AcuraLink Service Application Does Not Work
AcuraLink service application does not work1. Check the No. 21 (10 A) fuse and No. 32 (10 A) fuse in the driver's under-dash fuse/relay box.
Are the fuses OK?
YES - Go to step 2.
NO - Replace the fuse(s), and recheck.
2. Turn the ignition switch to ACC (I).
3. Measure the voltage between the No. 2 terminal of the AcuraLink control unit connector A (20P) and body ground.
Is there battery voltage?
YES - Go to step 4.
NO - Repair open in the wire(s) between the AcuraLink control unit and the No. 32 (10 A) fuse in the driver's under-dash fuse/relay box.
4. Turn the ignition switch ON (II).
5. Measure the voltage between the No. 12 terminal of the AcuraLink control unit connector A (20P) and body ground.
Is there battery voltage?
YES - Go to step 6.
NO - Repair open in the wire(s) between the AcuraLink control unit and the No. 21 (10 A) fuse in the driver's under-dash fuse/relay box.
6. Turn the ignition switch OFF.
7. Measure the voltage between the No. 11 terminal of the AcuraLink control unit connector A (20P) and body ground.
Is there less than 1 V?
YES - Check for loose wires or poor connections at the AcuraLink control unit connector A (20P). If the connections are good, substitute a known-good AcuraLink control unit, and recheck. If the symptom goes away, replace the original AcuraLink control unit.
NO - Check for an open in the wire between the AcuraLink control unit and body ground. If the wire is OK, check for poor ground at G602.