DTC 0605

ON BOARD DIAGNOSIS LOGIC
It a misfire occurs, the engine speed will fluctuate. If the fluctuation is detected by the crankshaft position sensor (OBD), the misfire is diagnosed.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Warm-up three Way Catalyst Damage)
When a misfire is detected which will overheat and damage the three way catalyst, the malfunction indicator lamp (MIL) will start blinking; even during the first trip. In this condition, ECM monitors the misfire every 200 revolutions.
If the misfire frequency decreases to a level that will not damage the three way catalyst, the MIL will change from blinking to lighting up.
(After the first trip detection, the MIL will light up from engine starting. If a misfire is detected that will cause warm-up three way catalyst damage, the MIL will start blinking.)
2. Two Trip Detection Logic (Exhaust quality deterioration)
When a misfire that will not damage the three way catalyst (but will affect exhaust emission) occurs, the malfunction indicator lamp will light up based on the second consecutive trip detection logic. In this condition, ECM monitors the misfire for every 1,000 revolutions of the engine.






DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE (Overall)
WITH CONSULT
(1) Turn ignition switch "ON", and select "DATA MONITOR" mode with CONSULT.
(2) Start engine and warm it up sufficiently.
(3) Turn ignition switch "OFF" and wait at least 3 seconds.
(4) Start engine again and drive at 1,500 - 3,000 rpm for at least 3 minutes. Hold the accelerator pedal as steadily as possible during driving.

NOTE: Refer to the freeze frame data for the test driving conditions.

OR

WITH GST
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 3 seconds.
(3) Start engine again and drive at 1,500 - 3,000 rpm for at least 3 minutes.
(4) Select "MODE 7" with GST.
Hold the accelerator pedal as steadily as possible during driving.

NOTE: Refer to the freeze frame data for the test driving conditions.

OR

WITHOUT SCAN TOOLS
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 3 seconds.
(3) Start engine again and drive at 1,500 - 3,000 rpm for at least 3 minutes.
(4) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Hold the accelerator pedal as steadily as possible during driving.














DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Ignition Wires






1. Inspect wires for cracks, damage, burned terminals and for improper fit.
2. Measure the resistance of wires to their distributor cap terminal. Move each wire while testing to check for intermittent breaks.

Resistance: 13.6 - 18.4 K Ohms/m
(4.15 - 5.61 K Ohms/ft) at 25°C (77°F)

If the resistance exceeds the above specification, inspect ignition wire to distributor cap connection. Clean connection or replace the ignition wire with a new one.