2000 CHRYSLER CARAVAN turn signal

After-Run- When fused ignition switch output is removed from the ECM cavity 47, the ECM
performs a self-diagnostic check in the following order:
1. Electrical shut-off test
2. Fuel quantity actuator test
3. Monitoring module test
4. Voltage regulator test
5. Main relay test (if tests 1-4 pass)
If any of tests 1-4 fail, the fault is stored in memory, and can be retrieved during the next ignition
cycle using the DRB.
3.2.3 Monitored Circuits
The ECM is able to monitor and identify most driveability related trouble conditions. Some circuits
are directly monitored through ECM feedback circuitry. In addition, the ECM monitors the voltage
state of some circuits and compares those states with expected values. Other systems are
monitored indirectly when the ECM conducts a rationality test to identify problems.
Although most subsystems of the powertrain control module are either directly or indirectly
monitored, there may be occasions when diagnostic trouble codes are not immediately identified.
For a trouble code to set, specific conditions must be met and unless these conditions are
encountered, a code will not set.
3.2.4 SKIS On-Board Diagnostics
The SKIS module has been programmed to transmit and monitor many different coded messages
as well as CCD Bus messages. This monitoring is called ``On-Board Diagnosis''.
Certain criteria must be met for a diagnostic trouble code to be entered into the Sentry Key
Immobilizer Module (SKIM) memory. The criteria may be a range of: input voltage, CCD Bus
messages, or coded messages to the SKIM. If all of the criteria for monitoring a circuit or function
are met and a fault is sensed, a diagnostic trouble code will be stored in the SKIM memory.
3.2.5 SKIS Overview
The Sentry Key Immobilizer System (SKIS) is an immobilizer system designed to prevent
unauthorized vehicle operation. The system consists of a Sentry Key Immobilizer Module (SKIM),
ignition key(s) equipped with a transponder chip, engine controller and body controller. When the
ignition switch is turned on, the SKIM interrogates the ignition key. If the ignition key is ªValidº the
SKIM sends a CCD Bus message to the body controller indicating the presence of a valid ignition
key. The BCM then supplies the ECM with a valid immobilizer signal allowing the engine to
continue to operate.
3.2.6 SKIS Operation
When ignition power is supplied to the SKIM, the SKIM performs an internal self-test. After the
self-test is completed, the SKIM energizes the antenna (this activates the transponder chip) and
sends a challenge to the transponder chip. The transponder chip responds to the challenge by
generating an encrypted response message using the following:
Secret Key þ This is an electronically stored value (identification number) that is unique to each
SKIS. The secret key is stored in the SKIM, BCM and all ignition key transponders.
Challenge þ This is a random number that is generated by the SKIM at each ignition key cycle.
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TEST DTCCHECKING FOR DIAGNOSTIC TROUBLE CODES
DRBIIITDIAGNOSTIC TROUBLE CODE (DTC) DISPLAYEDDIAGNOSTIC
TESTSCAN
TOOL
Engine Speed Sensor Over Speed Recognition TC-36 P0725
Engine Speed Sensor Static Plausibility TC-38 P0725
Fan Control Open Circuit Fan #1TC-39 P1690
Fan Control Open Circuit Fan #2TC-40 P1690
Fan Control Short Circuit Fan #1TC-41 P1690
Fan Control Short Circuit Fan #2TC-42 P1690
Fuel Quantity Actuator Neg. Gov. Deviation Cold TC-43 P1220
Fuel Quantity Actuator Neg. Gov. Deviation Warm TC-44 P1220
Fuel Quantity Actuator Pos. Gov. Deviation Cold TC-45 P1220
Fuel Quantity Actuator Pos. Gov. Deviation Warm TC-46 P1220
Fuel Temperature Sensor SRC High Exceeded TC-47 P0180
Fuel Temperature Sensor SRC Low Exceeded TC-48 P0180
Glow Relay #1 Controller Open Circuit TC-51 P1635
Glow Relay #2 Controller Open Circuit TC-52 P1635
Glow Relay #1 Controller Short Circuit TC-53 P1635
Glow Relay #2 Controller Short Circuit TC-54 P1635
Inductive Aux. Speed Sensor Dynamic Plausibility TC-56 P1725
Inductive Aux. Speed Sensor Overspeed Recognition TC-57 P1725
Inductive Aux. Speed Sensor Plausibility TC-58 P1725
Inductive Aux. Speed Sensor Static Plausibility TC-59 P1725
Intake Air Temperature Sensor Signal High Exceeded TC-62 P0110
Intake Air Temperature Sensor Signal Low Exceeded TC-63 P0110
Microcontroller Gate-array Monitoring** P1615
Microcontroller Gate-array Watchdog** P1615
Microcontroller Prepare Fuel Quantity Stop ** P1615
Microcontroller Recovery Has Occurred ** P1615
Microcontroller Redundant Overrun Monitoring ** P1615
Needle Movement Sensor High Exceeded TC-72 P1201
Needle Movement Sensor Low Exceeded TC-73 P1201
Redundant Emer. Stop Plausibility in After-run TC-74 P1660
Redundant Emer. Stop Powerstate Defective TC-75 P1660
Regulator Lower Regulator Limit** P1610
Regulator Upper Regulator Limit** P1610
Smart Start Relay Short CircuitTC-76 P1675
Solenoid Valve Controller Open Circuit TC-79 P1630
Solenoid Valve Controller Short Circuit TC-80 P1630
Temperature of Engine Coolant SRC High Exceeded TC-81 P0115
Temperature of Engine Coolant SRC Low Exceeded TC-82 P0115
Terminal #15 Plausibility After Start-up TC-84 P1605
Timing Governing Negative Governor Deviation TC-85 P1230
Timing Governing Positive Governor Deviation TC-86 P1230
UþREF (2.5V)** P1620
Vehicle Speed Sensor Pec Frequency Too High TC-91 P0500
Vehicle Speed Sensor Signal High Exceeded TC-91 P0500
Vehicle Speed Sensor PlausibilityTC-91 P0500
Immobilizer Signal LostTC-94 P1685
Invalid SKIM MessageTC-94 P1685
** These trouble codes indicate an internal ECM fault. Using the DRB, clear ECM trouble code(s).
Perform several engine run cycles turning the ignition off for at least 10 seconds between cycles.
Using the DRB, read ECM trouble codes. If the code is present, replace the Engine Control Module.
NOTE: If trouble code TERMINAL 15 PLAUSIBILITY AFTER START-UP is present with other trouble
codes, perform TC-84 diagnosis first.
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TEST TC-3AREPAIRING - A/C SYSTEM PRESSURE SIGNAL HIGH EXCEEDED
Perform TEST DTC Before Proceeding
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TURN A/C ON.
START TEST WITH THE DRB, READ IS THE A/C OUTPUT YES CONTINUE TEST
TC-3A. THE A/C OUTPUT VOLTAGE ABOVE TC-3A ON THE
VOLTAGE. 4.8 VOLTS? NEXT PAGE.
NO
USE THE SCHEMATIC AS REPAIR THE HARNESS
A GUIDE AND WIGGLE MONITOR THE DRB WAS THERE ANY A/C YES OR CONNECTOR THAT
A/C PRESSURE SENSOR DISPLAY. OUTPUT VOLTAGE CAUSED THE VOLTAGE
CONNECTOR & HARNESS. CHANGE? CHANGE.*
FIG.1
NO
AT THIS TIME, THE USING THE
CONDITION REQUIRED SCHEMATIC AS A WERE ANY PROBLEMS YES REPAIR AS
TO SET THE CODE IS GUIDE, INSPECT THE FOUND? NECESSARY.*
NOT PRESENT. WIRING AND
FIG.2 CONNECTORS.
NO
REFER TO GENERAL
INFORMATION 3.3.2
FOR ADDITIONAL TEST COMPLETE.*
INFORMATION ON
INTERMITTENT CODES.
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TEST TC-3ACONTINUED - REPAIRING - A/C SYSTEM PRESSURE SIGNAL HIGH EXCEEDED
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-3A
CONTINUED FROM DISCONNECT THE A/C
THE PREVIOUS PRESSURE SENSOR
PAGE.
KEY ON. USING A THE A/C PRESSURE REPAIR A/C
VOLTMETER MEASURE SENSOR SIGNAL IS THE VOLTAGE YES PRESSURE SENSOR
THE VOLTAGE CIRCUIT AND GROUND. ABOVE 5.0 VOLTS? SIGNAL SHORTED TO
BETWEEN... VOLTAGE.*
FIG.1
NO
KEY OFF. WITH AN OHMMETER, REPAIR THE SHORT
DISCONNECT THE ECM MEASURE BETWEEN A/C IS THE RESISTANCE YES BETWEEN THE A/C
HARNESS SENSOR SIGNAL CKT BELOW 5.0 OHMS? PRESSURE SENSOR
CONNECTORS.** AND 5-VOLT REF CKT. SIGNAL CKT AND THE
FIG.1 5-VOLT SUPPLY CKT.*
NO
RECONNECT THE ECM
HARNESS TURN IGNITION ON.
CONNECTORS.
CONNECT A JUMPER
WIRE BETWEEN THE A/C WITH THE DRB, READ IS THE VOLTAGE YES REPLACE THE A/C
PRESSURE SENSOR THE A/C OUTPUT BELOW 1.0 VOLT? PRESSURE SENSOR.*
SIGNAL AND SENSOR VOLTAGE.
GROUND CKTS. FIG.1
NO
MOVE THE JUMPER
WIRE FROM A/C READ THE A/C IS THE VOLTAGE YES REPAIR THE OPEN
PRESSURE SENSOR OUTPUT VOLTAGE. BELOW 1.0 VOLT? SENSOR GROUND
GROUND TO ENGINE CIRCUIT.*
GROUND.
NO
REPLACE THE ENGINE
CONTROL MODULE.* TURN IGNITION OFF.
HARNESS
CONNECTOR.**
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TEST TC-4AREPAIRING - A/C SYSTEM PRESSURE SIGNAL LOW EXCEEDED
Perform TEST DTC Before Proceeding
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TURN A/C ON.
START TEST WITH THE DRB, READ IS THE A/C OUTPUT YES CONTINUE TEST
TC-4A. THE A/C OUTPUT VOLTAGE BELOW 0.2 TC-4A ON THE
VOLTAGE. VOLT? NEXT PAGE.
NO
USE THE SCHEMATIC AS REPAIR THE HARNESS
A GUIDE AND WIGGLE MONITOR THE DRB WAS THERE ANY A/C YES OR CONNECTOR THAT
A/C PRESSURE SENSOR DISPLAY. OUTPUT VOLTAGE CAUSED THE VOLTAGE
CONNECTOR & HARNESS. CHANGE? CHANGE.*
FIG.1
NO
AT THIS TIME, THE USING THE
CONDITION REQUIRED SCHEMATIC AS A WERE ANY PROBLEMS YES REPAIR AS
TO SET THE CODE IS GUIDE, INSPECT THE FOUND? NECESSARY.*
NOT PRESENT. WIRING AND
FIG.2 CONNECTORS.
NO
REFER TO GENERAL
INFORMATION 3.3.2
FOR ADDITIONAL TEST COMPLETE.*
INFORMATION ON
INTERMITTENT CODES.
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TEST TC-4ACONTINUED - REPAIRING - A/C SYSTEM PRESSURE SIGNAL LOW EXCEEDED
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-4A DISCONNECT THE A/C
CONTINUED FROM PRESSURE SENSOR
THE PREVIOUS HARNESS
PAGE. CONNECTOR.**
USING A VOLTMETER, REPAIR THE 5-VOLT
MEASURE THE 5-VOLT IS THE VOLTAGE NO SUPPLY CIRCUIT FOR
SUPPLY CIRCUIT. ABOVE 4.9 VOLTS? AN OPEN OR SHORT
TO GROUND.*
FIG.1
YES
JUMPER THE A/C
PRESSURE SENSOR USING THE DRB, IS THE A/C OUTPUT YES REPLACE THE A/C
SIGNAL CKT.TO THE READ THE A/C VOLTAGE ABOVE PRESSURE SENSOR.*
5-VOLT REFERENCE OUTPUT VOLTAGE. 4.5 VOLTS?
CKT. FIG.1
NO
TURN IGNITION OFF. USING AN OHMMETER, REPAIR THE SENSOR
DISCONNECT THE ECM MEASURE THE A/C IS THE RESISTANCE YES SIGNAL CIRCUIT FOR
HARNESS PRESSURE SENSOR BELOW 5.0 OHMS? A SHORT TO
CONNECTORS.** SIGNAL CKT TO GND. GROUND.*
FIG.1
NO
USE AN OHMMETER IN SENSOR SIGNAL REPAIR THE SENSOR
THE FOLLOWING STEPS. CIRCUIT AND THE IS THE RESISTANCE YES SIGNAL CIRCUIT
MEASURE RESISTANCE SENSOR GROUND BELOW 5.0 OHMS? SHORTED TO THE
BETWEEN THE A/C CIRCUIT. SENSOR GROUND
PRESSURE... FIG.1 CIRCUIT.*
NO
MEASURE RESISTANCE
OF THE A/C IS THE RESISTANCE YES REPLACE THE ENGINE
PRESSURE SENSOR BELOW 5.0 OHMS? CONTROL MODULE.*
SIGNAL CIRCUIT.
FIG.2
NO
REPAIR THE OPEN
A/C PRESSURE
SENSOR SIGNAL
CIRCUIT.*
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TEST TC-15AREPAIRING - TURBOCHARGER BOOST SENSOR SIGNAL HIGH EXCEEDED
Perform TEST DTC Before Proceeding
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TURN IGNITION ON.
START TEST WITH THE DRB, READ IS THE VOLTAGE YES CONTINUE TEST
TC-15A. THE BOOST PRESSURE ABOVE 4.5 VOLTS? TC-15A ON THE
SENSOR VOLTAGE. NEXT PAGE.
NO
USE THE SCHEMATIC AS REPAIR THE HARNESS
A GUIDE AND WIGGLE MONITOR THE DRB WAS THERE ANY YES OR CONNECTOR THAT
BOOST PRESSURE DISPLAY. BOOST PRESSURE CAUSED THE VOLTAGE
SENSOR CONNECTOR AND VOLTAGE CHANGE? CHANGE.*
HARNESS. FIG.1
NO
AT THIS TIME, THE USING THE
CONDITION TO SET SCHEMATIC AS A WERE ANY PROBLEMS YES REPAIR AS
THE CODE IS NOT GUIDE, INSPECT THE FOUND? NECESSARY.*
PRESENT. WIRING AND
FIG.2 CONNECTORS.
NO
REFER TO GENERAL
INFORMATION 3.3.2
FOR ADDITIONAL TEST COMPLETE.
INFORMATION ON
INTERMITTENT CODES.
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TEST TC-15ACONTINUED - REPAIRING - TURBOCHARGER BOOST SENSOR SIGNAL HIGH
EXCEEDED
*Perform Verification TEST VER-2A. **Check connectors - Clean / repair as necessary.
TEST TC-15A
CONTINUED FROM DISCONNECT THE
THE PREVIOUS PRESSURE
PAGE. SENSOR
KEY ON. USING A THE BOOST PRESSURE
VOLTMETER, MEASURE SENSOR 5-VOLT IS THE VOLTAGE NO CONTINUE TEST
THE VOLTAGE SUPPLY CIRCUIT AND ABOVE 5.2 VOLTS? TC-15A ON THE
BETWEEN... GROUND. NEXT PAGE.
FIG.1
YES
KEY OFF.
DISCONNECT THE ECM REMOVE THE DIESEL
HARNESS POWER RELAY.**
CONNECTORS.**
WITH A JUMPER WIRE, TURN IGNITION ON.
CONNECT DIESEL POWER
RELAY CONN. CAVITIES USE A VOLTMETER IN
30 AND 87 (IN PDC). THE FOLLOWING
FIG.1 STEP.
MEASURE THE 5-VOLT
SUPPLY CKT AT THE IS THE VOLTAGE YES REPAIR THE 5-VOLT
BOOST PRESSURE ABOVE 1.0 VOLT? SUPPLY CKT FOR A
SENSOR HARNESS SHORT TO VOLTAGE.*
CONNECTOR. FIG.2
NO
REPLACE THE ENGINE
CONTROL MODULE.* TURN IGNITION OFF.
BOOST
HARNESS
CONNECTOR.**
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