DTC P1530 - Ignition Timing Adjustment Switch CKT Malfunction
WARNING: This page is about a different car, the 1996 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
Ensure test switch terminal of test connector (located in relay/fuse box) is not grounded by a jumper wire. See Fig 1 . Remove jumper wire if necessary. Turn ignition on. Using a voltmeter, measure voltage between ground and terminal "E" of test connector. If reading is 10-14 volts, check for an intermittent problem. See TESTS W/O CODES article. If reading is not as specified, check Purple/White wire for short to ground. Repair as necessary. If wire is okay, replace PCM. Retest system.