Jeep Grand Cherokee WK. Manual — part 852

P2096-DOWNSTREAM FUEL TRIM SYSTEM

1 LEAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 856

P2097-DOWNSTREAM FUEL TRIM SYSTEM

1 RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 863

P2098-DOWNSTREAM FUEL TRIM SYSTEM

2 LEAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 870

P2099-DOWNSTREAM FUEL TRIM SYSTEM

2 RICH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 877

P2100-ELECTRONIC THROTTLE CONTROL

MOTOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . 884

P2101-ELECTRONIC THROTTLE CONTROL

MOTOR PERFORMANCE . . . . . . . . . . . . . . . 890

P2106-ELECTRONIC THROTTLE CONTROL

SYSTEM - FORCED LIMITED POWER . . . . . 892

P2107-ELECTRONIC THROTTLE CONTROL

MODULE PROCESSOR . . . . . . . . . . . . . . . . 893

P2108-ELECTRONIC THROTTLE CONTROL

MODULE PERFORMANCE . . . . . . . . . . . . . . 894

P2110-ELECTRONIC THROTTLE CONTROL

- FORCED LIMITED RPM . . . . . . . . . . . . . . . 895

P2111-ELECTRONIC THROTTLE CONTROL

- UNABLE TO CLOSE . . . . . . . . . . . . . . . . . 900

P2112-ELECTRONIC THROTTLE CONTROL

- UNABLE TO OPEN . . . . . . . . . . . . . . . . . . 905

P2115-ACCELERATOR PEDAL POSITION

SENSOR 1 MINIMUM STOP
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 910

P2116-ACCELERATOR PEDAL POSITION

SENSOR 2 MINIMUM STOP
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 911

P2118-ELECTRONIC THROTTLE CONTROL

MOTOR CIRCUIT . . . . . . . . . . . . . . . . . . . . . 912

P2122-ACCELERATOR PEDAL POSITION

SENSOR 1 CIRCUIT LOW . . . . . . . . . . . . . . 919

P2123-ACCELERATOR PEDAL POSITION

SENSOR 1 CIRCUIT HIGH . . . . . . . . . . . . . . 926

P2127-ACCELERATOR PEDAL POSITION

SENSOR 2 CIRCUIT LOW . . . . . . . . . . . . . . 931

P2128-ACCELERATOR PEDAL POSITION

SENSOR 2 CIRCUIT HIGH . . . . . . . . . . . . . . 938

P2135-THROTTLE POSITION SENSOR 1/2

CORRELATION . . . . . . . . . . . . . . . . . . . . . . 943

P2138-ACCELERATOR PEDAL POSITION

SENSOR 1/2 CORRELATION . . . . . . . . . . . . 951

P2161-VEHICLE SPEED SENSOR 2

ERRATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . 957

P2166-ACCELERATOR PEDAL POSITION

SENSOR 1 MAXIMUM STOP
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 960

P2167-ACCELERATOR PEDAL POSITION

SENSOR 2 MAXIMUM STOP
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 961

P2172-HIGH AIRFLOW/VACUUM LEAK

DETECTED (INSTANTANEOUS
ACCUMULATION) . . . . . . . . . . . . . . . . . . . . 962

P2173-HIGH AIRFLOW/VACUUM LEAK

DETECTED (SLOW ACCUMULATION) . . . . . 973

P2174-LOW AIRFLOW/RESTRICTION

DETECTED (INSTANTANEOUS
ACCUMULATION) . . . . . . . . . . . . . . . . . . . . 984

P2175-LOW AIRFLOW/RESTRICTION

DETECTED (SLOW ACCUMULATION) . . . . . 995

P2181-COOLING SYSTEM

PERFORMANCE . . . . . . . . . . . . . . . . . . . . 1006

P2299-BRAKE PEDAL POSITION /

ACCELERATOR PEDAL POSITION
INCOMPATIBLE . . . . . . . . . . . . . . . . . . . . . 1013

P2302-IGNITION COIL 1 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1016

P2305-IGNITION COIL 2 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1020

P2308-IGNITION COIL 3 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1024

P2311-IGNITION COIL 4 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1028

P2314-IGNITION COIL 5 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1032

P2317-IGNITION COIL 6 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1036

P2320-IGNITION COIL 7 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1040

P2323-IGNITION COIL 8 SECONDARY

CIRCUIT- INSUFFICIENT IONIZATION . . . . 1044

P2503-CHARGING SYSTEM

OUTPUT LOW . . . . . . . . . . . . . . . . . . . . . . 1048

P3400-MDS RATIONALITY BANK 1

. . . . . . 1053

P3401-MDS SOLENOID 1 CIRCUIT

. . . . . . 1055

P3402–CYLINDER 1 DEACTIVATION

CONTROL PERFORMANCE . . . . . . . . . . . . 1060

P3425-MDS SOLENOID 4 CIRCUIT

. . . . . . 1064

P3426–CYLINDER 4 DEACTIVATION

CONTROL PERFORMANCE . . . . . . . . . . . . 1069

P3441-MDS SOLENOID 6 CIRCUIT

. . . . . . 1073

P3442–CYLINDER 6 DEACTIVATION

CONTROL PERFORMANCE . . . . . . . . . . . . 1078

P3449-MDS SOLENOID 7 CIRCUIT

. . . . . . 1082

P3450–CYLINDER 7 DEACTIVATION

CONTROL PERFORMANCE . . . . . . . . . . . . 1087

P3497-MDS RATIONALITY BANK 2

. . . . . . 1091

U0001-CAN C BUS

. . . . . . . . . . . . . . . . . . 1093

U0101-LOST COMMUNICATION

WITH TCM . . . . . . . . . . . . . . . . . . . . . . . . . 1095

U0114-LOST COMMUNICATION WITH FINAL

DRIVE CONTROL MODULE . . . . . . . . . . . . 1096

U0121-LOST COMMUNICATION WITH

ANTI-LOCK BRAKE MODULE . . . . . . . . . . . 1098

U0141-LOST COMMUNICATION WITH

FRONT CONTROL MODULE . . . . . . . . . . . 1100

U0155-LOST COMMUNICATION WITH

CLUSTER . . . . . . . . . . . . . . . . . . . . . . . . . . 1102

U0168-LOST COMMUNICATION WITH

SKREEM . . . . . . . . . . . . . . . . . . . . . . . . . . 1104

U110C-NO FUEL LEVEL BUS MESSAGE

RECEIVED . . . . . . . . . . . . . . . . . . . . . . . . . 1106

U110E-LOST AMBIENT TEMPERATURE

MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . 1108

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ENGINE ELECTRICAL DIAGNOSTICS

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U1110-LOST VEHICLE SPEED MESSAGE

. 1110

U1111-LOST ODOMETER MESSAGE

. . . . . 1112

U1113-LOST A/C PRESSURE MESSAGE

. . 1114

U1120-LOST WHEEL DISTANCE

MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . 1116

U1411-IMPLAUSIBLE FUEL VOLUME

SIGNAL RECEIVED . . . . . . . . . . . . . . . . . . 1118

U1412-IMPLAUSIBLE VEHICLE SPEED

SIGNAL RECEIVED . . . . . . . . . . . . . . . . . . 1120

U1413-IMPLAUSIBLE ODOMETER SIGNAL

RECEIVED . . . . . . . . . . . . . . . . . . . . . . . . . 1123

U1417-IMPLAUSIBLE LEFT WHEEL

DISTANCE SIGNAL RECEIVED . . . . . . . . . 1125

U1418-IMPLAUSIBLE RIGHT WHEEL

DISTANCE SIGNAL RECEIVED . . . . . . . . . 1128

*5.7L INTERMITTENT NO CRANK

CONDITION . . . . . . . . . . . . . . . . . . . . . . . . 1131

*CHECKING THE FUEL DELIVERY

SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . 1132

*HARD START FUEL SYSTEM

. . . . . . . . . . 1135

*ENGINE CRANKS BUT DOES NOT

START . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1138

*FUEL PRESSURE LEAK DOWN

. . . . . . . . 1142

*NO CRANK CONDITION

. . . . . . . . . . . . . . 1144

*NO RESPONSE WITH A NO START

CONDITION . . . . . . . . . . . . . . . . . . . . . . . . 1148

*START AND STALL CONDITION

. . . . . . . . 1154

STANDARD PROCEDURE

POWERTRAIN VERIFICATION TEST

. . . . . 1157

SCHEMATICS AND DIAGRAMS

. . . . . . . . . . . 1161

ENGINE ELECTRICAL DIAGNOSTICS

DIAGNOSIS AND TESTING

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ENGINE ELECTRICAL DIAGNOSTICS

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PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

Diagnostic Test

1.

NO RESPONSE

Make sure the scan tool will communicate with the appropriate modules.

Are you currently experiencing a NO RESPONSE condition?

Yes

>> The NO RESPONSE condition must be properly diagnosed before continuing.

Refer to the appropriate BUS Communication test in Section 8 ELECTRONIC CONTROL MODULES -
ELECTRICAL DIAGNOSTICS.

No

>> Go To 2

2.

NO START

Is the customer complaint a NO START condition?

Yes

>> Check the vehicle for any NO START related PCM DTC(s) or Vehicle Theft Security related DTC(s).

If no Theft related DTC(s) are present, refer to the Non DTC Diagnostic Procedures that relate to Fuel
and Starting.

No

>> Go To 3

3.

VEHICLE HISTORY AND TSB(s)

Continue by reading PCM DTC(s) and record the related Freeze Frame data if any DTC(s) are present.

Whether or not any DTC(s) are present you will want to check the following items which may assist in repairing the
customers complaint successfully.

Check the vehicles repair history.

If the vehicle has a repair history that pertains to the customer’s current complaint, review the repair.

Inpect the vehicle for any aftermarket accessories that may have been installed incorrectly.

Check for any TSB(s) related to the customer’s complaint or DTC(s).

If a TSB applies, follow the instructions per the TSB.

Choose the following scenario that best applies.

The TSB repaired the customers complaint.

Testing complete.

A DTC is present, no TSB applies, or the TSB didn’t repair the customers complaint.

Go To 4

No DTC(s) are present.

Refer to the INTERMITTENT CONDITION Diagnostic Procedure.

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ENGINE ELECTRICAL DIAGNOSTICS

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PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE (CONTINUED)

4.

WIRE HARNESS INSPECTION

Clear the DTC(s).

Attempt to duplicate the customer complaint.

Whether the customer complaint can be duplicated or not, make a quick wire harness inspection related to the
DTC(s) that were previously cleared.

Check the Powertrain Control Module connectors, the suspected component connection, in-line connectors, wire
harness splices, PCM power and ground circuits, and any related fuses.

If the DTC(s) are fuel or air related, check the fuel level and quality.

Were any repairs made that fixed the customer’s complaint?

Yes

>> Testing complete.

No

>> Refer to the diagnostic test procedure related to the DTC.

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ENGINE ELECTRICAL DIAGNOSTICS

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