B18BB–WINDOW CONTROL CIRCUIT LOW – TIPM | JEEP Compass 1G 2007 DIY Repair Guide

B18BB–WINDOW CONTROL CIRCUIT LOW – TIPM

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Whenever the module is awake.
Set Condition:
When the Totally Integrated Power Module (TIPM) senses a draw of between 65 and 100 amps for 80 ms., this code will set.
NOTE: The most probable cause for this DTC to set is that the driver held all four window switches down for an extended period of time thereby causing the high side driver, in the TIPM, to overheat and cut out. Once the high side driver is opened, it will remain open until the next key cycle. However, the code will remain as stored.

Possible Causes

(F981) IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND

ALL FOUR WINDOW SWITCHES HELD DOWN FOR AN EXTENDED PERIOD OF TIME

DRIVER POWER WINDOW SWITCH

TOTALLY INTEGRATED POWER MODULE (TIPM)

1.TEST FOR INTERMITTENT CONDITION

Does the scan tool display B18BB–WINDOW CONTROL CIRCUIT LOW?

Yes

2.TEST WINDOW MOTORS

Do all window motors operate properly at this time?

No

Yes

The conditions that caused this code to set are not present at this time. Check for a sticking switch and using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

3.(F981) IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND

Is the resistance below 10,000.0 ohms?

No

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

Yes

4.DRIVER POWER WINDOW SWITCH

Is the resistance below 10,000.0 ohms?

Yes

Repair the (F981) Ignition Switch Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Driver Power Window Switch
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

5.WINDOW MOTOR

NOTE: The graphic shows the Left Front Window Motor (LHD), all others are similar,

Does the test light illuminate brightly when the switch in held in both directions?

No

Yes

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

6.WINDOW DRIVER (UP) CIRCUIT SHORT TO GROUND

Is the resistance below 10.0 ohms?

Yes

Repair the Window Driver (Up) circuit for a short to ground. If this is not the driver window, the short could be from the master switch to the motor. Using the Power Window Schematic check for the proper circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

7.WINDOW DRIVER (DOWN) CIRCUIT SHORT TO GROUND

Is the resistance below 10.0 ohms?

Yes

Repair the Window Driver (Down) circuit for a short to ground. If this is not the driver window, the short could be from the master switch to the motor. Check the Power Window Schematic for the proper circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)