Mazda CX-7 2007 Workshop Manual page 1454

NO.4 CANNOT TUNE (SEEK DOES NOT STOP)[RADIO]
4 Cannot tune (SEEK does not stop)/Possible DTC: 09:Er20, 09:Er22
• Center panel malfunction
• Antenna plug poor connection
• Antenna feeder malfunction
POSSIBLE
• Audio unit malfunction
CAUSE
• Electronic jamming from outside, or inferior condition of broadcasting station radio wave
• Antenna rod not installed
Diagnostic procedure
STEP
• Inspect if feel of SEEK button is normal when
1
button is pushed and released.
• Is it okay?
• Inspect indication of LCD.
2
• Is frequency indication increased or
decreased when SEEK button is pushed?
• Manually tune to local broadcasting station
3
and check reception condition.
• Is reception okay?
• Inspect antenna plug connection condition.
4
• Is connection okay?
• Turn ignition switch to LOCK position.
5
• Measure continuity between antenna feeder
axis and ground.
• Is there any continuity?
• Check if number of broadcasting stations
6
changes depending on time and place.
• Does it change?
End Of Sie
09-03E–8
SYMPTOM TROUBLESHOOTING [RADIO]
INSPECTION
Yes Go to the next step.
No Perform confirmation step 1: audio panel switch
confirmation. Replace center panel if necessary.
Yes Go to the next step.
No Perform confirmation step 1: audio panel switch
confirmation. Replace center panel if necessary.
Yes Go to the Step 6.
No Go to the next step.
Yes Go to the next step.
No Insert antenna plug securely.
Yes Replace antenna feeder.
No Go to the next step.
Yes The system is normal. (Explain to customer that SEEK
sometimes does not stop depending on signal reception
condition.)
Note
• Signals tend to reach longer distances at night. It is
conspicuous in AM signals, several audio functions
may stop due to foreign broadcasting station or noise.
Though the audio system restrains sensitivity of
SEEK and SCAN functions at night, the audio system
may select other than desired broadcasting station
when signals are considerably strong.This function is
linked to the parking light. When the parking light or
headlight is turned on, SEEK and SCAN may not
function for weak signals.
No Replace audio unit.
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