Code 4, 8, 0R 9: TDC/CYL/Crank Sensor
- Turn ignition off. Remove BACK UP fuse from under hood fuse/relay box for 10 seconds to reset ECU. Check ECU for fault codes. See RETRIEVING CODES . If Code 4, 8 or 9 is not present, problem is intermittent. Check for poor connections at ECU, distributor and connector C308 at left shock tower. Test drive vehicle and retest.
- If CHECK ENGINE light is on and indicates Code 4, 8 or 9, turn ignition off. Disconnect 6-pin connector from TDC/CYL/CRANK sensor connector at distributor. See Fig 1
. Check resistance between terminals of each sensor. See INPUT SIGNAL & RESISTANCE TEST TERMINALS
table. If resistance is not 650-850 ohms, replace distributor sub-assembly. If resistance is 650-850 ohms, go to step 3).INPUT SIGNAL & RESISTANCE TEST TERMINALS
Sensor Code ECU Terminals Sensor Terminals CRANK 4 B15 E CRANK 4 B16 B CYL 9 B11 F CYL 9 B12 C TDC 8 B13 D TDC 8 B14 A - Check continuity to body ground on each terminal. If continuity exists, replace TDC/CYL/CRANK sensor. If continuity does not exist, reconnect 6-pin connector. Connect ECU Test Harness (07LAJ-PT3010A ) to ECU connector, leaving ECU disconnected. Check resistance between terminals of each sensor at ECU Test Harness. See INPUT SIGNAL & RESISTANCE TEST TERMINALS table.
- If resistance is not 650-850 ohms, repair open in faulty circuit. If resistance is 650-850 ohms, check for continuity to body ground on test terminals B11 and B13. If continuity exists on any terminal, repair short circuit. If continuity does not exist, substitute a known good ECU. If symptom/condition goes away, replace original ECU.