No.1 SYSTEM DOES NOT ACTIVATE [MULTI INFORMATION DISPLAY]

id0903h2002100

1

System does not activate

DESCRIPTION
•  The multi information display screen does not appear when the ignition is switched to ON or ACC.
•  No communication with M-MDS.
POSSIBLE CAUSES
•  Multi information display power supply related malfunction
―  Open circuit in wiring harness between relay block (ACC relay) terminal 2B and multi information display terminal 1C*1
―  Open circuit in wiring harness between ignition switch terminal F and multi information display terminal 1C*2
―  Open circuit in wiring harness between relay block (IG1 relay) terminal 1B and multi information display terminal 1E*1
―  Open circuit in wiring harness between ignition switch terminal A and multi information display terminal 1E*2
―  Short to ground in wiring harness between relay block (ACC relay) terminal 2B and multi information display terminal 1C*1
―  Short to ground in wiring harness between ignition switch terminal F and multi information display terminal 1C*2
―  Short to ground in wiring harness between relay block (IG1 relay) terminal 1B and multi information display terminal 1E*1
―  Short to ground in wiring harness between ignition switch terminal A and multi information display terminal 1E*2
―  Open circuit in wiring harness between ROOM 15A fuse and multi information display terminal 1A
―  Short to ground in wiring harness between ROOM 15A fuse and multi information display terminal 1A
•  Ground related malfunction in multi information display
―  Open circuit between multi information display terminal 1W and body ground
―  Ground point lifting, looseness
•  Multi information display malfunction

*1  :With advanced keyless entry and push button start system
*2  :Without advanced keyless entry and push button start system

Diagnostic procedure

STEP

INSPECTION

RESULT

ACTION
1
VERIFY IF MALFUNCTION CAUSE IS POOR CONNECTION IN MULTI INFORMATION DISPLAY CONNECTOR
•  Inspect the connection of the multi information display connectors.
•  Are the multi information display connectors connected securely?
Yes
Go to the next step.
No
Securely connect the multi information display.
2
VERIFY IF MALFUNCTION CAUSE IS DAMAGE AND/OR PULLED-OUT MULTI INFORMATION DISPLAY CONNECTOR TERMINAL
•  Disconnect the multi information display connectors.
•  Are all the pins normal?
Yes
Go to the next step.
No
If the multi information display connector is incorrect:
•  Replace the multi information display.
(See MULTI INFORMATION DISPLAY REMOVAL/INSTALLATION.)
If the wiring harness-side connector is incorrect:
•  Repair or replace the pins and/or the connector.
3
VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN MULTI INFORMATION DISPLAY GROUND CIRCUIT
•  Switch the ignition to off.
•  Disconnect the multi information display connector.
•  Verify if there is continuity between the multi information display vehicle side connector terminal 1W and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair the open circuit in the wiring harness.
Verify the connection condition of the ground point, and repair.
4
INSPECT MULTI INFORMATION DISPLAY POWER SUPPLY (B+) SYSTEM
•  Leave the multi information display connector disconnected.
•  Measure the voltage between multi information display wiring harness side connector terminal 1A and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ROOM 15A fuse.
If the fuse is damaged:
•  Replace the ROOM 15A fuse.
If the fuse is burned out:
•  Inspect and repair the wiring harness between the ROOM 15A fuse and multi information display terminal 1A for a short circuit to the ground system.
If the fuse is not damaged or burned out:
•  Inspect and repair the wiring harness for an open circuit between battery positive terminal and multi information display terminal 1A.
5
INSPECT MULTI INFORMATION DISPLAY POWER SUPPLY (ACC) SYSTEM
•  Leave the multi information display connector disconnected.
•  Switch the ignition to ACC.
•  Measure the voltage between multi information display wiring harness side connector terminal 1C and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the AUDIO 7.5A fuse.
If the fuse is damaged:
•  Replace the AUDIO 7.5A fuse.
If the fuse is burned out:
•  Inspect and repair the wiring harness between the AUDIO 7.5A fuse and multi information display terminal 1C for a short circuit to the ground system.
If the fuse is not damaged or burned out:
•  Inspect and repair the following wiring harness for an open circuit:
―  Between relay block (ACC relay) terminal 2B and multi information display terminal 1C*1
―  Between ignition switch terminal F and multi information display terminal 1C*2
6
INSPECT MULTI INFORMATION DISPLAY POWER SUPPLY (IG1) SYSTEM
•  Leave the multi information display connector disconnected.
•  Switch the ignition to on.
•  Measure the voltage between multi information display wiring harness side connector terminal 1E and body ground.
•  Is the voltage B+?
Yes
Replace the multi information display. (Multi information display internal malfunction)
(See MULTI INFORMATION DISPLAY REMOVAL/INSTALLATION.)
No
Inspect the METER 15A fuse.
If the fuse is damaged:
•  Replace the METER 15A fuse.
If the fuse is burned out:
•  Inspect and repair the wiring harness between the METER 15A fuse and multi information display terminal 1E for a short circuit to the ground system.
If the fuse is not damaged or burned out:
•  Inspect and repair the following wiring harness for an open circuit:
―  Between relay block (IG1 relay) terminal 1B and multi information display terminal 1E*1
―  Between ignition switch terminal A and multi information display terminal 1E*2