Note. Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ). Check the connectors for poor connections or loose terminals.
- Turn the ignition switch to ON (II).
- Turn on the audio unit and check the audio remote switch operation (volume up, volume down, CH +, CH -, MODE). Is the audio unit operation OK? YES -Intermittent failure, the audio remote switch is OK at this time. Check for loose connections. NO -Go to step 3.
- Turn the ignition switch to LOCK (0).
- Do the audio remote switch test (see «AUDIO REMOTE SWITCH TEST»(ref-360324-S23578522112010042800000) ). Is the audio remote switch OK? YES -Go to step 5. NO -Replace the audio remote switch (see «AUDIO REMOTE SWITCH REPLACEMENT»(ref-360324-S08939560292010042800000) ), and recheck.
- Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(ref-360324-S16175579992010042800000) ).
- Disconnect audio unit connector A (24P). NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.
- Reconnect the audio remote switch, and measure the resistance between audio unit connector A (24P) terminals No. 5 and No. 16 as specified in the table. AUDIO REMOTE SWITCH TABLE Position VOL DOWN VOL UP CH (-) CH (+) MODE No button pressed Resistance about 100 ohms about 357 ohms about 775 ohms about 1.7 kO about 3.7 kO about 3.7 kO Is the resistance OK? YES -Go to step 8. NO -Repair a short or open or high resistance in the circuit between the audio unit and the cable reel. If the wires are OK, replace the cable reel (see «CABLE REEL REPLACEMENT»(ref-360291-S36823172832010042800000) ).
- Check for continuity between body ground and audio unit connector A (24P) terminals No. 5 and No. 16 individually. Is there continuity? YES -Repair a short to body ground in the wire(s) between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel (see «CABLE REEL REPLACEMENT»(ref-360291-S36823172832010042800000) ). NO -Replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(ref-360324-S16175579992010042800000) ).