Pinpoint Test Aa: The SELECTABLE Drive Mode Feature Is Inoperative, Cannot Be Enabled Or Disabled

WARNING: This page is about a different car, the 2021 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions

The selectable drive mode switch is part of the instrument panel console switch assembly and is hardwired to the HVAC control module. When the drive mode switch is pressed, the HVAC control module receives a ground signal and sends a message to the GWM over the MS-CAN. The GWM relays the message to the ABS module over the HS-CAN2. If the ABS module does not receive any messages within a certain time frame (usually less than 1 second) or if the message contains invalid information, the ABS module sets a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS P05D3:86	Driver Mode Select Switch "A" Range/Performance: Signal Invalid	Sets when the selectable drive mode switch button has been pressed for longer than 30 seconds. This can be due to a circuit failure, an instrument panel console switch assembly internal failure, an internal failure of the HVAC control module or a network communication concern.

Possible Sources

Wiring, terminals or connectors.
Instrument panel switch assembly
Network concern
HVAC control module

AA1 CHECK THE HVAC CONTROL MODULE COMMUNICATIONS
- Ignition ON.
- Using a diagnostic scan tool, carry out the HVAC control module self-test.
- Retrieve and record all HVAC control module Diagnostic Trouble Codes (DTCs).
Does the HVAC control module communicate with the diagnostic scan tool?

Yes GO to AA2

No DIAGNOSE the HVAC control module does not communicate with the diagnostic scan tool. REFER to: COMMUNICATIONS NETWORK .

AA2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Review the results from the previous step.

Are there any Diagnostic Trouble Codes (DTCs) present and active in the HVAC control module?

Yes	DIAGNOSE all HVAC control module Diagnostic Trouble Codes (DTCs). REFER to: CLIMATE CONTROL SYSTEM - VEHICLES WITH: DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) /CLIMATE CONTROL SYSTEM - VEHICLES WITH: ELECTRONIC MANUAL TEMPERATURE CONTROL (EMTC) .

GO to AA3

AA3 CHECK THE INSTRUMENT PANEL CONSOLE SWITCH GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect HVAC Module C228A.

Disconnect Instrument panel console switch assembly C3010.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3010-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to AA4

No	REPAIR the circuit.

AA4 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3010-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit for a short to voltage. CLEAR any Diagnostic Trouble Codes (DTCs) from the HVAC control module.

GO to AA5

AA5 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3010-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to AA6

No	REPAIR the circuit.

AA6 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR AN OPEN CIRCUIT

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3010-1	Courtesy of FORD MOTOR COMPANY	C228A-14

Is the resistance less than 3 ohms?

Yes	REPAIR the circuit.

No	INSTALL a new instrument panel console switch assembly.