With Scan Tool

1. Checking The Switch's Grounding





Unplug the connector H6-8





Connect test lamp 86 11 857 to B+ and pin 2 of the female connector.

Go to step 2

2. Checking The Switch's Grounding

Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent brakes and short circuits in the wiring harness. Observe the multimeter test lamp or diagnostic tool while doing this.





The test lamp should light.

Is the function correct?

NO
Go to step 8

YES
Go to step 3

3. Checking the fault symptoms

Select the defective function

Switch SPORT
Go to step 4

Switch WINTER
Go to step 12

4. Checking The Lead From Switch To Control Module





Turn the ignition switch to the on position.





Contact the TCM

Read value:
SPORT Switch

The reading should be: OFF

Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent brakes and short circuits in the wiring harness. Observe the multimeter test lamp or diagnostic tool while doing this.

Is the function correct.

NO
Go to step 6

YES
Go to step 5

5. Checking The Lead From Switch To Control Module





Connect a jumper lead between pins 2 and 4 on the female connector.

Read Value:
SPORT Switch:

The reading should be: ON

Is the function correct.

NO
Go to step 6

YES
Go to step 7

6. Rectifying the Lead

Repair or replace the lead between connector H6-8, pin 4 and TCM control module pin 7.

When repair is complete:
Go to step 9

7. Changing Components





Change switch SPORT.

When repair is complete:
Go to step 9

8. Rectifying The Lead

Repair or replace the lead between connector H6-8, pin 2 and grounding point G34P.

When repair is complete:
Go to step 9

9. Final Check





Clear the diagnostic trouble codes in all systems.

Carry out a function test.

Is the function correct.

NO
Go to step 11

YES
Go to step 10

10. Final Check

The steps taken to rectify the fault were correct.
Diagnosis is complete.

11. Final Check

Diagnosis of this fault code is complete.
Refer to Transmission Control Systems, Testing and Inpection, Procedures for Before Changing A Control Module.

12. Checking The Lead From Switch To Control Module





Turn the ignition switch to the on position.





Contact the TCM

Read value:
WINTER Switch

The reading should be: OFF

Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent brakes and short circuits in the wiring harness. Observe the multimeter test lamp or diagnostic tool while doing this.

Is the function correct.

NO
Go to step 13

YES
Go to step 14

13. Rectifying the Lead

Repair or replace the lead between connector H6-8, pin 1 and TCM control module pin 22.

When repair is complete:
Go to step 9

14. Checking The Lead From Switch To Control Module





Connect a jumper lead between pins 2 and 4 on the female connector.

Read Value:
WINTER Switch:

The reading should be: ON

Is the function correct.

NO
Go to step 16

YES
Go to step 15

15. Changing Components





Change WINTER switch.

When repair is complete:
Go to step 9

16. Rectifying The Lead

Repair or replace the lead between connector H6-8, pin 1 and TCM control module pin 22.

When repair is complete:
Go to step 9