Acura RL. Instruction — page 57

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 P0847 (26): ADVANCED DIAGNOSTICS

DTC P0847: SHORT IN 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH CIRCUIT,
OR 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH STUCK ON

Fig. 181: 3rd Clutch Transmission Fluid Pressure Switch — Circuit Diagram

Fig. 182: Gear Position VS Shift Status Graph

General Description

The 3rd clutch transmission fluid pressure switch is installed in the hydraulic pressure circuit to the 3rd
clutch. When hydraulic pressure is supplied to the 3rd clutch, the switch is turned ON. When hydraulic
pressure is not supplied to the 3rd clutch, the switch is turned OFF. The signal from the 3rd 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 3rd gear (2nd —> 3rd, 4th —> 3rd) to reduce the
shock that occurs at the gear change.

If the 3rd clutch transmission fluid pressure switch is ON while driving, and the speed ratio of the output
shaft (countershaft) to the input shaft (mainshaft) is other than the 3rd ratio, the PCM detects a 3rd clutch
transmission fluid pressure switch failure, and a DTC is stored.

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 225 © 2005 Mitchell Repair Information Company, LLC.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The input signal from the 3rd clutch transmission fluid pressure switch to the PCM is low when driving in
1st gear, 2nd gear, 4th gear, or 5th gear.

Driving Pattern

Start the engine, and drive the vehicle in the D position and 4th 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.

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 P0848 (26): ADVANCED DIAGNOSTICS

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

P0116, P0117, P0118, P0122, P0123, P0705, P0716, P0717, P0721, P0722, P0746,
P0747, P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777,
P0796, P0797, P0842, P0843, P0848, P0962, P0963, P0966, P0967, P0970, P0971,
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1743, P1744, P1745,
P1780

Other

Not during shifting

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 226 © 2005 Mitchell Repair Information Company, LLC.

DTC P0848: OPEN IN 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH CIRCUIT,
OR 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH STUCK OFF

Fig. 183: 3rd Clutch Transmission Fluid Pressure Switch Circuit Diagram

Fig. 184: Gear Position VS Shift Status Graph

General Description

The 3rd clutch transmission fluid pressure switch is installed in the hydraulic pressure circuit to the 3rd
clutch. When hydraulic pressure is supplied to the 3rd clutch, the switch is turned ON. When hydraulic
pressure is not supplied to the 3rd clutch, the switch is turned OFF. The signal from the 3rd 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 3rd gear (2nd —> 3rd, 4th —> 3rd) to reduce the
shock that occurs at the gear change. If the 3rd clutch transmission fluid pressure switch is OFF while the
rotation speed ratio of the input/output pulses is that of 3rd gear, the PCM detects a malfunction in the 3rd
clutch transmission fluid pressure switch and stores a DTC.

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

MONITOR DESCRIPTION CHART

Execution

Continuous

Sequence

None

Duration

2 seconds or more

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 227 © 2005 Mitchell Repair Information Company, LLC.

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The input signal from the 3rd clutch transmission fluid pressure switch to the PCM is high when driving in
3rd 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

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 P0872 (27): ADVANCED DIAGNOSTICS

DTC P0872: SHORT IN 4TH CLUTCH TRANSMISSION FLUID PRESSURE SWITCH CIRCUIT,
OR 4TH CLUTCH TRANSMISSION FLUID PRESSURE SWITCH STUCK ON

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

P0116, P0117, P0118, P0122, P0123, P0705, P0716, P0717, P0721, P0722, P0746,
P0747, P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777,
P0796, P0797, P0842, P0843, P0847, P0962, P0963, P0966, P0967, P0970, P0971,
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1743, P1744, P1745,
P1780

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 228 © 2005 Mitchell Repair Information Company, LLC.

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