Acura RL. Instruction — page 34

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 P0602 (196): ADVANCED DIAGNOSTICS

DTC P0602: POWERTRAIN CONTROL MODULE (PCM) PROGRAMMING ERROR

Fig. 96: Powertrain Control Module Program

General Description

The powertrain control module (PCM) is equipped with an update program to update its control program.
The programs in the CPU of the PCM are classified as a PCM program (update-capable program) and a
program for the update function (nonupdateable program). The program update only updates the powertrain
control program.

When the PCM power is turned off during an update, the power for the update function is lost, and the
update process stops. When the program update is stopped before it is completed, the PCM stores a DTC
that indicates the update is not finished.

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

Ignition switch

ON

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Malfunction Threshold

The powertrain control program update is stopped before it is finished, and this condition continues 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.

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 P0603 (131): ADVANCED DIAGNOSTICS

DTC P0603: POWERTRAIN CONTROL MODULE (PCM) INTERNAL CONTROL MODULE
KEEP ALIVE MEMORY (KAM) ERROR

Fig. 97: Powertrain Control Module — Communication Diagram

General Description

The powertrain control module (PCM) is equipped with a keep-alive memory. The data (control learn data
etc) for powertrain control and information (vehicle identification number (VIN), etc) related to vehicle
control is stored in the keep alive memory, so that it can be maintained even when power is not supplied to
the PCM such as when the battery is disconnected. When power is restored to the PCM, the CPU retrieves
the stored information from the keep-alive memory, but when the data retrieval process is not finished
normally, a malfunction is detected and a DTC is stored.

The CPU writes data to the keep-alive memory from the CPU: Control related data is written when the
ignition is turned on, and vehicle information when commanded from the HDS.

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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If the data writing process is not completed normally, a malfunction is detected and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

A malfunction is detected whenever the keep alive data retrieval and writing process is not completed
normally.

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 P0627 (169): ADVANCED DIAGNOSTICS

DTC P0627: FUEL PUMP CONTROL MODULE SYSTEM MALFUNCTION

Execution

Continuous

Sequence

None

Duration

1 second or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

Ignition switch

ON

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 135 © 2005 Mitchell Repair Information Company, LLC.

Fig. 98: Fuel Pump Control Module System — Circuit Diagram

General Description

The fuel pump control module system monitors the voltage applied to the fuel pump in response to the duty
signal from the powertrain control module (PCM). When the voltage applied to the fuel pump is normal, the
fuel pump control module system outputs a high diagnosis signal, and when the voltage applied is abnormal,
it outputs a low signal. The PCM monitors this diagnosis signal whenever the engine is running.

When the diagnosis signal from the fuel pump control module system is low 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

Execution

Continuous

Sequence

None

Duration

2 seconds or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 136 © 2005 Mitchell Repair Information Company, LLC.

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