
Symptom:
*ENGINE CRANKS BUT WILL NOT START
POSSIBLE CAUSES
CHECKING FOR ECM CODES
CHECKING FOR SKIM CODES
CHECKING THE ECT SENSOR
CHECKING THE GLOW PLUG OPERATION
ENGINE DRIVE BELT
FUEL INJECTOR DRIVER CIRCUIT(S) SHORTED TO GROUND
FUEL PRESSURE SENSOR
FUEL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT OPEN
FUEL PRESSURE SENSOR SIGNAL CIRCUIT OPEN
FUEL SUPPLY CONTAMINATION
FUEL SYSTEM PRESSURE MECHANICAL
FUEL SYSTEM RESTRICTION
SENSOR GROUND OPEN
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read the ECM DTCs.
Does the DRBIIItdisplay any ECM DTCs?All
Ye s®Refer to symptom list for problems related to ECM DTC.
Perform NO START VERIFICATION - VER-1.
No®Go To 2
2 Turn the ignition on.
With the DRBIIIt, read the SKIM DTCs.
Does the DRBIIItdisplay any SKIM DTCs?All
Ye s®Refer to symptom list for problems related to SKIM DTC.
Perform NO START VERIFICATION - VER-1.
No®Go To 3
3 Using a temperature probe, check the vehicle temperature near the ECT Sensor.
Turn the ignition on.
With the DRBIIItin Sensors, read the ECT Sensor temperature.
Compare the temperature probe reading with the DRB reading.
Are the two readings within 10ÉC of each other?All
Ye s®Go To 4
No®Repair as necessary.
Perform NO START VERIFICATION - VER-1.
207
DRIVEABILITY - DIESEL

TEST ACTION APPLICABILITY
9 Refer to the Service Information and perform the fuel pressure test.
Is the fuel pressure within specification?All
Ye s®Go To 10
No®Repair as necessary.
Perform NO START VERIFICATION - VER-1.
10 Refer to the Service Information and perform the fuel pressure test. Note the test
results.
Using the DRB, read the Fuel Pressure PSI and compare the two readings.
Are the two readings within 500 psi of each other?All
Ye s®Go To 11
No®Go To 12
11 Refer to the Service Information to ensure the Engine Drive Belt is installed correctly
and the camshaft and crankshaft gears are timed correctly.
Were any problems found?All
Ye s®Repair as necessary.
Perform NO START VERIFICATION - VER-1.
No®Check the fuel supply for contamination.
Perform NO START VERIFICATION - VER-1.
12 Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Fuel Pressure Sensor Signal circuit.
Is the resistance below 10.0 ohms?All
Ye s®Go To 13
No®Repair the Fuel Pressure Sensor Signal circuit for an open.
Perform NO START VERIFICATION - VER-1.
13 Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Fuel Pressure Sensor 5-volt Supply circuit.
Is the resistance below 10.0 ohms?All
Ye s®Go To 14
No®Repair the Fuel Pressure Sensor 5-volt Supply circuit for an open.
Perform NO START VERIFICATION - VER-1.
14 Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Ground circuit.
Is the resistance below 10.0 ohms?All
Ye s®Replace the Fuel Pressure Sensor in accordance with the Service
Information.
Perform NO START VERIFICATION - VER-1.
No®Repair the Sensor Ground circuit for an open.
Perform NO START VERIFICATION - VER-1.
209
DRIVEABILITY - DIESEL
*ENGINE CRANKS BUT WILL NOT START ÐContinued

ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAYCAV CIRCUIT FUNCTION
1 Z130 14BK/BR GROUND
2 Z131 14BK/DG GROUND
3 K20 14BR/GY GENERATOR FIELD CONTROL
4 K342 14BR/WT ECM/PCM RELAY OUTPUT
5 K342 14BR/WT ECM/PCM RELAY OUTPUT
6- -
7 D25 20WT/VT PCI BUS
8 K944 20BK/GY CAMSHAFT POSITION SENSOR SHIELD GROUND
9 K44 20DB/GY CAMSHAFT POSITION SENSOR SIGNAL
10 - -
11 K37 20DB/YL BOOST PRESSURE SENSOR SIGNAL
12 K55 20DB/OR MASS AIR FLOW SENSOR SIGNAL
13 K78 20GY FUEL PRESSURE SENSOR SIGNAL
14 - -
15 K22 20OR/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
16 K80 20DB/TN FUEL PRESSURE SENSOR GROUND
17 - -
18 - -
19 N1 20DB/OR FUEL HEATER RELAY OUTPUT
20 Z138 20BK/OR GROUND
21 K900 20DB/DG SENSOR GROUND
22 F202 20PK/GY IGNITION SWITCH OUTPUT (RUN-START)
23 F851 20LB/PK SENSOR REFERENCE VOLTAGE B
24 K3 20BR/OR CRANKSHAFT POSITION SENSOR SIGNAL NO. 1
25 - -
26 - -
27 - -
28 - -
29 - -
30 G6 20VT/GY ENGINE OIL PRESSURE SENSOR SIGNAL
31 F853 20LG/PK WATER IN FUEL SENSOR SIGNAL
32 K25 20BR/TN BATTERY TEMPERATURE SENSOR SIGNAL
33 - -
34 K167 20BR/YL ACCELERATOR PEDAL POSITION SENSOR GROUND
35 K853 20DB/BR ACCELERATOR PEDAL POSITION SENSOR 5 VOLT SUPPLY
36 C18 20LB/BR A/C PRESSURE SENSOR SIGNAL
37 K89 20DB/WT ENGINE OIL TEMPERATURE SENSOR SIGNAL
38 V37 20VT/TN SPEED CONTROL SWITCH SIGNAL
39 - -
40 K2 20TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
41 K21 20DB/LG INTAKE AIR TEMPERATURE SENSOR SIGNAL
42 Z122 18WT GROUND (DRAIN)
43 K24 20BR/LB CRANKSHAFT POSITION SENSOR SIGNAL NO. 2
44 - -
45 - -
46 - -
47 L50 20WT/TN PRIMARY BRAKE SWITCH SIGNAL
48 B29 20DG/WT SECONDARY BRAKE SWITCH SIGNAL
49 T751 20YL IGNITION SWITCH OUTPUT (START)
50 F855 20PK/YL SENSOR REFERENCE VOLTAGE A
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CONNECTOR PINOUTS

ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAYCAV CIRCUIT FUNCTION
51 - -
52 K121 20DB BOOST PRESSURE SENSOR GROUND
53 - -
54 K957 20BK/OR MASS AIR FLOW SENSOR GROUND
55 N7 20DB/OR VEHICLE SPEED SENSOR SIGNAL
56 C918 20BK/LB A/C PRESSURE SENSOR GROUND
57 - -
58 K4 20BK/LB LOW IDLE POSITION SWITCH GROUND
59 - -
60 K9 20LB FUEL PRESSURE SENSOR 5 VOLT SUPPLY
61 K51 20BR/WT ECM/PCM RELAY CONTROL
62 - -
63 D21 20WT/BR SCI TRANSMIT
64 K151 20WT LOW IDLE POSITION SWITCH SENSE
65 - -
66 K936 20BR/YL ENGINE OIL PRESSURE SENSOR GROUND
67 - -
68 - -
69 C13 20LB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
70 N210 20DB/DG LOW SPEED RADIATOR FAN RELAY CONTROL
71 - -
72 N21 20DB/TN LIFT PUMP RELAY CONTROL
73 - -
74 T752 20DG/OR ENGINE STARTER MOTOR RELAY CONTROL
75 - -
76 - -
77 K152 20DB/WT GLOW PLUG RELAY CONTROL
78 N122 20DB/YL HIGH SPEED RADIATOR FAN DUAL RELAY CONTROL
79 - -
80 K87 20BR FUEL PRESSURE SOLENOID CONTROL
81 K87 20BR FUEL PRESSURE SOLENOID CONTROL
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CONNECTOR PINOUTS

ENGINE OIL PRESSURE SENSOR (DIESEL) - BLACK 3 WAYCAV CIRCUIT FUNCTION
1 F855 20PK/YL SENSOR REFERENCE VOLTAGE A
2 G6 20VT/GY ENGINE OIL PRESSURE SENSOR SIGNAL
3 K936 20BR/YL ENGINE OIL PRESSURE SENSOR GROUND
ENGINE OIL TEMPERATURE SENSOR (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K89 20DB/WT ENGINE OIL TEMPERATURE SENSOR SIGNAL
2 K900 20DB/OR SENSOR GROUND
FUEL HEATER (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 N1 16RD FUEL HEATER RELAY OUTPUT
2 Z201 18RD GROUND
FUEL INJECTOR NO. 1 (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K111 14DB/LB COMMON INJECTOR DRIVER
2 K11 14WT/DB FUEL INJECTOR NO. 1 CONTROL
FUEL INJECTOR NO. 2 (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K111 14DB/LB COMMON INJECTOR DRIVER
2 K12 14TN FUEL INJECTOR NO. 2 CONTROL
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CONNECTOR PINOUTS

FUEL INJECTOR NO. 3 (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K111 14DB/LB COMMON INJECTOR DRIVER
2 K13 14BR/LB FUEL INJECTOR NO. 3 CONTROL
FUEL INJECTOR NO. 4 (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K111 14DB/LB COMMON INJECTOR DRIVER
2 K14 14LB/BR FUEL INJECTOR NO. 4 CONTROL
FUEL PRESSURE SENSOR (DIESEL) - BLACK 3 WAYCAV CIRCUIT FUNCTION
1 K80 20DB/TN FUEL PRESSURE SENSOR GROUND
2 K78 20GY FUEL PRESSURE SENSOR SIGNAL
3 K9 20LB FUEL PRESSURE SENSOR 5 VOLT SUPPLY
FUEL PRESSURE SOLENOID (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K342 16BR/WT ECM/PCM RELAY OUTPUT
2 K87 16BR FUEL PRESSURE SOLENOID CONTROL
GENERATOR - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 K342 16BR/WT (DIESEL) ECM/PCM RELAY OUTPUT
1 K342 16BR/WT (GAS) AUTOMATIC SHUTDOWN RELAY OUTPUT
2 K20 18BR/GY (GAS) GENERATOR FIELD CONTROL
2 K20 14BR/GY (DIESEL) GENERATOR FIELD CONTROL
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CONNECTOR PINOUTS

LUBRICANTS AND GREASES
Lubricating grease is rated for quality and usage
by the NLGI. All approved products have the NLGI
symbol (Fig. 7) on the label. At the bottom NLGI
symbol is the usage and quality identification letters.
Wheel bearing lubricant is identified by the letter
ªGº. Chassis lubricant is identified by the latter ªLº.
The letter following the usage letter indicates the
quality of the lubricant. The following symbols indi-
cate the highest quality.
OPERATION
The cooling system is designed around the coolant.
The coolant must accept heat from engine metal, in
the cylinder head area near the exhaust valves and
engine block. Then coolant carries the heat to the
radiator where the tube/fin radiator can transfer the
heat to the air.
WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
BASE COOLANT AND IS HARMFUL IF SWAL-
LOWED OR INHALED. IF SWALLOWED, DRINK
TWO GLASSES OF WATER AND INDUCE VOMIT-
ING. IF INHALED, MOVE TO FRESH AIR AREA.
SEEK MEDICAL ATTENTION IMMEDIATELY. DO NOT
STORE IN OPEN OR UNMARKED CONTAINERS.
WASH SKIN AND CLOTHING THOROUGHLY AFTER
COMING IN CONTACT WITH ETHYLENE GLYCOL.
KEEP OUT OF REACH OF CHILDREN. DISPOSE OF
GLYCOL BASE COOLANT PROPERLY, CONTACT
YOUR DEALER OR GOVERNMENT AGENCY FOR
LOCATION OF COLLECTION CENTER IN YOUR
AREA. DO NOT OPEN A COOLING SYSTEM WHEN
THE ENGINE IS AT OPERATING TEMPERATURE OR
HOT UNDER PRESSURE, PERSONAL INJURY CAN
RESULT. AVOID RADIATOR COOLING FAN WHEN
ENGINE COMPARTMENT RELATED SERVICE IS
PERFORMED, PERSONAL INJURY CAN RESULT.
FLUID FILL/CHECK
LOCATIONS
DESCRIPTION
The fluid check/fill points and lubrication locations
are located in each applicable Sections.
MAINTENANCE SCHEDULES
DESCRIPTION
There are two maintenance schedules that show
proper service for your vehicle.
First is Schedule ±A. It lists all the scheduled
maintenance to be performed under ªnormalº operat-
ing conditions.
Second is Schedule ±B. It is a schedule for vehi-
cles that are operated under the following conditions:
²Frequent short trip driving less than 10 miles
(16.2 km)
²Frequent driving in dusty conditions
²Frequent off-road or desert operation
²Frequent trailer towing
²Day and night temperatures are below freezing
²Frequent long periods of engine idling
²Frequent stop and go driving
²More than 50% of your driving is at sustained
high speeds during hot weather, above 90ÉF (32ÉC)*
²Taxi, police or delivery service
²If equipped for and operation with E-85
(ethanol) fuel.
DESCRIPTION
At Each Stop For Fuel
²Check engine oil level and add as required.
²Check windshield washer solvent and add as
required.
Once A Month
²Check tire pressure and look for unusual wear
or damage.
²Check fluid levels of coolant reservoir, brake
master cylinder, power steering and transmission.
Add fluid as required.
²Check all lights and all other electrical items for
correct operation.
At Each Oil Change
²Change oil filter
²Inspect the exhaust system.
²Inspect brake hoses.
²Inspect the CV joints and front suspension com-
ponent boots and seals.
²Rotate the tires at each oil change interval
shown on Schedule ± A (7,500 miles - 12 000 km) or
Fig. 7 NLGI Symbol
1 - WHEEL BEARINGS
2 - CHASSIS LUBRICATION
3 - CHASSIS AND WHEEL BEARINGS
RSLUBRICATION & MAINTENANCE0-7
FLUID TYPES (Continued)

FLUID FILL/CHECK
LOCATIONS
DESCRIPTION
The fluid check/fill points and lubrication locations
are located in each applicable service manual section.
MAINTENANCE SCHEDULES
MAINTENANCE SCHEDULES - DIESEL ENGINE
There are two maintenance schedules that show
proper service for the vehicle.
First is ScheduleªAº. It lists all the scheduled
maintenance to be performed under ªnormalº operat-
ing conditions.
Second is ScheduleªBº. It is a schedule for vehi-
cles that are operated under the conditions listed at
the beginning of the schedule.
Use the schedule that best describes the driving
conditions.
Where time and mileage are listed, follow the
interval that occurs first.
At Each Stop for Fuel
²Check the engine oil level, add as required.
²Check the windshield washer solvent and add if
required.
Once a Month
²Check the tire pressure and look for unusual
wear or damage.
²Inspect the battery and clean and tighten termi-
nals as required.
²Check the fluid levels of coolant reservoir, brake
master cylinder, power steering and transaxle and
add as needed.
²Check all lights and all other electrical items for
correct operation.
²Check the rubber seals on each side of the radi-
ator for proper fit.
At Each Oil Change
²Replace the engine oil filter at each oil change.
²Inspect exhaust system.
²Inspect brake hoses
²Inspect the CV joints and front suspension com-
ponents
²Rotate the tires at each oil change interval
shown on schedule ªAº 20 000 km or every other
interval shown on schedule ªBº 20 000 km.
²Check the coolant level, hoses, and clamps.
²Inspect brake linings, hoses and calipers.
²Inspect engine accessory drive belts.
²Inspect for presence of water in fuel filter/water
separator, drain if necessary.
SCHEDULE ªAº
20 000 km (12 000 miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Inspect air filter element. Replace as necessary.
40 000 km (24 000 Miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Replace air filter element.
²Replace fuel filter/water separator element. (2)
²Check alignment.
60 000 km (37 000 Miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Inspect air filter element. Replace as necessary.
80 000 km (49 000 Miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Replace air filter element.
²Replace fuel filter/water separator element. (2)
²Check alignment.
100 000 km (62 000 Miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Inspect air filter element. Replace as necessary.
120 000 km (75 000 Miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Replace air filter element.
²Replace fuel filter/water separator element. (2)
²Check alignment.
140 000 km (86 000 miles)
²Change engine oil. (1)
²Replace engine oil filter.
²Inspect air filter element. Replace as necessary.
Fig. 6 Engine Oil Viscosity Recommendation ±
Diesel Engines
RGLUBRICATION & MAINTENANCE - RG - 2.5 L TURBO DIESEL0a-5
FLUID TYPES (Continued)