9-3 SS & SC DTC P1681, P0638 and/or P2135 TA248-1108 TRIONIC UPDATE

Title:TRIONICs- Updated 09/20/2013 Check Engine Lamp Illuminated and DTC P1681, P0638 and/or P2135 set. TA248-1108

Date: 01/21/2014

To: OSCs

From: SPNA TAC

______________________________________________

[FONT=Arial]Updated 09/20/2013: When diagnosing a repeat P0638/P2176 do not overlook junctions J34/J35 in the engine wiring harness and connectors H42-2/H42-3 under the battery.[/FONT][FONT=Arial][/FONT][FONT=Arial]If you experience a repeat DTC it can be a problem with any of the connectors or junctions; they can also prevent/block the Throttle Test from occurring during the diagnostic process.[/FONT]
[FONT=Trebuchet MS]This TA is published in WIS and is copied here for your convenience.[/FONT]
[FONT=Trebuchet MS]TECHNICAL ADVICE[/FONT][FONT=Trebuchet MS] - Quick information for your help[/FONT]
[FONT=Trebuchet MS]Bulletin Nbr: [/FONT][FONT=Trebuchet MS]TA248-1108[/FONT]
[FONT=Trebuchet MS]Date: March 2011[/FONT]
[FONT=Trebuchet MS]Market: All[/FONT]
[FONT=Trebuchet MS]Check Engine lamp illuminated and DTC P1681, P0638 and/or [/FONT][FONT=Trebuchet MS]P2135[/FONT][FONT=Trebuchet MS] set[/FONT]
[FONT=Trebuchet MS]VEHICLES CONCERNED[/FONT]
[FONT=Trebuchet MS]Saab 9-3 SS, SC, CVMY07 and later, (mainly MY09 produced during late 2008) with B207 engine independent of engine variant..[/FONT]
[FONT=Trebuchet MS]BACKGROUND[/FONT]
[FONT=Trebuchet MS]Check engine lamp is illuminated, and DTC P1681, P0638, [/FONT][FONT=Trebuchet MS]P2135[/FONT][FONT=Trebuchet MS] is stored in the T8 ECM. The root cause to the DTC is most likely caused by the sensitivity of the throttle body position sensor in combination with variables in throttle control strategy.[/FONT]
[FONT=Trebuchet MS]ACTION[/FONT]
[FONT=Trebuchet MS]If DTC P1681 is detected together with P0638 and/or DTC [/FONT][FONT=Trebuchet MS]P2135[/FONT][FONT=Trebuchet MS], the throttle housing P/N 9318 9207 and gasket P/N9053 7718 could be replaced without further fault tracing.[/FONT]
[FONT=Trebuchet MS]If only DTC P1681 is detected proceed as follows: Connect TECH 2 and start in the snap shot mode (throttle area (mm2), engine speed, and requested air). Drive the vehicle on a flat road with constant speed and engine load to record the snap shot during driving. If the value for the throttle is fluctuating during driving it is most likely a faulty throttle housing is the root cause and should be replaced together with gasket.[/FONT]
[FONT=Trebuchet MS]If the throttle area does not fluctuate, follow the fault tracing in WIS for DTC 1681 before further remedies.[/FONT]
[FONT=Trebuchet MS]If the ECM was replaced previously for dtc P1681 and no fluctuating of the throttle is noted when tested using the above procedure, proceed with Throttle body and gasket replacement.[/FONT]
[FONT=Times New Roman]NOTE: This TA is published in WIS under: 9-3 (9440) / 2009 / Engine / 4-cyl petrol/E85 (Engine management system Trionic T8) / Bulletins - SI/MI / (TA248-1108) Check Engine lamp illuminated and DTC P1681, P0638 and/or [/FONT][FONT=Times New Roman]P2135[/FONT][FONT=Times New Roman] set[/FONT]