2001 CHRYSLER VOYAGER oil

TABLE OF CONTENTS - Continued
P0235-BOOST PRESSURE SENSOR SIGNAL VOLTAGE TOO LOW.............67
P0235-BOOST PRESSURE SENSOR SUPPLY VOLTAGE TOO HIGH OR LOW....70
P0335-CKP POSITION SENSOR CIRCUIT OVERSPEED RECOGNITION.........73
P0340-CKP POSITION SENSOR CIRCUIT DYNAMIC PLAUSIBILITY.............75
P0340-CMP POSITION SENSOR CIRCUIT CMP/CKP SYNC FAILURE...........77
P0340-CMP POSITION SENSOR CIRCUIT SIGNAL FREQUENCY TOO HIGH.....80
P0340-CMP POSITION SENSOR CIRCUIT STATIC PLAUSIBILITY...............80
P0380-GLOW PLUG CIRCUIT A OPEN CIRCUIT.............................84
P0380-GLOW PLUG CIRCUIT A SHORT CIRCUIT............................84
P0403-EGR SOLENOID CIRCUIT OPEN CIRCUIT............................87
P0403-EGR SOLENOID CIRCUIT SHORT CIRCUIT...........................90
P0480-FAN 1 CONTROL CIRCUIT OPEN CIRCUIT...........................92
P0480-FAN 1 CONTROL CIRCUIT SHORT CIRCUIT..........................94
P0481-FAN 2 CONTROL CIRCUIT OPEN CIRCUIT...........................96
P0481-FAN 2 CONTROL CIRCUIT SHORT CIRCUIT..........................98
P0500-VEHICLE SPEED SENSOR FREQUENCY TOO HIGH..................100
P0500-VEHICLE SPEED SENSOR HIGH LEVEL DURATION...................100
P0500-VEHICLE SPEED SENSOR PLAUSIBILITY...........................100
P0500-VEHICLE SPEED SENSOR SIGNAL VOLTAGE TOO HIGH..............100
P0514-BATTERY TEMP SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH.......104
P0520- OIL PRESS SENSOR CIRCUIT MALF PLAUSIBILITY..................107
P0520-OIL PRESS SENSOR CKT MALF SUPPLY VOLTAGE TOO HIGH OR LOW .110
P0530-A/C PRESSURE SENSOR CIRCUIT PLAUSIBILITY....................112
P0530-A/C PRESSURE SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH.......112
P0530-A/C PRESSURE SENSOR CIRCUIT SIGNAL VOLTAGE TOO LOW.......112
P0530-A/C PRESSURE SENSOR CIRCUIT SUPPLY VOLTAGE TOO HIGH OR
LOW.................................................................112
P0560-SYSTEM VOLTAGE TOO HIGH.....................................117
P0560-SYSTEM VOLTAGE TOO LOW.....................................120
*CHECKING THE CHARGING SYSTEM OPERATION - DIESEL................120
P0615-STARTER RELAY CIRCUIT SHORT CIRCUIT.........................124
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE
DEVIATION TOO HIGH.................................................126
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE
DEVIATION TOO LOW..................................................126
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE TOO HIGH . . .126
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE TOO LOW. . . .126
P0620-GENERATOR FIELD CONTROL MALF CHARGING VOLTS TOO LOW. . . .126
P0620-GENERATOR FIELD CONTROL MALF OPEN CIRCUIT.................126
P0620-GENERATOR FIELD CONTROL MALF SHORT CIRCUIT................126
P0620-GENERATOR FIELD CONTROL MALF UNSTABLE CURRENT...........126
P0627-FUEL LIFT PUMP RELAY CONTROL CIRCUIT OPEN CIRCUIT..........129
P0627-FUEL LIFT PUMP RELAY CONTROL CIRCUIT SHORT CIRCUIT.........131
P0641-SENSOR REFERENCE VOLTAGE A CKT VOLTAGE TOO HIGH..........133
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO HIGH..........133
P0641-SENSOR REFERENCE VOLTAGE A CKT VOLTAGE TOO LOW..........136
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO LOW..........136
P0645-A/C CLUTCH RELAY CIRCUIT OPEN CIRCUIT........................139
P0645-A/C CLUTCH RELAY CIRCUIT SHORT CIRCUIT......................142
P0685-ECM/PCM RELAY CONTROL CIRCUIT SHUTS OFF TOO EARLY........145
P0685-ECM/PCM RELAY CONTROL CIRCUIT SHUTS OFF TOO LATE..........147
P0703-BRAKE SWITCH SIGNAL CIRCUITS PLAUSIBILITY WITH
REDUNDANT CONTACT................................................149
iii

TABLE OF CONTENTS - Continued
SERIAL LINK EXTERNAL FAULT.........................................216
ROLLING CODE FAILURE...............................................218
VIN MISMATCH........................................................218
TRANSPONDER COMMUNICATION FAILURE..............................220
TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE.............220
TRANSPONDER ID MISMATCH..........................................220
TRANSPONDER RESPONSE MISMATCH..................................220
VERIFICATION TESTS
VERIFICATION TESTS..................................................223
8.0 COMPONENT LOCATIONS..............................................227
8.1CONTROL MODULES.............................................227
8.2CONTROLS AND SOLENOIDS......................................227
8.3DATA LINK CONNECTOR..........................................227
8.4FUEL SYSTEM...................................................228
8.5RELAYS.........................................................228
8.6SENSORS.......................................................229
8.7SWITCHES......................................................230
9.0 CONNECTOR PINOUTS................................................231
A/C COMPRESSOR CLUTCH - LT. GRAY 2 WAY............................231
A/C PRESSURE SENSOR - GRAY 4 WAY..................................231
ACCELERATOR PEDAL POSITION SENSOR (DIESEL) - BLACK 10 WAY........231
BATTERY TEMPERATURE SENSOR (DIESEL) - BLACK 2 WAY................231
BOOST PRESSURE SENSOR (DIESEL) - BLACK 4 WAY.....................232
BRAKE LAMP SWITCH - BLACK 6 WAY...................................232
CAMSHAFT POSITION SENSOR (DIESEL) - BLACK 3 WAY...................232
CLUTCH PEDAL UPSTOP SWITCH (DIESEL) - RED 2 WAY...................232
CRANKSHAFT POSITION SENSOR (DIESEL) - BLACK 3 WAY................232
DATA LINK CONNECTOR - BLACK 16 WAY................................233
EGR SOLENOID (DIESEL) - LT. GRAY 2 WAY...............................233
ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAY..................234
ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAY..................235
ENGINE CONTROL MODULE C2 (DIESEL) - BLACK 40 WAY..................236
ENGINE COOLANT TEMP SENSOR (DIESEL) - BLUE 2 WAY.................236
ENGINE OIL PRESSURE SENSOR (DIESEL) - BLACK 3 WAY.................237
ENGINE OIL TEMPERATURE SENSOR (DIESEL) - BLACK 2 WAY.............237
FUEL HEATER (DIESEL) - BLACK 2 WAY..................................237
FUEL INJECTOR NO. 1 (DIESEL) - BLACK 2 WAY...........................237
FUEL INJECTOR NO. 2 (DIESEL) - BLACK 2 WAY...........................237
FUEL INJECTOR NO. 3 (DIESEL) - BLACK 2 WAY...........................238
FUEL INJECTOR NO. 4 (DIESEL) - BLACK 2 WAY...........................238
FUEL PRESSURE SENSOR (DIESEL) - BLACK 3 WAY.......................238
FUEL PRESSURE SOLENOID (DIESEL) - BLACK 2 WAY.....................238
GENERATOR - BLACK 2 WAY...........................................238
GLOW PLUG RELAY (DIESEL) - BLACK 4 WAY.............................239
INTELLIGENT POWER MODULE C3 (DIESEL) - YELLOW/RED 20 WAY.........239
LEFT SPEED CONTROL SWITCH - WHITE 2 WAY..........................239
LIFT PUMP MOTOR (DIESEL) - BLACK 2 WAY..............................239
MASS AIR FLOW SENSOR (DIESEL) - ORANGE 5 WAY......................240
v

sponder ID message to the SKIM. The SKIM com-
pares the transponder ID message to the available
valid key codes in SKIM memory (8 key maximum
at any one time). After validating the ignition key,
the SKIM sends a PCI Bus message called a seed
request to the ECM, then waits for the ECM re-
sponse. If the ECM does not respond, the SKIM will
send the seed request again. After three failed
attempts, the SKIM will stop sending the seed
request and store a trouble code in memory. If the
ECM sends a seed response, the SKIM sends a
valid/invalid key message to the ECM. This is an
encrypted message that is generated using the
following:
VIN - Vehicle Identification Number.
Seed - This is a random number that is generated
by the ECM at each ignition key cycle.
The VIN and seed are two variables used in the
rolling code algorithm that encrypts the valid/
invalid key message. The ECM uses the rolling code
algorithm to receive, decode and respond to the
valid/invalid key message sent by the SKIM. After
sending the valid/invalid key message, the SKIM
waits 3.5 seconds for an ECM status message from
the ECM. If the ECM does not respond with a valid
key message to the SKIM, a fault is detected and a
code is stored.
The SKIS incorporates a warning lamp located in
the information center. The lamp receives switched
ignition voltage and is hardwired to the body con-
trol module. The lamp is actuated when the SKIM
sends a PCI Bus message to the body control
module requesting the lamp on. The body control
module then provides the ground for the lamp.
The SKIM will request lamp operation for the
following:
± bulb check at ignition on
± to alert the vehicle operator to a SKIS malfunc-
tion
± when the SKIM is in customer key programming
mode
For all faults except transponder faults the lamp
remains on steady. In the event of a transponder
fault the lamp will flash at a rate of 1Hz (once per
second). If a fault is present, the lamp will remain
on or flashing for the complete ignition cycle. If a
fault is stored in SKIM memory which prevents the
system from operating properly, the ECM will allow
the engine to start and idle for 2 seconds then stall.
This may occur up to six times. After the sixth
attempt, the ECM disables the starter relay until
the fault is corrected.
3.3 DIAGNOSTIC TROUBLE CODES
Each diagnostic trouble code (DTC) is diagnosed
by following a specific procedure. The diagnostic
test procedure contains step-by-step instruction fordetermining the cause of the DTC as well as no
trouble code problems. It is not necessary to per-
form all of the tests in this book to diagnose an
individual code.
Always begin diagnosis by reading the DTC's
using the DRBIIIt.
3.3.1 HARD CODE
A DTC that comes back within one cycle of the
ignition key is a hard code. This means that the
problem is current every time the ECM/SKIM
checks that circuit or function. Procedures in this
manual verify if the DTC is a hard code at the
beginning of each test. When the fault is not a hard
code, an intermittent test must be performed.
NOTE: If the DRBIIItdisplays faults for multiple
components (i.e. ECT, VSS, Oil Temp sensors) iden-
tify and check the shared circuits for possible prob-
lems before continuing (i.e. sensor grounds or 5-volt
supply circuits). Refer to the appropriate schematic
to identify shared circuits.
3.3.2 INTERMITTENT CODE
A DTC that is not current every time the ECM/
SKIM checks the circuit or function is an intermit-
tent code. Most intermittent DTCs are caused by
wiring or connector problems. Problems that come
and go like this are the most difficult to diagnose;
they must be looked for under specific conditions
that cause them. The following checks may assist
you in identifying a possible intermittent problem.
²Visually inspect the related wire harness connec-
tors. Look for broken, bent, pushed out, or cor-
roded terminals.
²Visually inspect the related wire harness. Look
for chafed, pierced, or partially broken wire.
²Refer to hotlines or technical service bulletins
that may apply.
NOTE: Electromagnetic (radio) interference can
cause an intermittent system malfunction. This
interference can interrupt communication between
the ignition key transponder and the SKIM.
3.3.3 ECM DIAGNOSTIC TROUBLE CODES
IMPORTANT NOTE:Before replacing the ECM
for a failed driver, control circuit or ground circuit,
be sure to check the related component/circuit in-
tegrity for failures not detected due to a double fault
in the circuit. Most ECM driver/control circuit fail-
ures are caused by internal failures to components
(i.e. relays and solenoids) and shorted circuits (i.e.
sensor pull-ups, drivers and ground circuits). These
faults are difficult to detect when a double fault has
occurred and only one DTC has set.
If the DRB displays faults for multiple compo-
nents (i.e. VSS, ECT, Batt Temp, etc.), identify and
3
GENERAL INFORMATION

check the shared circuits for possible problems
before continuing (i.e. Sensor Grounds or 5-Volt
Supply circuits). Refer to the appropriate wiring
diagrams to identify shared circuits.
MASS AIR FLOW SENSOR SIGNAL VOLTAGE
TOO HIGH
MASS AIR FLOW SENSOR SIGNAL VOLTAGE
TOO LOW
MASS AIR FLOW SENSOR SUPPLY VOLTAGE
TOO HIGH OR LOW
MASS AIR FLOW SENSOR PLAUSIBILITY
MASS AIR FLOW SENSOR SIGNAL PLAUSI-
BILITY POSITIVE AREA
BAROMETRIC PRESSURE CIRCUIT SIGNAL
VOLTAGE TOO HIGH
BAROMETRIC PRESSURE CIRCUIT SIGNAL
VOLTAGE TOO LOW
INTAKE AIR TEMP SENSOR SIGNAL VOLT-
AGE TOO HIGH
INTAKE AIR TEMP SENSOR SIGNAL VOLT-
AGE TOO LOW
ENGINE COOLANT TEMP SENSOR SIGNAL
VOLTAGE TOO HIGH
ENGINE COOLANT TEMP SENSOR SIGNAL
VOLTAGE TOO LOW
FUEL PRESS SENSOR CIRCUIT MALF SIG-
NAL VOLTAGE TOO HIGH
FUEL PRESS SENSOR CIRCUIT MALF SIG-
NAL VOLTAGE TOO LOW
FUEL PRESS SENSOR CIRCUIT MALF SUP-
PLY VOLTAGE TOO HIGH OR LOW
OIL TEMP SENSOR CIRCUIT MALF SIGNAL
VOLTAGE TOO HIGH
OIL TEMP SENSOR CIRCUIT MALF SIGNAL
VOLTAGE TOO LOW
CYLINDER 1-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 1-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 1-INJECTOR CIRCUIT LOAD
DROP
CYLINDER 1-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 2-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 2-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 2-INJECTOR CIRCUIT LOAD
DROP
CYLINDER 2-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 3-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 3-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 3-INJECTOR CIRCUIT LOAD
DROPCYLINDER 3-INJECTOR CIRCUIT CURRENT
DECREASE
CYLINDER 4-INJECTOR CIRCUIT OVERCUR-
RENT HIGH SIDE
CYLINDER 4-INJECTOR CIRCUIT OVERCUR-
RENT LOW SIDE
CYLINDER 4-INJECTOR CIRCUIT LOAD
DROP
CYLINDER 4-INJECTOR CIRCUIT CURRENT
DECREASE
BOOST PRESSURE SENSOR SIGNAL VOLT-
AGE TOO HIGH
BOOST PRESSURE SENSOR SIGNAL VOLT-
AGE TOO LOW
BOOST PRESSURE SENSOR SUPPLY VOLT-
AGE TOO HIGH OR LOW
BOOST PRESSURE SENSOR PLAUSIBILITY
CKP POSITION SENSOR CIRCUIT OVER-
SPEED RECOGNITION
CKP POSITION SENSOR CIRCUIT DYNAMIC
PLAUSIBILITY
CKP POSITION SENSOR CIRCUIT STATIC
PLAUSIBILITY
CMP POSITION SENSOR CIRCUIT CMP/CKP
SYNC FAILURE
CMP POSITION SENSOR CIRCUIT DYNAMIC
PLAUSIBILITY
CMP POSITION SENSOR CIRCUIT STATIC
PLAUSIBILITY
CMP POSITION SENSOR CIRCUIT SIGNAL
FREQUENCY TOO HIGH
CMP POSITION SENSOR CIRCUIT FUEL
SHUT-OFF ACTIVATED
GLOW PLUG CIRCUIT A SHORT CIRCUIT
GLOW PLUG CIRCUIT A OPEN CIRCUIT
EGR SOLENOID CIRCUIT OPEN CIRCUIT
EGR SOLENOID CIRCUIT SHORT CIRCUIT
EGR SOLENOID CIRCUIT IMPROPER FLOW
FAN 1 CONTROL CIRCUIT OPEN CIRCUIT
FAN 1 CONTROL CIRCUIT SHORT CIRCUIT
FAN 2 CONTROL CIRCUIT OPEN CIRCUIT
FAN 2 CONTROL CIRCUIT SHORT CIRCUIT
VEHICLE SPEED SENSOR SIGNAL VOLTAGE
TOO HIGH
VEHICLE SPEED SENSOR FREQUENCY TOO
HIGH
VEHICLE SPEED SENSOR HIGH LEVEL DU-
RATION
VEHICLE SPEED SENSOR PLAUSIBILITY
BATTERY TEMP SENSOR SIGNAL VOLTAGE
TOO HIGH
BATTERY TEMP SENSOR SIGNAL VOLTAGE
TOO LOW
OIL PRESS SENSOR CKT MALF PLAUSIBIL-
ITY
4
GENERAL INFORMATION

Symptom:
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO
HIGH
When Monitored and Set Condition:
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO HIGH
When Monitored: With the ignition on.
Set Condition: The Oil Temperature Sensor Signal voltage is above 4.95 volts for at least
2 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
ENGINE OIL TEMPERATURE SENSOR GROUND CIRCUIT OPEN
ENGINE OIL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
ENGINE OIL TEMPERATURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE
ENGINE OIL TEMPERATURE SENSOR
ENGINE OIL TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, monitor the Engine Oil Temperature Sensor voltage.
Is the Engine Oil Temperature Sensor voltage above 4.5 volts?All
Ye s®Go To 2
No®Go To 8
2 Turn the ignition off.
Disconnect the Engine Oil Temperature Sensor harness connector.
Turn the ignition on.
Measure the voltage on the Engine Oil Temperature Sensor Signal circuit.
Is the voltage above 5.5 volts?All
Ye s®Repair the Engine Oil Temperature Sensor Signal circuit for a
short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 3
41
DRIVEABILITY - DIESEL

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Engine Oil Temperature Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Sensor Ground circuit at the Engine Oil Temperature
Sensor and ECM harness connectors.
Is the voltage above 1.0 volt at either connector?All
Ye s®Repair the Engine Oil Temperature Sensor Ground circuit for a
short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 4
NOTE: If the Sensor Ground circuit had a short to voltage on it, the ECM
may have been damaged. Retest the Engine Oil Temperature Sensor circuit.
4 Turn the ignition off.
Disconnect the Engine Oil Temperature Sensor harness connector.
Connect a jumper wire between the Engine Oil Temperature Sensor harness
connector cavities.
Turn the ignition on.
With the DRB, read the Oil Temp Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Replace the Engine Oil Temperature Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 5
5 Turn the ignition off.
Disconnect the Engine Oil Temperature Sensor harness connector.
Connect a jumper wire between ground and the Engine Oil Temperature Sensor
Signal circuit.
Turn the ignition on.
With the DRB, read the Oil Temp Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Repair the Engine Oil Temperature Sensor Ground circuit for an
open.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 6
6 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Engine Oil Temperature Sensor harness connector.
Measure the resistance of the Engine Oil Temperature Sensor Signal circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the Engine Oil Temperature Sensor Signal circuit for an
open.
Perform ROAD TEST VERIFICATION - VER-2.
42
DRIVEABILITY - DIESEL
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO HIGH
Ð
Continued

TEST ACTION APPLICABILITY
7 If there are no possible causes remaining, view repair. All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
8WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?All
Ye s®Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No®Test Complete.
43
DRIVEABILITY - DIESEL
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO HIGH
Ð
Continued

Symptom:
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO
LOW
When Monitored and Set Condition:
P0195-OIL TEMP SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO LOW
When Monitored: With the ignition on.
Set Condition: The Oil Temperature Sensor Signal voltage is below 0.2 volt for at least 2
seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
OIL TEMPERATURE SENSOR
OIL TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
OIL TEMPERATURE SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, monitor the Oil Temperature (OT) Sensor voltage.
Is the OT Sensor voltage below 0.3 volt?All
Ye s®Go To 2
No®Go To 6
2 Turn the ignition off.
Disconnect the OT Sensor harness connector.
Turn the ignition on.
With the DRB, read the OT Sensor voltage.
Is the voltage above 4.0 volts?All
Ye s®Replace the Oil Temperature Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 3
3 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the OT Sensor harness connector.
Measure the resistance between ground and the OT Sensor Signal circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 4
No®Repair the OT Sensor Signal circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
44
DRIVEABILITY - DIESEL