Acura RL. Manual - part 102

Fig. 317: F-CAN Malfunction (BUS-OFF) - Circuit Diagram 

General Description 

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules 
simultaneously by using two signal lines (CANH and CANL). 

When the powertrain control module (PCM) does not receive the signals via the CAN lines for a set time or 
more, the PCM detects a malfunction and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The PCM does not receive any signals for at least 1 second. 

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. 

Execution

Continuous

Sequence

None

Duration

1 second or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

Battery voltage

10.0 V

-

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

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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 U0104 (126): ADVANCED DIAGNOSTICS 

DTC U0104: F-CAN MALFUNCTION (ADAPTIVE CRUISE CONTROL (ACC) UNIT-PCM) 

Fig. 318: F-CAN Malfunction (Adaptive Cruise Control (ACC) Unit-PCM) - Circuit Diagram 

General Description 

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules 
simultaneously by using two signal lines (CANH and CANL). 

When the powertrain control module (PCM) does not receive the signals via the CAN lines for more than a 
set time, the PCM detects a malfunction and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Execution

Continuous

Sequence

None

Duration

1 second or more

DTC Type

One drive cycle, MIL OFF

OBD Status

N/A

Condition

Minimum

Maximum

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:09 PM

Page 406  © 2005 Mitchell Repair Information Company, LLC. 

Malfunction Threshold 

The PCM does not receive any signals from the gauge control module for at least 1 second. 

Diagnosis Details 

Conditions for illuminating the indicator 

When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The 
MIL does not come on. 

Conditions for clearing the DTC 

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

DTC U0107 (30): ADVANCED DIAGNOSTICS (L4 ENGINE A/T) 

DTC U0107: LOST COMMUNICATION WITH THROTTLE ACTUATOR CONTROL MODULE 

Battery voltage

10.0 V

-

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:09 PM

Page 407  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 319: Lost Communication With Throttle Actuator Control Module - Circuit Diagram 

General Description 

The powertrain control module (PCM) uses the serial signal line for two-way communication with the 
throttle actuator control module. 

The PCM transmits the accelerator pedal position signal, etc., to the throttle actuator module, and the throttle 
actuator control module transmits the actual throttle valve position signal, a malfunction signal, etc., to the 
PCM. 

When no serial signals from the throttle actuator control module are received or the serial signals are 

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:09 PM

Page 408  © 2005 Mitchell Repair Information Company, LLC.