Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is a built in part of the driver door switch assembly (DDSA). This assembly contains a microprocessor which takes the signal generated by the switch and assigns a digital message to the switch signal. The DDSA then sends this message over the Serial Data Class 2 line to the driver door module (DDM) and the passenger front door module (PDM) to move the mirrors. The DDM and the PDM then apply voltage and ground to the appropriate circuit of their respective mirror fold motor to fold/retract or unfold/extend the mirrors. The mirror fold motors are reversible.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1717 Mirror Power Fold Control Switch Circuit Low
Conditions for Running the DTC
The self diagnostic test runs once every 30 seconds regardless of source voltage.
Conditions for Setting the DTC
If the DDSA detects that the switch is closed for more than 30 continuous seconds, it sets this DTC.
Action Taken When the DTC Sets
The DDSA deactivates and ignores inputs from the failed switch contacts and stops sending messages for this switch to the DDM and the PFDM. The DDSA will continue to respond to inputs from other non-failed switch contacts.
Conditions for Clearing the DTC
The DDSA clears this DTC when the switch message status changes.
Diagnostic Aids
An intermittently sticking or binding switch may cause this DTC to set. Refer to Testing for Electrical Intermittents in Wiring Systems.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Outside Rearview Mirror Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool display the Idle state? | Go to Step 3 | Go to Step 4 |
3 |
Does the Mirror Fold Switch parameter change state? | Go to Diagnostic Aids | Go to Step 4 |
4 | Inspect for poor connections at the driver door switch assembly (DDSA) harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
5 | Replace the DDSA. Refer to Front Door Switch Replacement . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the DTC reset? | Go to Step 2 | System OK |
