NHTSA ID Number: 10190830
Manufacturer Communication Number: IK1900074
TSB/Document Date: 2021-04-26
Summary
HPV wiper troubleshooting.
IK1900074 - Pre-2007 HPV Wiper Troubleshooting
Page 1 of 3
Countries :
CANADA, UNITED STATES, SOUTH AFRICA Document ID: IK1900074
Availability :
ISIS, FleetISIS
Revision:
7
Major System:
ACCESSORIES
Created :
12/12/2007
Current Language : English
Last Modified: 1/15/2013
Other Languages: Portuguese ,
Author:
Viewed :
Rob Marvel
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Title: Pre-2007 HPV Wiper Troubleshooting
Applies To: All Pre-2007 HPV's
DESCRIPTION
Note: If the wiper failure occured after an ESC replacement, and it went from an ESC 1, to an ESC 2, then the removal of feature code
595289 and the enabling of feature code 595288 is required. No further diagnosis is required.
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. 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.
SYMPTOMS
Wipers on Low all the time
Wipers on High all the time
Wipers won't come on
SIGNALS TO WATCH
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
ESC Pin
SPN
FMI
Byte 8
Wipers_Output_from_fuse_circuit
4008-F
611
14
6
Byte
7
1
Description / Circuit
Identification
Action
Wiper Power Under Current
Check for open circuits to the wiper relays.
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IK1900074 - Pre-2007 HPV Wiper Troubleshooting
Page 2 of 3
Wipers_Output_from_fuse_circuit
4008-F
611
14
6
2
Wiper Power Over Current
Check for a short to ground in the circuits to the wiper relays.
Wipers_Output_from_fuse_circuit
4008-F
611
14
6
3
Wiper Power Less than Normal
Check for a short in the circuits to the wiper relays.
Wipers_Output_from_fuse_circuit
4008-F
611
14
6
4
Wiper Power Greater than Normal
Check for excessive resistance or loose terminals in the circuits to
the wiper relays.
Wipers_Output_from_fuse_circuit
4008-F
611
14
6
6
Wiper Power has Current Flow
when Commanded Off
Check for a short to power in the circuits to the wiper relays.
Wiper_High_Speed_Cmd
4004-20
2033
14
8
1
Wiper Power Relay Output
Overloaded
Check for short to power in the circuits between the power relay
socket and the ESC. Check relay coil resistance
Wiper_High_Speed_Cmd
4004-20
2033
14
8
2
Wiper Power Relay Ouput Open
Circuit
Check for an open in the circuits between the power relay socket
and the ESC. Check relay coil resistance
Wiper_High_Speed_Cmd
4004-20
2033
14
8
3
Wiper Power Relay Output
Shorted to Ground
Check for short to ground in the circuits between the power relay
socket and the ESC. Check relay coil resistance
Wiper_Low_Speed_Cmd
4004-29
2033
14
14
1
Wiper Hi/Low Speed Relay
Output Overloaded
Check for short to power in the circuits between the relay socket
and the ESC. Check relay coil resistance
Wiper_Low_Speed_Cmd
4004-29
2033
14
14
2
Wiper Hi/Low Speed Relay
Output Open Circuit
Check for an open in the circuits between the relay socket and the
ESC. Check relay coil resistance
Wiper_Low_Speed_Cmd
4004-29
2033
14
14
3
Wiper Low Speed Relay Output
Shorted to Ground
Check for short to ground in the circuits between the relay socket
and the ESC. Check relay coil resistance
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
1600-22
1600-23
1600-24
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 28.
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.
If a short to ground is found, check the Washer pump input circuit
5. Measure voltage on pins 22, 23, and 24 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
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IK1900074 - Pre-2007 HPV Wiper Troubleshooting
Page 3 of 3
CIRCUIT DIAGRAMS
Wiper Output Schematics
Wiper Input Schematics
For advanced interactive Circuit Diagrams, click here. This diagram is a good place to see how the system works.
Electrical System Troubleshooting Guide - Wipers
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Copyright © 2013 Navistar
, Inc.
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TSB/Document ID: IK1900074
Replacement Service Bulletin Number:
MFR Communication Date: 2013-01-15
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VISIBILITY
MFR Component System:
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