P1846
DTC P1846 ATF PRESSURE SWITCH 6Description
Fail-safe function to detect high & low reverse clutch solenoid valve condition.
CONSULT-II Reference Value
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "ATF PRES SW 6/CIRC" with CONSULT-II is detected when TCM detects that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6 is irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
- ATF pressure switch 6
- Harness or connectors (The switch circuit is open or shorted.)
DTC Confirmation Procedure
CAUTION: Always drive vehicle at a safe speed.
NOTE: If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: "D" position
Gear position: 2nd -> 3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
3. Perform step "2" again.
4. Turn ignition switch "OFF", then perform step "1" to "3" again.
5. Check "SELF-DIAG RESULTS" mode for "A/T" with CONSULT II.
Diagnostic Procedure
1. INPUT SIGNALS (WITH CONSULT-II)
With CONSULT-II
1. Start the engine.
2. Select "ECU INPUT SIGNALS" or "MAIN SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Drive vehicle in the "D" position (2nd => 3rd gear), and confirm the ON/OFF actuation of the "ATF PRES SW 6".
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM
Perform TCM input/output signal inspection.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:
- Power supply and ground circuit for TCM.
- A/T assembly harness connector pin terminals for damage or loose connection with harness connector
OK or NG
OK >> Replace the transmission assembly.
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform DTC Confirmation Procedure.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.