Jeep Liberty KJ. Manual — part 306
WIPER MODE SWITCH CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the igntion on.
•
Set Condition:
BCM detects a voltage less than 0.25 volts on the Wiper Mode Switch Input for more than 5 seconds.
Possible Causes
MULTIFUNCTION SWITCH SHORTED
FRONT WIPER SWITCH MUX CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, clear all BCM DTC’s.
Turn the Wipers on.
With the scan tool, read DTCs.
Does the scan tool display: WIPER MODE SWITCH CIRCUIT LOW?
Yes
>> Go To 2
No
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring har-
ness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
2.
MULTIFUNCTION SWITCH SHORTED
Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Turn the ignition on.
With the DRBIII
T
, select Body, Body Control Module and read: Multifunction Switch voltage..
Does the scan tool display: Multifunction Switch voltage above 4.75 volts?
Yes
>> Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
FRONT WIPER SWITCH MUX CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect the Multifunction Switch harness connector.
Measure resistance between ground and the Front Wiper Switch MUX circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the Front Wiper Switch MUX Circuit for a short to ground condition.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
8R - 16
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
KJ
WIPER ON/OFF RELAY OUTPUT CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on.
•
Set Condition:
BCM detects a high level on the Wiper On/Off Relay output when it is attempting to turn the wipers on for
more than 5 seconds.
Possible Causes
MISSING RELAY
OPEN CIRCUIT BREAKER
WIPER ON/OFF RELAY
BODY CONTROL MODULE
FRONT WIPER PARK SWITCH SENSE CIRCUIT OPEN
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, clear all BCM DTC’s.
Turn the Front Wipers on.
With the scan tool, read the DTC information.
Does the scan tool read: WIPER ON/OFF RELAY CIRCUIT HIGH?
Yes
>> Go To 2
No
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring har-
ness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
2.
MISSING RELAY
Turn the ignition off.
Check the PDC to make certain the Wiper On/Off Relay is present.
Is the Wiper On/Off Relay present?
Yes
>> Go To 3
No
>> Replace the missing Wiper On/Off Relay.
Perform BODY VERIFICATION TEST - VER 1.
3.
OPEN CIRCUIT BREAKER
Turn the ignition off.
Check the Junction Block Circuit Breaker 3.
Is the Circuit Breaker open?
Yes
>> Replace the open Circuit Breaker.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 4
KJ
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
8R - 17
4.
WIPER ON/OFF RELAY
Turn the ignition off.
Install a known good relay in place of the Wiper On/Off Relay.
Turn the Wipers On.
Do the Wipers operate normally?
Yes
>> Replace the Wiper On/Off Relay.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 5
5.
BODY CONTROL MODULE
Turn the ignition off
Remove the Wiper On/Off Relay.
Measure the voltage of the Fused B+ circuit of the Wiper On/Off Relay.
Is the voltage above 10 volts?
Yes
>> Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Repair the Front Wiper Park Switch Sense circuit for an open condition.
Perform BODY VERIFICATION TEST - VER 1.
8R - 18
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
KJ
WIPER ON/OFF RELAY OUTPUT CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on.
•
Set Condition:
BCM detects a low (ground) signal on the Wiper On/Off Relay output even though it is not attempting to drive
the output for more than 5 seconds.
Possible Causes
WIPER ON/OFF RELAY SHORT TO GROUND
WIPER ON/OFF RELAY
BODY CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, clear all BCM DTC’s.
Turn the Wipers on.
With the scan tool, read the DTC information.
Does the scan tool read: WIPER ON/OFF RELAY OUTPUT CIRCUIT LOW?
Yes
>> Go To 2
No
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring har-
ness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
2.
WIPER ON/OFF RELAY SHORT TO GROUND
Turn the ignition off.
Disconnect the Wiper On/Off Relay.
Measure the resistance between ground and the Wiper On/Off Relay Control circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the Wiper On/Off Relay Control circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
WIPER ON/OFF RELAY
Turn the ignition off.
Disconnect the Wiper On/Off Relay harness connector.
Measure the voltage of the Wiper On/Off Relay harness connector coil side feed circuit to ground.
Is the voltage above 10.0 volts?
Yes
>> Replace the Wiper On/Off Relay.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
KJ
WIPERS/WASHERS ELECTRICAL DIAGNOSTICS
8R - 19
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст