Lebaron Town & Country L4-135 2.2L SOHC Turbo VIN E FI (1985)
Fuel Injector: Testing and Inspection
No Start Test (Injectors)
Test 10, Checking Injector System For Fault Codes
1.
Connect diagnostic read-out tool to engine test connector, then disconnect and reconnect battery quick disconnect.
2.
Crank engine for 7 seconds, then turn ignition switch off.
3.
Place system into Diagnostic Mode and record all codes.
4.
If code sequence is 88-12-26-55, proceed to Test 11.
5.
If code sequence is 88-12-27-55, proceed to Test 12.
Test 11-Step A, Fault Code 26 - Injectors 1 & 2
1.
Connect diagnostic read-out tool to engine test connector.
2.
Turn ignition switch off, then connect a voltmeter between white wire of injector 6-way connector and ground.
3.
Disconnect electrical connectors from injector Nos. 3 and 4 and red connector from logic module.
4.
Connect one end of a jumper wire to red connector terminal No. 2, then turn ignition switch to Run position.
5.
Press ATM button on read-out tool, then make and break jumper wire connection to ground several times.
6.
If voltmeter pulsates as connection is made, replace logic module.
CAUTION: Before replacing the logic module make sure the terminal in cavity No. 2 is not crushed so that it cannot touch the logic module
pin.
7.
If voltmeter does not pulsate as connection is made, proceed to Test 11 step B.
Test 11-Step B, Checking Injector 1 & 2 Control Wire
1.
With logic module red connector disconnected and ignition switch off, disconnect power module 12-way connector.
2.
Connect an ohmmeter between terminal No. 2 of red connector and terminal No. 1 of 12-way connector.
3.
If ohmmeter indicates continuity, proceed to Test 11 step C.
4.
If ohmmeter does not indicate continuity, locate and repair open in circuit between connectors.
Test 11-Step C, Injector 1 & 2 Driver Circuit
1.
Turn ignition switch Off, then disconnect power module 10-way connector.
2.
Connect an ohmmeter between terminal Nos. 5 and 6 of connector.
3.
If ohmmeter indicates continuity, proceed to Test 11 step D.
4.
If ohmmeter does not indicate continuity, locate and repair open in circuit from terminal No. 5 or 6.
NOTE: If wire in cavity No. 6 is the open one the problem is between the injector harness and where it splices into the main harness.
Test 11-Step D, Checking For A Shorted Injector
1.
Disconnect injector 6-way connector, then connect an ohmmeter between white wire of connector and ground.
2.
If ohmmeter does not indicate continuity, replace power module.
CAUTION: Before replacing the power module make sure the terminals of the power module connectors are not spread apart so they cannot
touch the power module pins.
3.
If ohmmeter indicates continuity, disconnect injector No. 1 connector. Replace injector No. 2 if continuity still exists or injector No. 1 if it does
not.
Test 12-Step A, Fault Code 27 - Injector 3 & 4
1.
Connect diagnostic read-out tool to engine test connector.
2.
Turn ignition off, then connect a voltmeter between tan wire of injector 6-way connector and ground.
3.
Disconnect electrical connectors from injector Nos. 1 and 2.
4.
Disconnect red connector from logic module, then connect one end of a jumper wire to terminal No. 3 of connector.
5.
Press ATM button on read-out tool, then make and break jumper wire connection to ground several times.
6.
If voltmeter pulsates as connection is made, replace logic module.
CAUTION: Before replacing the logic module make sure the terminal in cavity No. 3 is not crushed so that it cannot touch the logic module
pin.
7.
If voltmeter does not pulsate as connection is made, proceed to Test 12 step B.
Test 12-Step B, Checking Injector 3 & 4 Control Wire
