NHTSA ID Number: 10190831
Manufacturer Communication Number: IK1900088
TSB/Document Date: 2021-04-26
Summary
Wiper Troubleshooting.
IK1900088 - Wiper Troubleshooting on 2007 HPV and ProStar
Page 1 of 2
Countries :
CANADA, UNITED STATES, MEXICO Document ID: IK1900088
Availability :
ISIS, FleetISIS
Revision:
6
Major System:
ACCESSORIES
Created :
3/4/2008
Current Language : English
Last Modified: 1/3/2013
Other Languages: Français, Español,
Author:
Viewed :
Rob Marvel
6608
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Title: Wiper Troubleshooting on 2007 HPV and ProStar
Applies To: 2007 and later HPV
DESCRIPTION
The windshield wiper switch has a total of eight positions: off, five intermittent wipe settings, low speed, and high speed. The wiper switch is actually three separate
switches. Each of the three switches is connected to an accessory biased ESC digital input. Closing a switch provides a path to ZVR, which pulls the digital input to near
0V. All three switches are normally closed, so when the wipers are at rest, the voltage on the wires from the multifunction switch to the body controller should be near 0V.
Each of the eight possible wiper switch settings causes a different combination of open and closed switches. The combination of open or closed switches is used by the
ESC to determine which switch position the driver has selected. Note that if the wiper switch is disconnected, the inputs will all pull up to accessory voltage level. This will
cause the ESC to operate the wiper motor at high speed. Other wiper inputs include ESC ignition and ESC accessory inputs.
The most common cause of the wipers staying on all the time is that the washer input to the ESC is staying on.
For more information on how this feature works, click here S08293 this manual is for the old ESC, but they both work the same way.
SYMPTOMS
Wipers on High all the time
Wipers won't come on
Wipers on low all the time
SIGNALS TO WATCH
Wiper Signal DLB Session
TROUBLESHOOTING
1. The first step is to check and record the DTC's using DLB, not the cluster. For info on doing this properly, see IK2600036.
Signal
B/C
Pin
SPN
FMI
Description
Action
Wiper_Cmd
1604A
4057
5
Wiper Motor
Circuit
Under
Current
Open circuit from the body controller 1604-A to pin 86 of the wiper ON/OFF and High/Low relays.
Wiper_Cmd
1604A
4057
6
Wiper Motor
Circuit Over
Current
Shorted circuit from the body controller 1604-A to pin 86 of the wiper ON/OFF and High/Low relays.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 2/1/2013
IK1900088 - Wiper Troubleshooting on 2007 HPV and ProStar
Page 2 of 2
Wiper_Low_Speed_Cmd
1601E6
2637
5
Wiper
High/Low
Relay Under
Current
Open circuit from the body controller 1601-E6 to pin 85 of the wiper high/low relay.
Wiper_Low_Speed_Cmd
1601E6
2637
6
Wiper
High/Low
Relay Over
Current
Shorted circuit from the body controller 1601-E6 to pin 85 of the wiper high/low relay.
Wiper_High_Speed_Cmd
1601E7
2636
5
Wiper
On/Off Relay
Under
Current
Open circuit from the body controller 1601-E7 to pin 85 of the wiper power relay.
Wiper_High_Speed_Cmd
1601E7
2636
6
Wiper
On/Off Relay
Over Current
Shorted circuit from the body controller 1601-E7 to pin 85 of the wiper power relay.
2. Make sure that you have ignition and accessory voltage to the Body Controller. If you don't have accessory voltage, the wipers won't work. For info on checking this,
see IK0800092.
3. Hook up with DLB and monitor the Washer_Pump_Signal, Wiper_0_Signal, Wiper_1_Signal, and Wiper_2_Signal. These are the inputs to the ESC from the switch.
If there is a check mark next to the Washer_Pump_Signal, the ESC thinks that the washer switch is being pushed all the time.
Wiper Switch Position
1600-A9
1600-A10
1600-A11
Off
No Checkmark
No Checkmark
No Checkmark
Intermittent 1
Checkmark
No Checkmark
No Checkmark
Intermittent 2
No Checkmark
Checkmark
No Checkmark
Intermittent 3
Checkmark
Checkmark
No Checkmark
Intermittent 4
No Checkmark
No Checkmark
Checkmark
Intermittent 5
Checkmark
No Checkmark
Checkmark
Low
No Checkmark
Checkmark
Checkmark
High
Checkmark
Checkmark
Checkmark
4. Hook up your break out box to the 1600 connector and measure voltage on pin A15.
You should have about 10 volts when the washer switch is not being pushed.
You might have 0v or close to it. This means that you have a short to ground or a bad switch.
5. Measure voltage on pins A9, A10, and A11 of the 1600 connector through the breakout box.
These pins are the inputs for the Wiper_0_Signal, Wiper_1_Signal, and Wiper_2_Signal.
You should have about 0 volts on each of these with the wiper switch turned off. Each of the three switches in the multifunction switch are normally closed.
When the switch is moved to another position, the switch will open and the corresponding wire will show the voltage output from the body controller.
If you have voltage on any of these with the switch turned off, you have an open in that circuit.
CIRCUIT DIAGRAMS
Wiper Output Circuit Diagram
Wiper Input Circuit Diagram
For advanced interactive Circuit Diagrams, click here. This diagram is a good place to see how the system works.
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Copyright © 2013 Navistar
, Inc.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 2/1/2013
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TSB/Document ID: IK1900088
Replacement Service Bulletin Number:
MFR Communication Date: 2013-01-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VISIBILITY/WIPER
MFR Component System:
MFR Component Subsystem:
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