B1406, B1407, B1408
Symptom: TCS OFF lamp on, TCS system inoperative and possibly trouble codes in MOTRONIC.
B1406, B1407, B1408 |
Fault symptom
TCS OFF lamp on, TCS system inoperative and possibly trouble codes in MOTRONIC.Condition
For trouble code B1406: Main throttle butterfly position signal from pin 54 of the MOTRONIC control module to pin 11 of the TCS control module incorrect.For trouble code B1407: Main throttle butterfly position signal from pin 54 of the MOTRONIC control module to pin 11 of the TCS control module shorted to ground.
For trouble code B1408: Main throttle butterfly position signal from pin 54 of the MOTRONIC control module to pin 11 of the TCS control module shorted to battery + or no continuity.
Diagnostic procedure
1. |
If the CHECK ENGINE
lamp (MIL) is also on, obtain a reading of the trouble codes in the MOTRONIC system, see
Service Manual 2:7 MOTRONIC 2.8.1
.
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2. |
Connect the ISAT and select "MAIN THROTTLE POS" in the "OBTAIN
READOUTS" menu. Drive the car and check that the ISAT shows about. 9%%at idling speed
and about 70-92%% at full throttle.
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