B1969–POWER LIFTGATE OPEN DIRECTION EXCESSIVE POSITION SENSOR COUNTS

For a complete wiring diagram Refer to Section 8W

When Monitored:
During Power Liftgate opening cycle.
Set Condition:
If the Power Liftgate Module detects that the Power Liftgate Drive Unit has generated excessive pulses during a full (open/close) power cycle, this code will set.

Possible Causes

(Q51) FULL OPEN SWITCH CIRCUIT OPEN

(Q901) LOGIC GROUND OPEN

POWER LIFTGATE DRIVE UNIT

POWER LIFTGATE MODULE

Diagnostic Test

1.DTC PRESENT

Does the scan tool display B1969–POWER LIFTGATE OPEN DIRECTION EXCESSIVE POSITION SENSOR COUNTS?

Yes

Go To2

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the liftgate several times and check for any binding conditions.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

2.BINDING LIFTGATE

Were there any mechanical problems found?

Yes

Refer to Service information for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Go To3

3.POWER LIFTGATE MODULE - POSITION SENSE OPEN

Did the liftgate reverse back to the closed position?

Yes

Go To 4

Replace the Power Liftgate Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

4.(Q51) FULL OPEN SWITCH CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 5

Repair the (Q51) Full Open Switch circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

5.CHECK THE POWER LIFTGATE DRIVE UNIT

NOTE: DTC B1969 will set when the position sensor count is 890 or above in open direction. In a normally operating power liftgate system, the position sensor count for fully open is between 820 and 860. Fully closed normal count is 0.

Is the power liftgate drive unit position sensor count above 890 with the power liftgate in the full open position, or if the liftgate is closed, is the position count above or below 0 counts?

Yes

Replace the Liftgate Drive Unit in accordance with service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)

Replace the Power Liftgate Module in accordance with service information. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)