Ignition System Fault Codes

IGNITION SYSTEM FAULT CODES

Code

Fault

Repair

1-1-1

No Faults detected by diagnostic system.

N/A

1-4-2

Bad ECU. Engine operates in "Limp Home" mode.

Replace ECU

1-4-3

Knock Sensor Signal missing/incorrect. "Limp home" mode selected by control unit if signal not received from knock sensor during 48-rev- olution period W/engine speeds above 3000 RPM.

⁽¹⁾

1-4-4

Fuel System Load Signal missing. Ign. setting depends on signal strength. "Limp Home" mode selected if missing load signal from fuel control unit in 32 consecutive firing pulses.

⁽¹⁾

2-1-4

Impulse sensor signal sporadically missing.

⁽¹⁾

2-2-4

Engine temp. signal missing/incorrect "Limp Home" mode selected by control unit if signal is missing. The engine is considered hot.

⁽²⁾ Check Temp. Sens.

2-3-4

Throttle Switch Signal missing or incorrect. Fault code registered when, during more than 16 consecutive firing impulses, control unit receives signals from throttle sw. at same time as eng. speed > 2600 rpm & load signal exceeds a predetermined limit, or doesn't receive any signal from throttle sw. during deceleration under fuel cut-off conditions.

N/A

2-4-1

EGR sys. malfunction. EGR temp. sensor senses flow of exhaust gas back to eng. is too small

N/A

4-1-3

EGR temp. sens. signal missing or incorrect. Fault code is registered if ECU doesn't receive correct signal from EGR system .

N/A

⁽¹⁾	See IGNITION SYSTEM FAULT CODE TESTING in this article.

⁽²⁾	See SYSTEM/COMP TESTS article.Engine operates in "limp home" mode.