1995 JEEP YJ ignition

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Page 1435 of 2158

JEEP YJ 1995  Service And Repair Manual ²The PCM opens the ground circuit to the A/C
clutch relay to disengage the A/C compressor clutch.
This will be done for approximately 15 seconds (if the
air conditioning system is operating).
If the

Page 1437 of 2158

JEEP YJ 1995  Service And Repair Manual MULTI-PORT FUEL INJECTION (MFI)ÐGENERAL DIAGNOSIS
INDEX
page page
Automatic Shutdown (ASD) Relay Testing....... 46
Camshaft Position Sensor Test............... 46
Crankshaft Position Sensor Test.....

Page 1438 of 2158

JEEP YJ 1995  Service And Repair Manual Ignition System. Connect vehicle to an oscilloscope
and inspect spark events for fouled or damaged spark
plugs or cables.(6) Verify that generator output wire, generator
connector and ground wire are

Page 1448 of 2158

JEEP YJ 1995  Service And Repair Manual AUTOMATIC SHUTDOWN (ASD) RELAY TESTING
To perform a complete test of the ASD relay and its
circuitry, refer to the DRB scan tool and appropriate
Powertrain Diagnostics Procedures manual. To test
the r

Page 1449 of 2158

JEEP YJ 1995  Service And Repair Manual Test the resistance of the wire harness. Do this be-
tween the powertrain control module (PCM) wire
harness connector terminal-2 and the sensor connec-
tor terminal. Also test terminal-4 to the sensor

Page 1450 of 2158

JEEP YJ 1995  Service And Repair Manual EXTENDED IDLE SWITCH TEST
OPTIONAL POLICE PACKAGE ONLY
OPERATION
The extended idle switch is used to raise the en-
gine idle speed to approximately 1000 rpm when the
shifter is in either the Park or N

Page 1451 of 2158

JEEP YJ 1995  Service And Repair Manual IDLE AIR CONTROL MOTOR TEST
Idle air control (IAC) motor operation can be tested
using special exerciser tool number 7558 (Fig. 41).
CAUTION: Proper safety precautions must be taken
when testing the i

Page 1455 of 2158

JEEP YJ 1995  Service And Repair Manual line. However, these could result in a rich or lean
condition causing an oxygen sensor DTC to be stored
in the PCM.
Secondary Ignition Circuit:The PCM cannot
detect an inoperative ignition coil, foule