Engine Controls - Long Crank/DTC's In Memory: Overview

BULLETIN NO.: 98-T-02

ISSUE DATE: February, 1998

GROUP/SEQ. NO.: Electrical-01

CORPORATION NO.: 886002

SUBJECT:
DTCs P0201, P0202, P0203, P0204, P0443, P0449, P1691, P1693 with an Extended Cranking Time and/or Start then Stall (Replace Ignition and Start Switch)

MODELS AFFECTED:
1998 Saturns built up to and including VIN WZ174921

CONDITION:

Vehicle may have an extended cranking time and/or start then stall during cold ambient temperatures. Diagnostic trouble codes (DTCs) P0201, P0202, P0203, P0204, P0443, P0449, P1691, P1693 may set while the engine is being started. Condition is more likely to occur as the ambient temperature drops below 0°C (32°F).

CAUSE:

Ignition voltage on circuit 3C, from the ignition and start switch, may drop out momentarily when the engine is first started. Loss of voltage on this circuit for a certain duration will cause the above DTCs to be recorded in the PCM malfunction history. When the PCM detects a loss of voltage during start-up, the proper fuel delivery cannot be maintained, which could lead to the conditions mentioned in this bulletin.

CORRECTION:

Refer to malfunction history records to verify that the DTCs were stored during engine start-up. If DTCs were caused by the ignition and start switch dropout, the "Eng. On Time" will generally be less than two seconds. If verified, refer to the following procedure in this bulletin to replace the ignition and start switch.

If "Eng. On Time" is greater than two seconds, refer to the "1998 Powertrain Controls Service Manual" for diagnostic procedures.

If the vehicle condition is not related to the condition described in this bulletin and/or if additional DTCs have set, they must also be diagnosed and repaired before returning the vehicle to the customer. Refer to the appropriate service manual for diagnostic procedures.

PARTS REQUIREMENTS:

21024682 Switch Asm-Ign & Start

CLAIM INFORMATION:





To receive credit for this repair during the warranty coverage period submit a claim through the Saturn Dealer System as shown.