DTC B316B, B317A, B318A, or B319A (without AER)
Diagnostic Instructions
DTC Descriptors
DTC B316B 02: Driver Window Switch Short to
Ground |
DTC B317A 02: Passenger Window Switch Short to
Ground |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Driver Window Motor Up Control
|
B316B 02
|
1
|
1
|
-
|
Driver Window Motor Down Control
|
B316B 02
|
1
|
1
|
-
|
Driver Window Motor Express Control
|
B316B 02
|
1
|
1
|
-
|
Passenger Window Motor Up Control
|
B317A 02
|
2
|
2
|
-
|
Passenger Window Motor Down Control
|
B317A 02
|
2
|
2
|
-
|
Passenger Window Motor Express Control
|
B317A 02
|
2
|
2
|
-
|
1. Driver Window Malfunction
2. Passenger Window Malfunction
|
|
|
Circuit/System Description
The window motors are supplied with B+ voltage which is used to
power the motor and also used as a reference voltage within the
logic circuit. When the driver or passenger window switch is
pressed, a switch is closed causing the reference voltage in the
appropriate circuit in the window motor to drop, the window motor
responds by moving the window in the direction commanded.
Conditions for Running the DTC
Battery voltage must be between 9-16 V.
Conditions for Setting the DTC
B316B 02
The BCM has detected the driver left front window switch is active
for greater than 60 seconds.
B317A 02
The BCM has detected the passenger window switch or the driver
right front window switch is active for greater than 60 seconds.
Action Taken When the DTC Sets
The affected power window will malfunction.
Conditions for Clearing the DTC
• |
The DTC will be current as
long as the fault is present. |
• |
The DTC will change from
current to history when the fault is no longer present.
|
• |
A history DTC will clear after
100 consecutive ignition cycles if the condition for the
malfunction is no longer present. |
Reference Information
Schematic Reference
Moveable Window Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Windows Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. |
Ignition ON, command the
driver window UP, DOWN, express UP and express DOWN by using the
S79D window switch-driver. The driver window should perform the UP,
DOWN and express functions. |
⇒ |
If the driver window does not perform as
specified, refer to Driver Window Malfunction. |
2. |
Command the passenger window
UP, DOWN, express UP and express DOWN by using the S79P window
switch-passenger and the right front window switch on the S79D
window switch-driver. The passenger window should perform the UP,
DOWN and express functions from each switch. |
⇒ |
If the passenger window does not perform as
specified, refer to Passenger Window Malfunction. |
Circuit/System Testing
Driver Window Malfunction
1. |
Ignition OFF, disconnect the
harness connector at the S79D window switch-driver. |
2. |
Ignition ON, verify the scan
tool Driver Window Main Control Down Switch parameter is
Inactive. |
⇒ |
If not the specified value, test the signal
circuit terminal 3 for a short to ground. If the circuit tests
normal, replace the M74D window motor-driver. |
3. |
Verify the scan tool Driver
Window Main Control Up Switch parameter is Inactive. |
⇒ |
If not the specified value, test the signal
circuit terminal 5 for a short to ground. If the circuit tests
normal, replace the M74D window motor-driver. |
4. |
Verify the scan tool Driver
Window Main Control Express Switch parameter is Inactive.
|
⇒ |
If not the specified value, test the signal
circuit terminal 2 for a short to ground. If the circuit tests
normal, replace the M74D window motor-driver |
5. |
If all circuits test normal,
test or replace the S79D window switch-driver. |
Passenger Window Malfunction
1. |
Ignition OFF, disconnect the
harness connector at the S79P window switch-passenger. |
2. |
Disconnect the harness
connector at the S79D window switch-driver. |
3. |
Ignition ON, verify that the
scan tool Passenger Window Switch at Door parameter is
Inactive. |
⇒ |
If the value is Up, test the signal circuit
terminal 8 for a short to ground. If the circuit tests normal, test
or replace the M74P window motor-passenger. |
⇒ |
If the value is Down, test the signal circuit
terminal 7 for a short to ground. If the circuit tests normal, test
or replace the M74P window motor-passenger. |
⇒ |
If the value is Express, test the signal circuit
terminal 6 for a short to ground. If the circuit tests normal, test
or replace the M74P window motor-passenger. |
4. |
Ignition OFF, connect the
harness connector at the S79D window switch-driver. |
5. |
Ignition ON, observe the scan
tool Passenger Window Switch at Door parameter while using the
right front window switch on the S79D window switch-driver. The
parameters should change from Inactive to Up, Down and
Express. |
⇒ |
If the values do not change, test or replace the
S79D window switch-driver. |
6. |
If all circuits test normal,
replace the S79P window switch-passenger. |
Component Testing
Driver Window Switch
1. |
Ignition OFF, disconnect the
harness connector at the S79D window switch-driver. |
2. |
With the switch in the
INACTIVE position, test for infinite resistance between the
appropriate signal terminals listed below and the ground terminal
1: |
⇒ |
If less than the specified value, replace the S79D
window switch-driver. |
3. |
With the switch in the UP
position, test for less than 2 Ω between the signal terminal
listed below and the ground terminal 1: |
⇒ |
If greater than the specified range, replace the
S79D window switch-driver. |
4. |
With the switch in the DOWN
position, test for less than 2 ohms between the signal terminal
listed below and the ground terminal 1: |
⇒ |
If greater than the specified range, replace the
S79D window switch-driver. |
Passenger Window Switch
1. |
Ignition OFF, disconnect the
harness connector at the S79P window switch-passenger. |
2. |
Test for infinite resistance
between the signal terminals 6, 7 and 8 and the ground terminal 1
with the switch in the INACTIVE position. |
⇒ |
If less than the specified value, replace the S79P
window switch-passenger |
3. |
Test for less than 2 Ω
between the signal terminal 8 and the ground terminal 1 with the
switch in the UP position. |
⇒ |
If greater than the specified range, replace the
S79P window switch-passenger. |
4. |
Test for less than 2 Ω
between the signal terminal 7 and the ground terminal 1 with the
switch in the DOWN position. |
⇒ |
If greater than the specified range, replace the
S79P window switch-passenger. |
5. |
Test for less than 2 Ω
between the signal terminal 6 and the ground terminal 1 with the
switch in the EXPRESS DOWN position |
⇒ |
If greater than the specified range, replace the
S79P window switch-passenger. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|