Jeep Grand Cherokee WK. Manual — part 1066
P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN (CONTINUED)
5.
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT
Remove the jump wire.
Ignition on, engine not running.
With the scan tool, monitor the 1/2 O2 Sensor voltage.
Is the voltage above 4.8 volts?
Yes
>> Go To 6
No
>> Check the (K141) O2 Sensor 1/2 Signal circuit for an open
or short to voltage. Inspect the O2 Sensor connector and
the PCM harness connector. If OK, replace and program
the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
9 - 860
ENGINE ELECTRICAL DIAGNOSTICS
WK
P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN (CONTINUED)
6.
(K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the C3 PCM harness connector.
Measure the resistance between ground and the (K299) O2 Sensor
1/2 Heater Control circuit from the O2 Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Repair the short to ground in the (K299) O2 Sensor 1/2
Heater Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 7
WK
ENGINE ELECTRICAL DIAGNOSTICS
9 - 861
P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN (CONTINUED)
7.
(K904) O2 RETURN DOWNSTREAM CIRCUIT
Measure the voltage on the (K904) O2 Return Downstream circuit in
the O2 Sensor harness connector.
Is the voltage at 2.5 volts?
Yes
>> Check the fuel system for contaminants.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Check the (K904) O2 Return Downstream circuit for a
short to ground, open, or short to voltage. Inspect the O2
Sensor connector and the PCM harness connector. If OK,
replace and program the Powertrain Control Module per
Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
9 - 862
ENGINE ELECTRICAL DIAGNOSTICS
WK
P2097-DOWNSTREAM FUEL TRIM SYSTEM 1 RICH
WK
ENGINE ELECTRICAL DIAGNOSTICS
9 - 863
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст