Preliminary work: Diagnosis - Diagnostic Trouble Code (DTC) Memory 11 PSE (3.1)

Preparation for Test: 1. Check fuse F4-3 and fuse F4-11. 2. Battery voltage 11 - 14 V. 3. Ignition: ON.

Test step/Test scope	Test condition	Nominal value	Possible cause/Remedy 1)
1.0 Extend backup assist masts	Engage reverse gear.	Both backup assist masts extend after approx. 0.5 seconds.	Backup assist masts do not extend and pump motor in PSE control module (A37, A37/1) does not run. 23 PSE 1.0, 23 1.0. Backup assist masts do not extend even though pump motor in PSE control module (A37, A37/1) runs. 32 PSE 3.0, 32 1.0.
2.0 Retract backup assist masts	After 2 second delay, select range other than reverse.	Both backup assist masts retract after approx. 10 seconds.	Backup assist masts do not retract and pump motor in PSE control module (A37, A37/1) does not run. 23 PSE 1.0, 23 1.0. Backup assist masts do not retract even though pump motor in PSE control module (A37, A37/1) runs. 32 PSE 4.0, 32 2.0.
3.0 Retract backup assist masts	Backup assist masts extended Ignition: OFF	Both backup assist masts retract immediately.	Backup assist masts do not retract and pump motor in PSE control module (A37, A37/1) does not run. 23 PSE 1.0, 23 1.0. Backup assist masts do not retract even though pump motor in PSE control module (A37, A37/1) runs. 32 PSE 4.0, 32 2.0.

1) Observe Preparation for Test, see 22.