Jeep XJ. Manual — part 844
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Vehicle Speed Sensor Ground circuit.
Is the resistance above 5.0 ohms?
All
Yes
→
Repair the Vehicle Speed Sensor Ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
4
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Vehicle Speed Signal circuit between the PCM
connector and the VSS connector.
Is the resistance above 5.0 ohms?
All
Yes
→
Repair the Vehicle Speed Signal circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
5
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Vehicle Speed Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Vehicle Speed Signal circuit for a short to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
6
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Vehicle Speed Signal circuit in the Vehicle Speed Sensor
harness connector.
Is the voltage above 6.0 volts?
All
Yes
→
Repair the Vehicle Speed Signal circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Test Complete.
137
DRIVEABILITY - GAS
P0500-NO VEHICLE SPEED SENSOR SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
7
At this time, the conditions required to set the DTC are not present.
Note: Use the Freeze Frame Data to help duplicate the conditions that set
the DTC. Pay particular attention to the DTC set conditions, such as, VSS,
MAP, ECT, and Load.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any technical service bulletins that may apply.
Perform a wiggle test of the wiring harnesses and connectors while the engine is
running with the vehicle in gear on a hoist. Watch for the Good Trip Counter to
change to zero.
Were any problems found?
All
Yes
→
Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Test Complete.
138
DRIVEABILITY - GAS
P0500-NO VEHICLE SPEED SENSOR SIGNAL —
Continued
Symptom:
P0505-IDLE AIR CONTROL MOTOR CIRCUITS
When Monitored and Set Condition:
P0505-IDLE AIR CONTROL MOTOR CIRCUITS
When Monitored:
At power-up and battery voltage greater than 11.5 volts.
Set Condition:
The PCM senses a short to ground or battery voltage on any of the four
Idle Air Control (IAC) driver circuits for 100 msec while the IAC motor is active.
POSSIBLE CAUSES
IAC MOTOR WIRING HARNESS OBSERVABLE
IAC MOTOR WIRING HARNESS INTERMITTENT
IAC #1 DRIVER CIRCUIT SHORTED TO #2, #3, OR #4
IAC #2 DRIVER CIRCUIT SHORTED TO #3 OR #4
IAC #3 DRIVER CIRCUIT SHORTED TO #4
IAC MOTOR
IAC #1 DRIVER CIRCUIT SHORTED TO GROUND
IAC #2 DRIVER CIRCUIT SHORTED TO GROUND
IAC #3 DRIVER CIRCUIT SHORTED TO GROUND
IAC #4 DRIVER CIRCUIT SHORTED TO GROUND
IAC #1 DRIVER CIRCUIT OPEN
IAC #2 DRIVER CIRCUIT OPEN
IAC #3 DRIVER CIRCUIT OPEN
IAC #4 DRIVER CIRCUIT OPEN
POWERTRAIN CONTROL MODULE (IAC #1 DRIVER)
POWERTRAIN CONTROL MODULE (IAC #2 DRIVER)
POWERTRAIN CONTROL MODULE (IAC #3 DRIVER)
POWERTRAIN CONTROL MODULE (IAC #4 DRIVER)
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read the DTC’s.
Is the Good Trip Counter displayed and equal to zero for P0505?
All
Yes
→
No
→
139
DRIVEABILITY - GAS
TEST
ACTION
APPLICABILITY
2
Start the engine and let idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #1 Driver Circuit.
Was the voltage over 5.0 volts at any time?
All
Yes
→
No
→
3
Start the engine. Allow the engine to idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #2 Driver Circuit.
Was the voltage over 5.0 volts at any time?
All
Yes
→
No
→
4
Start the engine. Allow the engine to idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #3 Driver Circuit.
Was the voltage over 5.0 volts at any time?
All
Yes
→
No
→
5
Start the engine. Allow the engine to idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #4 Driver Circuit.
Was the voltage over 5.0 volts at any time?
All
Yes
→
No
→
6
Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connector(s).
Note: Check connectors - Clean/repair as necessary.
Note: The following steps are checking for a short between the IAC Driver
Circuits.
Measure the resistance between the IAC #1 Driver circuit and #2, #3, #4 Driver
circuits.
Is the resistance below 5.0 ohms on any of the Drivers?
All
Yes
→
Repair the IAC Driver Circuits shorted together.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
140
DRIVEABILITY - GAS
P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
Continued
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст