P050B

DTC P050B Cold Start Ignition Timing Performance

DESCRIPTION

DTC Detection Condition:

This monitor will run when the engine is started with the engine coolant temperature at -10 to 50 °C (14 to 122 °F). The DTC will be set after the engine idles for 13 seconds (2 trip detection logic).

The DTC is designed to monitor the ignition timing at cold start. When the engine is started with the engine coolant temperature at lower than 50 °C (122 °F), the ECM (PCM) checks the ignition timing at the engine idling. If the ignition timing advances beyond the criteria within 10 seconds, the ECM (PCM) interprets this as a malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 trip detection logic).

NOTE: When the negative battery terminal is disconnected during inspections or repairs, the ISC (Idle Speed Control) learning values are cleared. This DTC cannot be set with the ISC learning values cleared.

The ISC learning is performed when the engine is warmed up and has been idling for 5 minutes.

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunctions Thresholds:

MONITOR DESCRIPTION

Step 1-2:

Step 2(Continued)-5:

Step 5(Continued)-13:

Step 14-15:

INSPECTION PROCEDURE






HINT: DTC P050B may be set when the engine has the symptoms listed. If necessary, check the trouble area listed.