Dodge ZB 2005 Service Manual page 1263

DRIVEABILITY - GAS
Symptom:
P1294-TARGET IDLE NOT REACHED
When Monitored and Set Condition:
P1294-TARGET IDLE NOT REACHED
When Monitored: With the engine idling and in drive, if automatic. There must not be a
MAP sensor trouble code or a throttle position sensor trouble code.
Set Condition: Engine idle is not within 200 rpm above or 100 rpm below target idle for
14 seconds. Three separate failures are required to set a bad trip. Two bad trips are
required to set the code.
GOOD TRIP EQUAL TO ZERO
VACUUM LEAK
AIR INDUCTION SYSTEM
THROTTLE BODY AND THROTTLE LINKAGE
IAC DRIVER CIRCUIT OPEN
PCM
TEST
1 Ignition on, engine not running.
NOTE: All MAP Sensor, IAC, and/or TPS codes present must be diagnosed
first before proceeding.
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 Inspect the Intake Manifold for vacuum leaks.
Inspect the Power Brake Booster for any vacuum leaks.
Inspect the PCV system for proper operation or any vacuum leaks.
Were any problems found?
Yes → Repair vacuum leak as necessary.
No
POSSIBLE CAUSES
ACTION
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
→ Go To 3
142
APPLICABILITY
All
All