor. (Scheme 172): MAP Sensor Vacuum Gauge Connection
2. Connect DRB II and disconnect MAP sensor connector. Put system into Sensor Test Mode "08". If display reads zero volts, replace SMEC, see NOTE below. If reading is at least 4 volts, SMEC is okay, go to next step. NOTE: Before replacing SMEC, ensure wire to Dark Green/Red wire of connector cavity No. 1 (Turbo), of 60-pin connector, is not shorted to ground.
3. Connect DRB II and put system in Sensor Test Mode "08". Disconnect MAP sensor. Connect jumper wire to Dark Green/Red wire and Black/Light Blue wire of the MAP sensor harness connector. If DRB II displays "0" volts, go to step 5). If reading is not "0" volts, go to next step.
4. Connect DRB II and put system in Sensor Test Mode "08". Disconnect MAP sensor. Connect a jumper between battery negative terminal and Dark Green/Red wire at MAP sensor harness connector. If display is "0" volts, repair Black/Light Blue wire of the MAP sensor connector to the wiring harness splice. If display is "5" volts, repair Dark Green/Red wire of the MAP sensor connector for an open circuit to SMEC.
5. Disconnect MAP sensor connector and turn ignition switch to "RUN" position. Connect a DVOM between Voilet/White wire of MAP sensor harness and ground. If it reads zero volt, repair open in Voilet/White wire. If reading is at least 4 volts, replace MAP sensor.

Note. Before replacing MAP sensor, check terminals in harness connector to make sure they are not defective causing poor connection.

MAP Sensor DVOM Connection. Scheme 173

Scheme 174

Scheme 175

1. Connect DRB II. Start engine. Disconnect speed sensor connector. Put system into Engine Running Test "71". Connect jumper wire between the Black and White/Orange terminals of speed sensor. Make and break this connection. If display on DRB II, replace speed sensor. If display does not change, go to next step.
2. Turn engine off and disconnect speed sensor. Disconnect 60-pin connector from SMEC. Connect an ohmmeter between White/Orange wire at cavity No. 48 of 60-pin connector and White/Orange wire at speed sensor harness connector. If ohmmeter reads continuity, go to next step. If ohmmeter is not reading continuity, repair White/Orange wire in cavity No. 48 of 60-pin connector for an open circuit to speed sensor connector. (Scheme 174): Jumpering Speed Sensor (Scheme 175): Connection Between Speed Sensor & 60-Pin Connection.
3. With engine off, disconnect speed sensor and 60-pin SMEC connector. Connect an ohmmeter between Black/Light Blue wire at cavity No. 4 of 60-pin connector and Black wire terminal of speed sensor harness connector. If ohmmeter reads continuity, replace SMEC. Before replacing SMEC, ensure cavity No. 48 is not damaged causing a poor connection. If ohmmeter is not reading continuity, repair Black/Light Blue or Black wire of speed sensor harness connector for an open circuit to wiring harness splice.

DR4, CODE 21 - OXYGEN SENSOR (O2) CIRCUIT

1. Turn ignition off, connect DRB II and disconnect (O2) sensor connector. Turn ignition on. Put system in Sensor Test "02". If display on tester is at least .4 volt, go to next step. If display on tester reads zero volts, replace SMEC. Before replacing SMEC, ensure Black/Dark Green wire at cavity No. 23 of SMEC 60-pin connector is not shorted to ground.
2. With system in Sensor Test "02" and O2 sensor disconnected, connect one end of a jumper wire to Black/Dark Green wire of oxygen sensor harness connector. Connect other end to battery positive post. If display on tester reads at least 5 volts, replace O2 sensor. If display on tester reads .4 volt, repair Black/Dark Green wire of O2 sensor connector for an open circuit to SMEC.

Jumpering O2 Sensor Connector. Scheme 176

Scheme 177

Scheme 178

1. With DRB II connected to diagnostic connector, turn ignition off. Disconnect CTS sensor connector. Put system in Sensor Test "04". If display on tester reads "00°", go to next step. If display on tester reads "260°", replace SMEC for a defective logic board. Before replacing SMEC, ensure Tan/White wire at cavity No. 3 of 60-pin connector is not shorted to ground. (Scheme 177): Disconnecting Coolant Temperature Sensor
2. Connect a jumper wire between Tan/White and Black/Light Blue wire terminals of CTS. If display on tester reads "260°", replace CTS. If display on tester reads "00°", go to next step. (Scheme 178): Jumpering CTS Tan/White & Black/Light Blue Wires
3. With DRB II connected and system in Sensor Test "04", disconnect CTS. Connect one end of a jumper wire to ground. Connect other end of wire to Tan/White wire terminal of CTS harness connector. If display on tester reads "260°", repair Black/Light Blue wire of CTS harness connector for an open circuit to wiring harness splice. If display on tester reads "00°", repair Tan/White wire of CTS harness connector for an open circuit to SMEC.

Jumpering CTS to ground. Scheme 179

DR6, CODE 23 - CHARGE TEMP SENSOR

Note. Some vehicles made in Mexico do not have air charge temperature sensor. There is a fixed 69° signal given to the PCM so there is always an air charge code in memory. On vehicles without air charge temperature sensor, there is no diagnostic information available from manufacturer.

Scheme 180

1. With DRB II connected to diagnostic connector, disconnect throttle body/charge temperature sensor connector. Put system in Sensor Test "03". If display on tester reads 5 volts, go to next step. If display on tester reads zero volts, or zero volts and then increases, replace SMEC. Before replacing SMEC, ensure cavity No. 21 of 60-pin connector is not shorted to ground. (Scheme 180): Testing Charge Temperature Sensor
2. With DRB II connected and system in Sensor Test "03", connect a jumper wire between Black/Red and Black/Light Blue wire terminals of throttle body/charge temperature sensor harness connector. If display on tester reads zero volts, replace throttle body temperature sensor. If display on tester reads 5 volts, go to next step.
3. Connect one end of a jumper wire to ground. Connect other end of wire to Black/Red wire terminal of throttle body/charge temperature sensor connector. If display reads zero volts, repair Black/Light Blue wire of throttle body/charge temperature sensor connector for an open circuit to wiring harness splice. If display on tester reads 5 volts, repair wire of throttle body temperature sensor connector for an open circuit to SMEC.

Scheme 181

Scheme 182

1. With tester connected to diagnostic connector and TPS sensor disconnected, put system in Sensor Test "05". If display on tester reads between 4-5 volts, go to next step. If display on tester reads zero volts, replace SMEC for a defective logic board. Before replacing SMEC, ensure Orange/Dark Blue wire at connector cavity No. 22 of 60 pin connector is not shorted to ground.
2. Connect a jumper wire between Orange/Dark Blue and Black/Light Blue wire terminals of TPS connector. If display on tester reads zero volts, go to step 4). If display on tester reads 5 volts, go to next step. (Scheme 181): Jumpering Throttle Position Sensor Violet/White
3. Connect one end of a jumper wire to ground. Connect other end of wire to Orange/Dark Blue wire terminal of TPS harness connector. If display on tester reads zero volts, repair Black/Light Blue wire of TPS connector for an open circuit to wiring harness splice. If display on tester reads 5 volts, repair Orange/Dark Blue wire of TPS connector for an open circuit to SMEC. (Scheme 182): Jumpering TPS to Ground
4. With TPS disconnected, turn ignition switch to "RUN" position. Connect a digital voltmeter between Voilet/White wire of TPS harness connector and ground. If voltmeter reads at least 4 volts, replace TPS. If voltmeter reads zero volts, repair Voilet/White wire for an open circuit to wiring harness splice.

Testing TPS Voltage. Scheme 183

Scheme 184

1. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect an ohmmeter between Brown/White wire in connector cavity No. 17 and Yellow/Black wire in cavity No. 18. If ohmmeter reads some resistance (amount of resistance is not important), go to next step. If ohmmeter reading indicates circuit is open, go to step 3). (Scheme 184): Testing Cavity 17 to 18 Resistance
2. Connect an ohmmeter between Gray/Red wire in connector cavity No. 19 and Voilet/Black wire in connector cavity No. 20 of 60 pin connector. If ohmmeter reads some resistance (amount of resistance is not important), replace SMEC for a defective logic board. If ohmmeter reads no continuity, go to next step.
3. Connect ohmmeter as in steps 1) or 2). Disconnect Idle Speed Control (ISC) motor connector. If ohmmeter reading indicates an open circuit, replace ISC motor. If ohmmeter shows continuity, repair wire to ISC motor for a short circuit to each other.

Scheme 185

Scheme 186

1. Connect a voltmeter between Pink/Black wire of canister purge solenoid connector and ground. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero volts, go to step 3). (Scheme 185): Testing Connector Purge Solenoid Connector Voltage
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between Pink/Black wire in connector cavity No. 54 and ground. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, replace SMEC. Before replacing SMEC, ensure connector cavity No. 54 is not damaged causing a poor connection. If voltmeter reads zero volts, repair Pink/Black wire in connector cavity No. 54 for an open circuit to canister purge solenoid. (Scheme 186): Testing Cavity 54 Voltage
3. Turn ignition switch to "RUN" position. Connect a voltmeter between Dark Blue wire of canister purge solenoid and ground. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero volts, repair Dark Blue wire for an open circuit to wiring harness splice.
4. Turn ignition off. Connect a voltmeter between Pink/Black wire at canister purge solenoid connector and ground. Disconnect 60 pin connector from SMEC. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, replace SMEC. Before replacing SMEC, ensure Pink/Black wire is not shorted to ground. If voltmeter reads zero volts, replace canister purge solenoid.

Scheme 187

Scheme 188

1. Connect a voltmeter to Dark Blue/Pink wire of radiator fan relay 3-pin connector and ground. Turn ignition on. If voltmeter reads battery voltage, go to next step. If voltmeter reads 0-1 volt, go to step 3). (Scheme 187): Testing Radiator Fan Relay Voltage
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between Dark Blue/Pink wire in cavity No. 57 and ground. Turn ignition on. If voltmeter reads battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, ensure cavity No. 57 of 60-pin connector is not damaged causing a poor connection. If voltmeter reads zero volts, repair Dark Blue/Pink wire of cavity No. 57 for an open circuit to radiator fan relay. (Scheme 188): Testing Cavity 57 Voltage
3. With voltmeter connected as in step 1), turn ignition off. Disconnect 60-pin connector from SMEC. Turn ignition on. If voltmeter reads battery voltage, logic board is defective, replace SMEC. If voltmeter reads zero volts, go to next step.
4. Connect voltmeter to Dark Blue wire of radiator fan relay single connector and ground. If voltmeter reads zero volts, repair Dark Blue wire of radiator fan relay for an open circuit to wiring harness splice.

Scheme 189

Scheme 190

1. Connect a voltmeter to Light Green/Black wire of Wastegate solenoid connector and ground. Turn ignition on. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero, proceed to step 3). (Scheme 189): Testing Wastegate Solenoid Voltage
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect voltmeter to Light Green/Black wire in cavity No. 39 of the 60-pin connector and vehicle ground. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, replace SMEC. Before replacing the SMEC, check terminal in cavity No. 39 for damage. If voltmeter does not read battery voltage, repair open in Light Green/Black wire. (Scheme 190): Testing Cavity 39 Voltage
3. Turn ignition switch to "RUN" position. Connect voltmeter between the Dark Blue wire at the wastegate solenoid connector and vehicle ground. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero volts, repair open in Dark Blue wire between wastegate connector and wiring harness splice.
4. Turn ignition off. Connect voltmeter between Light Blue/Black wire of the wastegate solenoid connector and vehicle ground. Disconnect 60-pin connector from SMEC. Turn ignition on. If voltmeter reads battery voltage, logic board is defective, replace SMEC. If voltmeter reads zero volts, replace wastegate solenoid.

Scheme 191

Scheme 192

1. Connect voltmeter between Light Blue wire of the baro read solenoid connector and vehicle ground. Turn ignition on. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero volts, go to step 3), (Scheme 191): Testing Baro Read Solenoid Connectors Voltage
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect voltmeter between Light Blue wire in cavity No. 38 of the 60 pin connector and vehicle ground. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, replace SMEC. Before replacing SMEC, ensure terminal in cavity No. 38 is not damaged, causing a poor connection. If voltmeter reads zero volts, repair open in Light Blue wire. (Scheme 192): Testing Cavity 38 Voltage
3. Connect voltmeter between Dark Blue wire of baro read solenoid connector and vehicle ground. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero volts, repair open in Dark Blue wire.
4. Turn ignition off. Connect voltmeter between Light Blue wire at baro read connector and vehicle ground. Disconnect 60-pin connector from SMEC. Turn ignition switch to "RUN" position. If voltmeter reads battery voltage, logic board is defective, replace SMEC. Before replacing SMEC, ensure Light Blue wire is not shorted to ground. If voltmeter reads zero volts, replace the baro read solenoid.

DR14 CODE 44 - FUSED "J2" CIRCUIT TO SMEC

Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter to Dark Blue/White wire in cavity No. 12 of the 60-pin connector and ground. Turn ignition on. If voltmeter reads battery voltage, logic board is defective, replace SMEC. Before replacing SMEC, ensure terminal in cavity No. 12 of 60-pin connector is not damaged causing a poor connection. If voltmeter reads zero volts, repair Dark Blue/White wire of cavity No. 12 for an open circuit to wiring harness splice.

Testing Cavity 12 Voltage. Scheme 193

Scheme 194

1. Disconnect vacuum line from wastegate diaphragm. Connect vacuum gauge to vacuum line that was removed. Disconnect vacuum line from the side of the wastegate solenoid and connect vacuum pump to it. Apply 15 in. Hg vacuum. Release vacuum. If vacuum gauge reads within one in. Hg of applied vacuum and drops to zero immediately when vacuum is released, system is okay, go to next step. If vacuum gauge does not read within one in. Hg of applied vacuum or drops slowly to zero, repair vacuum line for restriction or break. (Scheme 194): Vacuum Connections to Wastegate & Solenoid
2. Disconnect vacuum line connector from top of wastegate solenoid and connect vacuum gauge to it. Start engine. If vacuum gauge reads manifold vacuum, check wastegate and sensor calibration. If vacuum gauge reads zero. repair vacuum line to manifold for restriction or break.

Vacuum Supply to Wastegate Solenoid. Scheme 195

Scheme 196

1. Coolant Temperature Sensor - Connect DRB II Tester (C-4805) to diagnostic connector. With a COLD engine, put system in Engine Running Test "64". If display on tester is reading ambient temperature +/-10°F (12.2°C), go to next step. If display on tester is reading more than 10°F (12.2°C) greater than or less than ambient temperature, replace coolant temperature sensor.
2. Throttle Position Sensor - With a COLD engine, put system in Sensor Test "05". If display on tester reads.5-1.5 volts with throttle fully closed and at least 3.5 volts at WOT, and voltage changes steadily during throttle movement, TPS is okay. Go to next step. If voltage readings are not within specifications, replace TPS.
3. Start engine. Put system in Engine Running Test "65". Slowly increase engine speed to 2000 RPM. If voltage displayed on tester increases with engine speed, go to next step. If voltage does not increase as engine speed increases, replace TPS.
4. With engine running at idle, put system in Engine Running Test "69". If display on tester is between 0-.1 volt, go to next step. If display on tester is reading more than.1 volt, replace TPS.
5. Map Sensor - Turn engine off. Tee a vacuum gauge into vacuum line at MAP sensor. Start engine. Put system in Engine Running Test "68". If vacuum displayed on tester is within one in. Hg of vacuum shown on vacuum gauge, go to step 8) on Turbo II models or «DR17»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr17-checking-for-fuel-fouled) on Turbo I models. If vacuum displayed on tester is not within one inch of vacuum shown on vacuum gauge, go to next step. (Scheme 196): Connecting Vacuum Gauge to MAP Sensor
6. With COLD engine, put system in Sensor Test "08". Disconnect vacuum hose from MAP sensor. Connect a vacuum pump to MAP sensor. Apply 5 in. Hg vacuum to sensor and record voltage displayed on tester. Slowly apply 20 in. Hg vacuum to sensor and record voltage displayed on tester. Subtract voltage readings recorded at 20 in. Hg vacuum from readings recorded from 5 in. Hg vacuum. Record result.
7. If tester is showing an uninterrupted change of voltage between 5 and 20 in. Hg vacuum and voltage difference is between 2.3-2.9 volts, repair vacuum line to MAP sensor for a restriction. If tester is showing an interrupted change of voltage between 5 and 20 in. Hg vacuum and voltage difference is not between 2.3-2.9 volts, replace MAP sensor.
8. Charge Temperature Sensor (Turbo II Only) - Connected diagnostic connector to COLD engine. Start engine. Put system in Engine Running Test "63". If display on tester reads between 3-5 volts, charge temperature sensor is okay. Go to «DR17»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr17-checking-for-fuel-fouled). If display on tester is not reading between 3-5 volts, replace charge temperature sensor.

DR17 - CHECKING FOR FUEL FOULED SPARK PLUGS

1. Remove spark plugs. If spark plugs are dry, go to next step. It is normal for spark plugs to be Black after starting a cold engine. If spark plugs are wet with fuel, clean plugs and reinstall. DO NOT replace spark plugs. Check for fuel in crankcase. Change oil and filter if required.
2. With engine cold, disconnect air duct from air cleaner snorkel. Disconnect vacuum supply hose from the heated air intake temperature sensor. Connect an auxiliary vacuum supply to temperature sensor. Apply 15 in. Hg. vacuum. If vacuum builds up, closes heated air door and then bleeds down, go to the following driveability tests: Federal vehicles, see: «DR18»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) California vehicle, see: «DR19»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr19-secondary-ignition-system-check)

Scheme 197

1. Coolant Temperature Sensor - Connect DRB Tester (C-4805) to diagnostic connector. With a WARM engine, put system in Engine Running Test "64". If display on tester reads between 180-250°F (82-121°C), go to next step. If display on tester is not reading between 180-250°F (82-121°C), replace coolant temperature sensor.
2. Throttle Position Sensor - With a WARM engine, put system in Sensor Test "05". If display on tester reads.5-1.5 volts with throttle fully closed and at least 3.5 volts at WOT, and voltage changes steadily during throttle movement, TPS is okay. Go to next step. If voltage readings are not within specifications, replace TPS.
3. Start engine. Put system in Engine Running Test "65". Slowly increase engine speed to 2000 RPM. If voltage displayed on tester increases with engine speed, go to next step. If voltage does not increase as engine speed increases, replace TPS.
4. With engine running at idle, put system in Engine Running Test "69". If display on tester is between 0-.1 volt, go to next step. If display on tester is reading more than.1 volt, replace TPS.
5. Map Sensor - Turn engine off. Tee a vacuum gauge into vacuum line at MAP sensor. Start engine. Put system in Engine Running Test "68". If vacuum displayed on tester is within one inch of vacuum shown on vacuum gauge, go to step 8). If vacuum displayed on tester is not within one in. Hg of vacuum shown on vacuum gauge, go to next step. (Scheme 197): Connecting Vacuum Gauge to MAP Sensor
6. With WARM engine, put system in Sensor Test "08". Disconnect vacuum hose from MAP sensor. Connect a vacuum pump to MAP sensor. Apply 5 in. Hg vacuum to sensor and record voltage displayed on tester. Slowly apply 20 in. Hg vacuum to sensor and record voltage displayed on tester. Subtract voltage readings recorded at 20 in. Hg vacuum from readings recorded from 5 in. Hg vacuum. Record result.
7. If tester is showing an uninterrupted change of voltage between 5 and 20 in. Hg vacuum and voltage difference is between 2.3-2.9 volts, repair vacuum line to MAP sensor for a restriction. If tester is showing an interrupted change of voltage between 5 and 20 in. Hg vacuum and voltage difference is not between 2.3-2.9 volts, replace MAP sensor.
8. Charge Temperature Sensor (Turbo II Only) - With tester connected to diagnostic connector on a WARM engine. Start engine. Put system in Engine Running Test "63". If display on tester reads between 1-4 volts, throttle body temperature sensor is okay, go to «DR19»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr19-secondary-ignition-system-check). If display on tester is not reading between 1-4 volts, replace throttle body temperature sensor.

DR19 - SECONDARY IGNITION SYSTEM CHECK

Connect engine analyzer to engine. Start engine and allow engine speed to stabilize for 2 minutes. Following equipment manufacturer's instructions, test secondary ignition system. Ensure ignition coil output is checked during this test. If secondary ignition system is okay, perform DR20 . If secondary ignition system does not test okay, repair as required.

Scheme 198

1. Connect a tachometer and powered timing light to engine. Start and run engine until normal operating temperature is obtained. Disconnect engine coolant temperature sensor. The "CHECK ENGINE" light must come on. If basic timing is within 2 degrees of specification shown on emission label, go to next step. If basic timing is not within specification, adjust timing. (Scheme 198): Disconnect/Reconnect CTS
2. Remove air cleaner if necessary. Ensure engine is at normal operating temperature. Reconnect coolant temperature sensor. The "CHECK ENGINE" light will not go out until engine is restarted. Raise engine speed to 2000 RPM. If timing is between 25-35 degrees BTDC, go to «DR21»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr21-fuel-supply-return). If ignition timing is not within minimum specification, logic board is defective, replace SMEC.

DR21 - FUEL SUPPLY & RETURN SYSTEM CHECK

Scheme 199

Scheme 200

1. With the DRB II connected to the diagnostic connector, install Pressure Gauge (C-3292) with Adapter (C-4799) in the fuel supply hose at the fuel rail. Enter into Diagnostic Test Mode. Press and hold "ATM" key on tester. If fuel pressure is 13.5-15.5 psi, go to «DR24»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__dr24-non-engine-control-related-problems). If fuel pressure is less than 13.5 psi, record reading and go to next step. If fuel pressure is more than 15.5 psi, go to step 4). (Scheme 199): Checking Fuel Pressure
2. Turn ignition off. Release fuel system pressure. Remove pressure gauge and adapter. Reinstall hose to throttle body. Tee pressure gauge into fuel line before fuel filter. Turn ignition on. Press and hold "ATM" key on tester. If fuel pressure is 5 psi higher than in step 1), replace fuel filter. If fuel pressure is still less than 13.5 psi, go to next step. (Scheme 200): Installing Pressure Gauge
3. Turn ignition off. Release fuel system pressure. Remove pressure gauge. Tee pressure gauge into line after fuel filter. Turn ignition switch to "RUN" position. Press and hold "ATM" key on tester. VERY GENTLY squeeze fuel return line at fuel rail and IMMEDIATELY release. Fuel pressure must not exceed 25 psi or damage to pressure regulator will result. If fuel pressure increases to more than operating pressure, replace pressure regulator. If fuel pressure does not increase, replace in-tank fuel pump. Before replacing in-tank fuel pump, look for contamination in fuel tank that may be plugging pump filter. Also ensure electrical connections are not corroded.
4. Turn ignition off. With pressure gauge connected, remove fuel return hose (small one) from fuel rail. Connect a 3 foot length of fuel hose to fuel rail and place other end of hose into a receptacle (2 gallon minimum). Turn ignition on. Press and hold "ATM" key on tester. If fuel pressure is 47-49 psi, check fuel return lines for kinks or restrictions, including return line check valve inside fuel tank. If fuel pressure is more than 49 psi, replace pressure regulator.

DR24 - NON-ENGINE CONTROL RELATED PROBLEMS

At this point in driveability testing procedures, all engine control systems have been determined to be operating properly. Therefore, engine control system devices are not the cause of the driveability problem. Check the following items as possible causes of driveability problem

1. Engine vacuum MUST be at least 13 in. Hg in Neutral.
2. Valve timing must be set to specifications.
3. Engine compression must be within specifications.
4. Engine exhaust system must be free of restrictions.
5. Engine PCV system must flow freely.
6. Ensure engine drive sprockets (camshaft and crankshaft) are properly installed, meshed and timed.
7. Torque converter stall speed must be within specifications.
8. Power brake booster must not have any internal vacuum leaks.
9. Fuel must not be contaminated (high alcohol and water content).
10. Crossed fuel injector control wires (wrong wire connected to injector) may cause rough idle.

Any one or more of these conditions can cause a driveability related problem. They must be considered as possible causes.

CHARGING SYSTEM TEST INFORMATION

Because of the limited space available for titles in this product, CHARGING SYSTEM test titles have been shortened to CH. This allows more useable information to display in the option menu.

Scheme 201

1. Connect DRB II to diagnostic connector. Enter Diagnostic Test Mode. Record all codes. If fault code 47 is stored, check for a loose fan belt. Check battery and alternator output.
2. Turn ignition off. Erase all fault codes. Start the engine and let it idle for 7 minutes. Increase engine speed to 1500 RPM for 30 seconds. Stop engine. Enter into Diagnostic Test Mode. Record all codes.
3. If code(s) were not stored after memory was cleared, problem no longer exists. Go to step 6). If same code(s) were stored before and after memory was cleared, problem still exists.
4. If code 88-12-55 is stored, proceed to «CH2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ch2-checking-battery-temp-sensor). If code 88-12-16-55 is stored, proceed to «CH3»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes__ch3-code-16-battery-voltage). If codes 88-12-41-46-55 or 88-12-46-55 are stored, proceed to «CH4»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes).
5. If codes 88-12-41-55, 88-12-41-47-55 or 88-12-47-55 are stored, proceed to «CH5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes). If there is no code 88, ensure diagnostic readout box is operating properly and that there is not an open circuit between SMEC and DRB II diagnostic connector. (Scheme 201): DRB II Tester (C-4805)
6. Connect DRB II as in previous steps. If code 16 or 41 appeared before fault codes were erased in step 2), fault is intermittent. Enter ATM Test Mode "09" for code 41 or ATM Test Mode "07" for code 16. Connect voltmeter to the field control wire of alternator. Wiggle wires and connectors in charging circuit while observing voltage pulsations on voltmeter. When voltage pulsates while a circuit is being wiggled, this indicates an intermittent fault. Repair wire and/or connector. Retest circuits.

CH2 - CHECKING BATTERY TEMP SENSOR CALIBRATION

1. Connect DRB II to diagnostic connector. Put system in Engine Running Test Mode "61". If DRB II display is between .2-3.0 volts, go to next step. If DRB II display is not between .2-3.0 volts, logic board is defective, replace SMEC.
2. Put system in Engine Running Test Mode "67". If DRB II display is between 13-15 volts, Check condition of battery. Check for battery drain condition. If display on DRB II is not between 13-15 volts, check alternator for low output.

CH3, CODE 16 - BATTERY VOLTAGE SENSING CIRCUIT

1. Disconnect 60-pin SMEC connector. Connect voltmeter between cavity No. 41 (Red Wire) and vehicle ground.
2. If display is within one volt of battery voltage, logic board is defective, ensure terminal in cavity No. 41 is not damaged, causing a poor connection. If terminal is okay, replace SMEC. If display reads zero volts, repair open in Red wire.

Checking Cavity 41 Voltage. Scheme 202

Scheme 203

Scheme 204

1. Disconnect 14-pin connector from SMEC. Separate the 14-pin connector halves. Reconnect the half of connector containing cavities No. 1-7 to SMEC. Using an analog voltmeter, connect positive lead to cavity No. 14 (Dark Green wire). Connect negative lead to cavity No. 11 (Dark Green/Orange wire). Enter ATM Test Mode "09". (Scheme 203): Checking Cavity 11 to 14 Voltage
2. If voltmeter reading pulsates between 0-12 volts, check terminals in cavities No. 11 and 14 for damage. If terminals are not damaged, power board is defective, replace SMEC. If voltmeter reads zero volts, go to next step.
3. Turn ignition switch to "RUN" position. Connect positive lead of analog voltmeter to cavity No. 14 (Dark Green wire). Connect negative lead to vehicle ground. If voltmeter reads battery voltage, go to next step. If voltmeter reads 0-1 volt, repair short in alternator field circuit. (Scheme 204): Testing Cavity 14 Voltage
4. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect an ohmmeter between cavity No. 14 (Dark Green wire) of 60-pin connector and ground. If ohmmeter reads no continuity, check terminal in cavity No. 14 for damage. If terminal in cavity No. 14 is okay, logic board is defective, replace SMEC. If ohmmeter shows continuity, repair short from cavity No. 14 (Dark Green wire) to ground.

Testing Cavity 14 Voltage. Scheme 205

Scheme 206

1. Connect DRB II to diagnostic connector. Connect negative lead of voltmeter to battery ground. Enter ATM Test Mode "09". Connect positive lead to each of the alternator field terminals.
2. If voltmeter reads zero volts at both terminals, repair open in Dark Blue wire. If voltmeter reads battery voltage at one terminal and pulsates between 0-12 volts at other terminal, check alternator drive belt for looseness. Check condition of battery and alternator. If voltmeter reads battery voltage at both terminals, go to next step.
3. Turn ignition off. Disconnect 14-pin connector from SMEC. Separate 14-pin connector halves. Connect voltmeter between cavity No. 14 (Dark Green wire) and vehicle ground. Turn ignition switch to "RUN" position.
4. If voltmeter reads battery voltage, go to next step. If voltmeter reads zero voltage, repair open in Dark Green wire. (Scheme 206): Grounding Cavity 14
5. Turn ignition switch to "OFF" position. Reconnect the half of connector containing cavities No. 1-7 to SMEC. Connect ohmmeter between cavity No. 11 (Dark Green/Orange wire) of 14-pin connector and cavity No. 14 (Dark Green/Orange wire) of 60-pin connector.
6. If ohmmeter shows continuity, check terminal in cavity No. 14 of 60-pin connector for damage. If terminal in cavity No. 14 of 60 pin connector is not damaged, logic board is defective, replace SMEC. If no continuity, repair open in Dark Green/Orange wire.

Measuring Resistance Between Cavities 14 & 11. Scheme 207

CRUISE CONTROL SYSTEM TEST INFORMATION

Because of the limited space available for titles in this product, CRUISE CONTROL SYSTEM test titles have been shortened to CC. This allows more information to be displayed in the menu.

CC1 - CRUISE CONTROL SYSTEM CODE CHECK

1. Connect DRB II Tester (C-4805) to diagnostic connector. Put system in Diagnostic Test Mode. Record all codes. If codes 88-55 or 88-12-55 are displayed (no fault codes), go to next step. If codes 88-34-55 or 88-12-34-55 are displayed (cruise control servo), go to «CC2»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If codes 88-15-55 or 88-12-15-55 are displayed (speed sensor), go to «DR3»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) .
2. Put the system into Sensor Test "09". Ensure cruise control switch is in "OFF" position. While observing tester, move cruise control switch to "ON" position. Press "SET" button. Move cruise control switch to 'RESUME" position. Record display on tester.
3. If tester displayed "00" with cruise control on, "10" with "SET" button pressed, and "01" with cruise control switch moved to "RESUME" position, go to «CC3»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If tester displayed blank with cruise control on blank with "SET" button pressed, and blank with cruise control switch moved to "RESUME" position, go to «CC4»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If tester displayed blank with cruise control on, "10" with "SET" button pressed, and "10" with cruise control switch moved to "RESUME" position, go to «CC5»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) . If tester displayed "00" with cruise control on "00" with "SET" button pressed, and "00" with cruise control switch moved to "RESUME" position, go to «CC6»(/dodge/daytona/i-1984-1993/remont/testing-diagnostics/#22l-turbo-tests-wcodes) .

Cruise Control Switch Positions. Scheme 208

Scheme 209

Scheme 210

Scheme 211

Scheme 212

Scheme 213

1. With the tester connected, connect a voltmeter to the Tan/Red wire of cruise control servo harness connector. Connect the other voltmeter lead to ground. Put system into the ATM Test "08". Turn cruise control switch to "ON" position. If voltmeter is pulsating between 0-12 volts, go to next. If voltmeter reads battery voltage, go to step 5). If voltmeter reads between 0-1 volt, go to step 6) (Scheme 209): Testing Cruise Control Sensor Voltage
2. Turn ignition off. Connect a voltmeter between Light Green/Red wire at cruise control servo harness connector and ground. Turn ignition on. Turn cruise control on. If voltmeter reads battery voltage, go to next step. If voltmeter reads 0-1 volt, go to step 4).
3. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between Light Green/Red wire in cavity No. 60 and ground. Turn ignition on. If voltmeter reds within one volt of battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, ensure terminal in cavity No. 60 of 60-pin connector is not damaged causing a poor connection. If voltmeter reads between 0-1 volt, repair wire in cavity No. 60 for and open circuit to cruise control servo connector. (Scheme 210): Testing Launch 60 voltage
4. With voltmeter connected as in step 2), disconnect 60-pin connector from SMEC. Turn ignition on. If voltmeter reads battery voltage, replace SMEC for a bad logic board. If voltmeter reds between 0-1 volt, repair Light Green/Red wire of cavity No. 60 for a short to ground from the SMEC to cruise control servo connector.
5. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between Tan/Red wire in cavity No. 53 and ground. Turn ignition on. If voltmeter reads battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, ensure cavity No. 53 of 60 pin connector is not damaged causing a poor connection. If voltmeter reads zero volts, repair Tan/Red wire of cavity No. 53 for an open circuit to cruise control servo connector. (Scheme 211): Testing Cavity 53 voltage
6. With voltmeter connected as is step 1), disconnect 60-pin connector from SMEC Turn ignition. If voltmeter reads battery voltage, replace SMEC for a bad logic board. If voltmeter reads between 0-1 volt, go to next step. (Scheme 212): Testing Cruise Control Servo Voltage
7. With cruise control switch in "ON" position, turn ignition off. Connect a voltmeter between Dark Blue/Red wire of cruise control servo connector and ground. Turn ignition on. If voltmeter reads battery voltage, replace cruise control servo. If voltmeter still reads between 0-1 volt, go to next step.
8. With cruise control and ignition on. Connect a voltmeter between Dark Blue/Red wire of brake switch harness connector and ground. If voltmeter reads battery voltage, repair Dark Blue/Red wire for an open circuit to cruise control servo. If voltmeter still reads between 0-1 volt, go to next step. (Scheme 213): Testing Brake Switch Harness Connector Voltage
9. Connect a voltmeter between Yellow/Red wire of brake switch harness connector and ground. If voltmeter reads battery voltage, check brake switch adjustment. If brake switch adjustment is okay, replace brake switch. If voltmeter reds zero volts, repair Yellow/Red wire for an open circuit to wiring harness splice. Make sure fuse for Yellow/Red wire is not blown.

Scheme 214

Scheme 215

Scheme 216

1. Turn ignition off. Disconnect cruise control servo connector. Connect an ohmmeter between Black wire of cruise control servo connector and ground. If ohmmeter is reading continuity, go to next step. If ohmmeter reads no continuity, repair Black wire for an open circuit to wiring harness splice. (Scheme 214): Testing Cruise Control Servo Connector Continuity
2. With tester connected to diagnostic connector, put system in Switch Test Mode. Press down on brake pedal. If display on tester changes as brake pedal was depressed (not important what display changes to, just ensure display changes), go to step 4). If display on tester did not change as brake pedal was depressed, go to next step.
3. Turn ignition off. Disconnect 60-pin connector. Connect an ohmmeter between White/Pink wire in cavity No. 29 and ground. Press down on brake pedal and then release. If ohmmeter reads no continuity when brake pedal is pressed down and continuity when brake pedal is released, replace SMEC for a bad logic board. Before replacing SMEC, ensure cavity No. 29 of 60-pin connector is not damaged causing a poor connection. If ohmmeter does not indicate as described, check White/Pink wire of cavity No. 29 for an open circuit through stoplight bulb circuit through stoplight bulb circuit to ground. (Scheme 215): Testing Cavity 29 Continuity
4. While observing display on tester, put gear selector in Park, Reverse, Neutral, and Drive. if display on tester changes as gear selector is moved, go to step 6). If display on tester did not change when gear selector was moved, go to next step.
5. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect an ohmmeter between Brown/Yellow wire in cavity No. 30 and ground. Disconnect battery quick-disconnect. Turn ignition on. Observe ohmmeter while moving gear selector. If ohmmeter reads continuity in all positions, check Brown/Yellow wire of cavity No. 30 of 60-pin connector for a short to ground. Check for a bad neutral safety switch. If ohmmeter reads no continuity in all positions, repair Brown/Yellow wire of cavity No. 30 of 60-pin connector for an open circuit to neutral safety switch. If ohmmeter reads continuity in Park, no continuity in Reverse, continuity in Neutral, and no continuity in Drive (disregard resistance readings, just ensure there is continuity), replace SMEC for a bad logic board. Before replacing SMEC, ensure terminal in cavity No. 30 of 60-pin connector is not damaged causing a poor connection. (Scheme 216): Testing Cavity 30 Continuity
6. Connect cruise control servo connector. With tester connected, disconnect cruise control servo vacuum supply hose from brake booster and connect a vacuum pump to hose. Put system in ATM Test "08". Continuously apply vacuum to servo. If throttle is opening and closing a vacuum is being applied to cruise control servo, check vacuum supply to servo. Check speed sensor operation using Engine Running Test "71". Display on tester must remain stable. If display is not stable, replace speed sensor.
7. If throttle is not opening and closing as vacuum is applied to cruise control servo, replace the servo. Before replacing servo, ensure cruise control cable is properly adjusted and not damaged. Ensure vacuum supply hose is free of leaks and restrictions.

Connecting Vacuum Pump to Brake Booster. Scheme 217

Scheme 218

Scheme 219

1. Without disconnecting harness, connect a jumper wire between Dark Blue/Red and Yellow/Red wires of cruise control switch harness connection. If display reads "00", replace cruise control switch. If display on tester reads blank, go to next step. (Scheme 218): Jumpering Cruise Control Switch Connector
2. Turn ignition off. Without disconnecting connector, connect a voltmeter between Dark Blue/Red wire of cruise control switch harness connector and ground. Turn ignition on. If voltmeter reads within one volt of battery voltage, go to next step. If voltmeter reads zero volts, repair Dark Blue/Red wire for an open circuit to fuse box. (Scheme 219): Testing Cruise Control Switch Voltage
3. Turn ignition off. Disconnect 60-pin connector. Connect a voltmeter between Yellow/Red wire in cavity No. 8 and ground. Turn ignition on. If voltmeter reads battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, ensure terminal in cavity No. 8 of 60-pin connector is not damaged causing a poor connection. If voltmeter reads zero volts, repair Yellow/Red wire in cavity No. 8 for an open circuit to cruise control switch.

Testing Cavity 8 Voltage. Scheme 220

Scheme 221

1. With tester connected to diagnostic connector, put system in Sensor Test "09". Turn cruise control on. Without disconnecting connector, connect a jumper wire between Dark Blue/Red and Brown/Red wires of cruise control switch harness connector. If display on tester is "00', replace cruise control switch. If display on tester is "10", go to next step. (Scheme 221): Jumpering Cruise Control Switch Connector
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between Brown/Red wire in cavity No. 9 and ground. Turn ignition on. If voltmeter reads battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, check cavity No. 9 of 60-pin connector for an open circuit to cruise control switch. If voltmeter reads zero volts, repair Brown/Red wire of cavity No. 9 for an open circuit to cruise control switch.

Testing Cavity 9 Voltage. Scheme 222

Scheme 223

1. With tester connected to diagnostic connector, put system in Sensor Test "09". Turn cruise control on. Without disconnecting the connector, connect a jumper wire between White and White/Light Green wires of cruise control switch harness connector. If tester displays "01", replace cruise control switch. If display is "00", go to next step. (Scheme 223): Jumpering Cruise Control Switch Connector
2. Turn ignition off. Disconnect 60-pin connector from SMEC. Connect a voltmeter between White/Light Green wire in cavity No. 7 and ground. Turn ignition on. Move cruise control switch to "RESUME" position. If voltmeter reads battery voltage, replace SMEC for a bad logic board. Before replacing SMEC, check terminal in cavity No. 7 of 60-pin connector for an open circuit to cruise control switch. If voltmeter reads zero volts, repair White/Light Green wire in cavity No. 7 for an open circuit to cruise control switch.

Testing Cavity 7 Voltage. Scheme 224

Engine Control System Wiring Diagram (2.2L Turbo). Scheme 225

FUEL PRESSURE RELEASE

1. Fuel pressure must be fully released before opening fuel loop or removing any fuel carrying components. To release pressure in tank, open fuel tank cap slowly.
2. To release remaining pressure in system, disconnect 2-way connector from any fuel injector. Using jumper wire, connect either injector terminal to ground. Connect remaining injector terminal to positive battery terminal.
3. DO NOT keep injector connected in this way for more than 10 seconds. Fuel pressure should be fully released.

Removal & Installation

Remove air cleaner duct from SMEC. Remove battery and 2 module mounting bolts. Remove 14-pin and 60-pin wiring connectors from module. Remove module. To install, reverse removal procedure.

Remove air cleaner and disconnect negative battery cable. Disconnect 4-pin connector on AIS. Disconnect temperature sending unit from throttle body housing. Remove 2 Torx head screws and AIS motor from throttle body housing. Ensure "O" ring is removed with AIS motor. To install, reverse removal procedure. Ensure that pintle is in retracted position, measuring not more than 1" (25 mm).

Located on right fenderwell by the SMEC. Disconnect wiring harness from components. Remove attaching screws and component. To install, reverse removal procedure.

Remove vacuum hose and screws from sensor. Remove sensor from underhood, near firewall. To install, reverse removal procedure.

The oxygen sensor is located in exhaust manifold. Use Wrench (C-4589) to remove sensor. The threads in exhaust manifold must be cleaned with a tap prior to installation of sensor. If old sensor is being reinstalled, threads on sensor must be coated with anti-seize compound. Tighten sensor to 20 ft. lbs. (27 N.m).

Disconnect negative battery cable and remove air cleaner. Disconnect 3-pin connector at throttle position sensor. Remove 2 screws mounting throttle position sensor to throttle body. Lift throttle position sensor from throttle shaft and remove "O" ring. To install, reverse removal procedure.

Remove air cleaner and disconnect throttle cables from throttle body linkage. Remove 2 screws from throttle cable bracket and lay bracket aside. Disconnect wiring connector by pulling downward. Unscrew sensor. To install, reverse removal procedure.

See also:
• FUEL INJECTION SYSTEM - MULTI-POINT
• CH2
• CH3
• CH5
• DR2
• DR4
• DR6
• NS9
• DR14
• NS2
• NS6
• NS12
• NS4
• DR1
• NS17
• DR17
• DR21
• FUEL PRESSURE RELEASE