High Idle Speed After Warm-up
F2-41flowchartReferences A/C, E/L, and P/S pressure switch signals to ECM.
13 HIGH IDLE SPEED AFTER WARM-UP
Idle speed excessively high after warm-up.
NOTE
[TROUBLESHOOTING HINTS] Excessive intake air supplied to engine. (1) Throttle valve not fully closed. (2) Idle-air control malfunction: Air valve not closed; Idle air control valve stuck. Also: A/C, E/L signal sent to ECM; P/S pressure switch always ON.
High Idle Speed After Warm-up
1
STEP 1: Is throttle valve fully closed when accelerator is released?
No
Is throttle linkage correctly installed and does it operate freely? (page F2-96). If OK, go to next step. If not OK, clean, adjust, or replace linkage (page F2-96)
Is throttle linkage correctly installed and does it operate freely? (page F2-96). If OK, go to next step. If not OK, clean, adjust, or replace linkage (page F2-96)
Yes: Go to step 3
2
STEP 3: Does SST Monitor light show that switches operate correctly with ignition switch ON? (page F2-92)
No (Light does not turn ON or OFF)
Light does not turn ON or OFF with specified switch: Check for cause (Refer to specified check sequence) (page F2-93)
No (Light always ON)
Light always ON: Check wiring between ECM terminal 1D and Self-Diagnosis Checker
Yes: Go to next step
3
STEP 4: Are ECM terminal voltages OK (especially 2E)? (page F2-141)
No
4
Check for cause