Acura RL. Manual - part 56

Start the engine, shift to the P position, and wait for at least 10 seconds.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
PCM memory.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the
diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.

DTC P0842 (25): ADVANCED DIAGNOSTICS

DTC P0842: SHORT IN 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH CIRCUIT,
OR 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH STUCK ON

Fig. 177: 2nd Clutch Transmission Fluid Pressure Switch - Circuit Diagram

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

Friday, June 05, 2009 2:32:05 PM

Fig. 178: Gear Position VS Shift Status Graph

General Description

The 2nd clutch transmission fluid pressure switch is installed in the hydraulic pressure circuit to the 2nd
clutch. When hydraulic pressure is supplied to the 2nd clutch, the switch is turned ON. When hydraulic
pressure is not supplied to the 2nd clutch, the switch is turned OFF. The signal from the 2nd clutch
transmission fluid pressure switch is input to the powertrain control module (PCM). The PCM detects the
hydraulic pressure supply conditions at the gear change to 2nd gear (1st --> 2nd, 3rd --> 2nd) to reduce the
shock that occurs at the gear change.

If the 2nd clutch transmission fluid pressure switch is ON while driving the vehicle with the speed ratio of
the output shaft (countershaft) to the input shaft (mainshaft) other than the 2nd ratio, the PCM detects a 2nd
clutch transmission fluid pressure switch failure and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The input signal from the 2nd clutch transmission fluid pressure switch to the PCM is low when driving in
1st gear, 3rd gear, or 5th gear.

Driving Pattern

Start the engine, and drive the vehicle in the D position and 3rd gear for at least 2 seconds.



Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL

Execution

Continuous

Sequence

None

Duration

2 seconds or more

DTC Type

One drive cycle, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery
voltage

11.0 V

No active
DTCs

P0122, P0123, P0705, P0716, P0717, P0721, P0722, P0746, P0747, P0751, P0752,
P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777, P0796, P0797, P0843,
P0847, P0848, P0962, P0963, P0966, P0967, P0970, P0971, P0973, P0974, P0976,
P0977, P0979, P0980, P0982, P0983, P1743, P1744, P1745, P1780

Others

Not during shifting

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

Friday, June 05, 2009 2:32:05 PM

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
PCM memory.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the
diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.

DTC P0843 (25): ADVANCED DIAGNOSTICS

DTC P0843: OPEN IN 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH CIRCUIT,
OR 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH STUCK OFF

Fig. 179: 2nd Clutch Transmission Fluid Pressure Switch - Circuit Diagram

Fig. 180: Gear Position VS Shift Status Graph

General Description

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

Friday, June 05, 2009 2:32:05 PM

pressure is not supplied to the 2nd clutch, the switch is turned OFF. The signal from the 2nd clutch
transmission fluid pressure switch is input to the powertrain control module (PCM). The PCM detects the
hydraulic pressure supply conditions at the gear change to 2nd gear (1st --> 2nd, 3rd --> 2nd) to reduce the
shock that occurs at the gear change. If the 2nd clutch transmission fluid pressure switch is OFF while the
rotation speed ratio of the input/output pulses is that of 2nd gear, the PCM detects a malfunction in the 2nd
clutch transmission fluid pressure switch and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The input signal from the 2nd clutch transmission fluid pressure switch to the PCM is high when driving in
2nd gear.

Driving Pattern

Start the engine, and drive the vehicle in the D position and 2nd gear for at least 2 seconds.



Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
PCM memory.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the
diagnostic runs.

Execution

Continuous

Sequence

None

Duration

2 seconds or more

DTC Type

One drive cycle, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery
voltage

11.0 V

No active
DTCs

P0122, P0123, P0705, P0716, P0717, P0721, P0722, P0746, P0747, P0751, P0752,
P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777, P0796, P0797, P0842,
P0847, P0848, P0962, P0963, P0966, P0967, P0970, P0971, P0973, P0974, P0976,
P0977, P0979, P0980, P0982, P0983, P1743, P1744, P1745, P1780

Others

Not during shifting

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

Friday, June 05, 2009 2:32:05 PM

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