Mitsubishi Outlander XL. Manual - part 371

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

｠

CAN line harness damage or connector damage.

｠

ECM failed.

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: USB Cable

｠

MB991910: Main Harness A

STEP 1. Using scan tool MB991958, diagnose CAN bus line.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

(3)

Diagnose CAN bus line.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the CAN bus line normal?

YES:

 Go to Step 2.

NO:

 Repair the CAN bus line. Refer to GROUP 54D, Can Bus

Diagnostics Table P.54D-189.

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

(1)

Turn the ignition switch to the "ON" position.

(2)

Read the DTC.

(3)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is DTC P1590 set?

YES:

 Replace the ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8.

NO:

 It can be assumed that this malfunction is

intermittent. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to Cope
with Intermittent Malfunctions P.00-15.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-679

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC P1603: Battery Backup Line Malfunction

M11310100258USA0000010000

ZK602860

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

104

BATTERY
BACKUP

BATTERY BACKUP CIRCUIT

2

7.5A

AA00

ENGINE
CONTROL
MODULE

WHITE

WHITE

RED-BLA

CK

RELAY BOX
(ENGINE
COMPARTMENT)

B-11

36

FUSIBLE LINK

ZK603592

ECM

B-11 (GR)

Connector: B-11

AA00

 

13Ab-680

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

TECHNICAL DESCRIPTION
The ECM checks the open circuit of battery backup
line.

NOTE: 

When the system detects an open circuit in

the battery backup line, it makes 1 failure
judgment of other diagnostic trouble codes (DTCs).

DESCRIPTIONS OF MONITOR METHODS

Battery backup line voltage is under specified value.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored in
memory for the item monitored below)

｠

Not applicable

Sensor (The sensor below is determined to be
normal)

｠

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

ZK603806AA00

Good

Malfunction

Start

End

No

No

Yes

Yes

Yes

No

Monitoring

conditions

Continuous

failure for 2secs

Circuit voltage

< 6V

Check Conditions

｠

Engine starting sequence was completed.

｠

Battery positive voltage is higher than 10 volts.

Judgement Criterion

｠

Battery backup line voltage has continued to be 6
volts or lower for 2 seconds.

OBD-II DRIVE CYCLE PATTERN

None.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )

｠

Connector damage.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-681

DIAGNOSTIC TROUBLE CODE PROCEDURES

｠

Harness damage.

｠

ECM failed.

 

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: USB Cable

｠

MB991910: Main Harness A

｠

MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

(3)

Read the DTC.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is DTC P1603 set?

YES:

 Go to Step 2.

NO:

 The inspection is complete.

STEP 2. Measure the backup power supply voltage at ECM
connector B-11 by using power plant ECU check harness
special tool MB992110.

ECM

ZK603234AA00

Body side harness 

MB992110

(1)

Disconnect  all  ECM  connectors.  Connect  the  power  plant
ECU  check  harness  special  tool  MB992110  between  the
separated connectors.

13Ab-682

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES