U2003

: U2003; COMPACT DISC CHANGER NOT RESPONDING

G239843t233 : CHECK THE CD CHANGER MODULE, USING THE OPTICAL BUS TESTER
1. Connect the optical bus tester to the fibre optic lead connector DB02.
2. Set the optical bus tester to BY-PASS.
3. CLEAR the DTC.
4. Turn the ignition switch to the ACC position.
5. Wait for 10 seconds.
6. Check for 'not responding' DTCs.

- Is U2003 set?

-> Yes
For 'wake-up' signal circuit tests, [[G239843p5]].

-> No

G239843t234 : CHECK FOR DTC U2602 OR U2603
1. Check DTCs.

- Are codes U2602 or U2603 logged?

-> Yes
For optical ring tests, [[G239843p29]], and [[G239843p30]].

-> No
Recheck DTCs. No break in optical harness.