Dodge ZB 2005 Service Manual page 1245

DRIVEABILITY - GAS
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.
GOOD TRIP EQUAL TO ZERO
(K40) IAC #1 DRIVER CIRCUIT SHORTED TO #2, #3, OR #4
(K60) IAC #2 DRIVER CIRCUIT SHORTED TO #3 OR #4
(K39) IAC #3 DRIVER CIRCUIT SHORTED TO (K59) IAC #4 DRIVER CIRCUIT
IAC DRIVER CIRCUIT SHORTED TO VOLTAGE
IAC DRIVER CIRCUIT SHORTED TO GROUND
IAC MOTOR OPERATION
IAC MOTOR
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
No
2 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connectors.
Note: The following steps are checking for a short between the IAC Driver
circuits.
Measure the resistance between the (K40) IAC #1 Driver circuit and #2, #3, #4 Driver
circuits.
Is the resistance below 100 ohms on any of the Drivers?
Yes → Repair the short between the IAC Driver circuits.
No
POSSIBLE CAUSES
ACTION
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 3
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APPLICABILITY
All
All