Jeep 200 Cherokee, Руководство по обслуживанию

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RADIO
For circuit descriptions and diagrams, refer to
8W-47 - Audio System in Group 8W - Wiring Dia-
grams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
CAUTION: The speaker output of the radio is a
“floating ground” system. Do not allow any speaker
lead to short to ground, as damage to the radio
may result.
(1) Check the fuse(s) in the junction block and the
Power Distribution Center (PDC). If OK, go to Step
2. If not OK, repair the shorted circuit or component
as required and replace the faulty fuse(s).
(2) Check for battery voltage at the fuse in the
PDC. If OK, go to Step 3. If not OK, repair the open
circuit to the battery as required.
(3) Turn the ignition switch to the On position.
Check for battery voltage at the fuse in the junction
block. If OK, go to Step 4. If not OK, repair the open
circuit to the ignition switch as required.
(4) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Remove the radio, but do not unplug the radio wire
harness connectors. Check for continuity between the
radio chassis and a good ground. There should be
continuity. If OK, go to Step 5. If not OK, repair the
open radio chassis ground circuit as required.
(5) Connect the battery negative cable. Turn the
ignition switch to the On position. Check for battery
voltage at the fused ignition switch output (accesso-
ry/run) circuit cavity of the left (gray) radio wire har-
ness connector. If OK, go to Step 6. If not OK, repair
the open circuit as required.
(6) Turn the ignition switch to the Off position.
Check for battery voltage at the fused B(+) circuit
cavity of the left (gray) radio wire harness connector.
If OK, replace the faulty radio. If not OK, repair the
open circuit to the Ignition-Off Draw (IOD) fuse as
required.
SPEAKER
For circuit descriptions and diagrams, refer to
8W-47 - Audio System in Group 8W - Wiring Dia-
grams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
CAUTION: The speaker output of the radio is a
“floating ground” system. Do not allow any speaker
lead to short to ground, as damage to the radio
may result.
(1) Turn the ignition switch to the On position.
Turn the radio on. Adjust the balance and fader con-
trols to check the performance of each individual
speaker. Note the speaker locations that are not per-
forming correctly. Go to Step 2.
(2) Turn the radio off. Turn the ignition switch to
the Off position. Disconnect and isolate the battery
negative cable. Remove the radio from the instru-
ment panel. If the vehicle is equipped with the Infin-
ity speaker package, also unplug the wire harness
connectors at the amplifier. Check both the speaker
feed (+) circuit and return (–) circuit cavities for the
inoperative speaker location(s) at the radio wire har-
ness connectors for continuity to ground. In each
case, there should be no continuity. If OK, go to Step
3. If not OK, repair the shorted speaker circuit(s) as
required.
(3) If the vehicle is equipped with the Infinity
speaker package, go to Step 6. If the vehicle is
equipped with the standard speaker system, check
the resistance between the speaker feed (+) circuit
and return (–) circuit cavities of the radio wire har-
ness connectors for the inoperative speaker loca-
tion(s). The meter should read between 2 and 12
ohms (speaker resistance). If OK, go to Step 4. If not
OK, go to Step 5.
(4) Install a known good radio. Connect the bat-
tery negative cable. Turn the ignition switch to the
On position. Turn on the radio and test the speaker
operation. If OK, replace the faulty radio. If not OK,
turn the radio off, turn the ignition switch to the Off
position, disconnect and isolate the battery negative
cable, remove the test radio, and go to Step 5.
(5) Unplug the speaker wire harness connector at
the inoperative speaker. Check for continuity
between the speaker feed (+) circuit cavities of the
radio wire harness connector and the speaker wire
harness connector. Repeat the check between the
speaker return (–) circuit cavities of the radio wire
harness connector and the speaker wire harness con-
nector. In each case, there should be continuity. If
8F - 4 AUDIO SYSTEMS
XJ
DIAGNOSIS AND TESTING (Continued)