A/C Does Not Cut-Off Under Wide Open Throttle Conditions
DETECTION CONDITION AND POSSIBLE CAUSE
| 21 |
A/C DOES NOT CUT-OFF UNDER WIDE OPEN THROTTLE CONDITIONS |
| DESCRIPTION |
- A/C compressor clutch does not disengage under wide open throttle
|
A/C DOES NOT CUT-OFF UNDER WIDE OPEN THROTTLE CONDITIONS INSPECTION
| STEP |
INSPECTION |
ACTION |
| 1 |
CHECK THE A/C MODE SWITCH
- Does the A/C turn off when the A/C mode switch is turned OFF?
|
Yes |
Go to step 2. |
| No |
See
A/C ALWAYS ON AND A/C COMPRESSOR RUNS CONTINUOUSLY . |
| 2 |
CHECK IF A/C CUTS OFF DURING WOT
- Start engine.
- A/C On.
- Perform a brief Wide Open Throttle (WOT) and return to idle. Listen for the A/C clutch to disengage during WOT, then re-engage a few seconds after returning to idle (a "click" sound will be heard when the clutch re-engages).
NOTE:
If the clicking sound cannot be heard, disconnect A/C clutch field coil connector G-166. With a test lamp connected between the power pin (GY/W) and ground pin (B) of A/C clutch field coil connector G-166, observe the test lamp while performing the brief WOT. The test lamp must go off during the brief WOT, then come back on a few seconds after returning to idle.
- Repeat test, if necessary, to verify results.
- After testing, reconnect C clutch field coil connector G-166 (if necessary).
- Does the A/C clutch or test lamp operate as indicated?
|
Yes |
The circuit is operating properly. At this time, the A/C will cut-off during WOT. |
| No |
Go to step 3. |
| 3 |
PERFORM PCM QUICK TEST
- Are any DTCs displayed during Continuous Memory, Key ON, Engine OFF (KOEO) or Key ON, Engine Running (KOER) or Self Tests?
|
Yes |
Check for cause See
DIAGNOSTIC TROUBLE CODE NUMBERS
.
|
| No |
See
A/C CLUTCH RELAY (ACCR) MALFUNCTION
step 6. Go to step 4.
|
| 4 |
- Verify test results. If OK,
See
DIAGNOSTIC INDEX
to service any additional symptoms.
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