DTC U3003:16 [INSTRUMENT CLUSTER]

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DTC U3003:16

Battery positive voltage is low

Detection Condition

•  Instrument cluster power supply voltage less than 10 V.

Possible Causes

•  Battery malfunction

•  Generator malfunction

•  BCM connector or terminals malfunction

•  Open circuit or short to ground in instrument cluster power supply circuit

―  Short to ground in wiring harness between BCM terminal 1O and battery positive terminal

―  ROOM 15 A fuse malfunction

―  MAIN 200 A fuse malfunction

―  Open circuit in wiring harness between BCM terminal 1O and battery positive terminal

•  BCM malfunction

•  Instrument cluster connector or terminals malfunction

•  Open circuit or short to ground in instrument cluster power supply circuit

―  Short to ground in wiring harness between the following:

•  BCM terminal 3P―Instrument cluster terminal 2U

•  Battery positive terminal―Instrument cluster terminal 2S

―  METER 10 A fuse malfunction

―  IG KEY 1 40 A fuse malfunction

―  MAIN 200 A fuse malfunction

―  Open circuit in wiring harness between the following:

•  BCM terminal 3P―Instrument cluster terminal 2U

•  Battery positive terminal―Instrument cluster terminal 2S

•  Instrument cluster malfunction

DTC U3003:16	Battery positive voltage is low
Detection Condition	• Instrument cluster power supply voltage less than 10 V.
Possible Causes	• Battery malfunction • Generator malfunction • BCM connector or terminals malfunction • Open circuit or short to ground in instrument cluster power supply circuit ― Short to ground in wiring harness between BCM terminal 1O and battery positive terminal ― ROOM 15 A fuse malfunction ― MAIN 200 A fuse malfunction ― Open circuit in wiring harness between BCM terminal 1O and battery positive terminal • BCM malfunction • Instrument cluster connector or terminals malfunction • Open circuit or short to ground in instrument cluster power supply circuit ― Short to ground in wiring harness between the following: • BCM terminal 3P―Instrument cluster terminal 2U • Battery positive terminal―Instrument cluster terminal 2S ― METER 10 A fuse malfunction ― IG KEY 1 40 A fuse malfunction ― MAIN 200 A fuse malfunction ― Open circuit in wiring harness between the following: • BCM terminal 3P―Instrument cluster terminal 2U • Battery positive terminal―Instrument cluster terminal 2S • Instrument cluster malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM PCM DTC INSPECTION

•  Perform the PCM DTC inspection using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 1.3, MZR 1.5].)

(See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZR 1.3, MZR 1.5].)

(See DTC TABLE [MZ-CD 1.6].)

No

Go to the next step.

2

INSPECT BATTERY

•  Inspect the battery.
(See BATTERY INSPECTION [MZR 1.3, MZR 1.5].)

(See BATTERY INSPECTION [MZ-CD 1.6].)

•  Is there any malfunction?

Yes

Recharge or replace the battery, then go to Step 9.

(See BATTERY RECHARGING [MZR 1.3, MZR 1.5].)

(See BATTERY RECHARGING [MZ-CD 1.6].)

(See BATTERY REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].)

(See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].)

No

Go to the next step.

3

INSPECT GENERATOR

•  Inspect the generator.
(See GENERATOR INSPECTION [MZR 1.3, MZR 1.5].)

(See GENERATOR INSPECTION [MZ-CD 1.6].)

•  Is there any malfunction?

Yes

Replace the generator, then go to Step 9.

(See GENERATOR REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].)

(See GENERATOR REMOVAL/INSTALLATION [MZ-CD 1.6].)

No

Go to the next step.

4

INSPECT BCM CONNECTOR AND TERMINALS

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is there any malfunction?

Yes

Repair or replace the connector or terminals, then go to Step 9.

No

Go to the next step.

5

INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND

•  Verify that the BCM connector is disconnected.

•  Reconnect the negative battery cable.

•  Measure the voltage at the BCM terminal 1O (wiring harness-side).

•  Is the voltage B+?

Yes

Go to the next step.

No

Inspect the ROOM 15 A fuse and MAIN 200 A fuse.

•  If the fuse is melt:

―  Repair or replace the wiring harness for a possible short to ground.

―  Replace the fuse.

•  If the fuse is deterioration:

―  Replace the fuse.

•  If the fuse is normal:

―  Repair or replace the wiring harness for a possible open circuit.

Go to Step 9.

6

INSPECT BCM

•  Disconnect the negative battery cable.

•  Make sure to reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

•  Measure the voltage at the following terminals (wiring harness-side):

―  BCM terminal 1O

―  BCM terminal 3P

•  Is the voltage normal?
(See BODY CONTROL MODULE (BCM) INSPECTION.)

Yes

Go to the next step.

No

Replace the BCM, then go to Step 9.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

7

INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS

•  Disconnect the negative battery cable.

•  Disconnect the instrument cluster connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is there any malfunction?

Yes

Repair or replace the connector or terminals, then go to Step 9.

No

Go to the next step.

8

INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND

•  Verify that the instrument cluster connector is disconnected.

•  Reconnect the negative battery cable.

•  Turn the ignition switch to the ON position.

•  Measure the voltage at the following terminals (wiring harness-side):

―  Instrument cluster terminal 2U

―  Instrument cluster terminal 2S

•  Is the voltage B+?

Yes

Go to the next step.

No

Inspect the METER 10 A fuse and IG KEY 1 40 A fuse and MAIN 200 A fuse.

•  If the fuse is melt:

―  Repair or replace the wiring harness for a possible short to ground.

―  Replace the fuse.

•  If the fuse is deterioration:

―  Replace the fuse.

•  If the fuse is normal:

―  Repair or replace the wiring harness for a possible open circuit.

Go to the next step.

9

VERIFY TROUBLESHOOTING COMPLETED

•  Make sure to reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

•  Clear the DTC using the M-MDS.
(See CLEARING DTC [INSTRUMENT CLUSTER].)

•  Perform the instrument cluster DTC inspection using the M-MDS.
(See DTC INSPECTION [INSTRUMENT CLUSTER].)

•  Is the same DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

10

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM PCM DTC INSPECTION • Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 1.3, MZR 1.5].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 1.3, MZR 1.5].) (See DTC TABLE [MZ-CD 1.6].)
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION [MZR 1.3, MZR 1.5].) (See BATTERY INSPECTION [MZ-CD 1.6].) • Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 9. (See BATTERY RECHARGING [MZR 1.3, MZR 1.5].) (See BATTERY RECHARGING [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].)
2		No	Go to the next step.
3	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [MZR 1.3, MZR 1.5].) (See GENERATOR INSPECTION [MZ-CD 1.6].) • Is there any malfunction?	Yes	Replace the generator, then go to Step 9. (See GENERATOR REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].) (See GENERATOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
3		No	Go to the next step.
4	INSPECT BCM CONNECTOR AND TERMINALS • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
4		No	Go to the next step.
5	INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND • Verify that the BCM connector is disconnected. • Reconnect the negative battery cable. • Measure the voltage at the BCM terminal 1O (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
5		No	Inspect the ROOM 15 A fuse and MAIN 200 A fuse. • If the fuse is melt: ― Repair or replace the wiring harness for a possible short to ground. ― Replace the fuse. • If the fuse is deterioration: ― Replace the fuse. • If the fuse is normal: ― Repair or replace the wiring harness for a possible open circuit. Go to Step 9.
6	INSPECT BCM • Disconnect the negative battery cable. • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Measure the voltage at the following terminals (wiring harness-side): ― BCM terminal 1O ― BCM terminal 3P • Is the voltage normal? (See BODY CONTROL MODULE (BCM) INSPECTION.)	Yes	Go to the next step.
6		No	Replace the BCM, then go to Step 9. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
7	INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS • Disconnect the negative battery cable. • Disconnect the instrument cluster connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
7		No	Go to the next step.
8	INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND • Verify that the instrument cluster connector is disconnected. • Reconnect the negative battery cable. • Turn the ignition switch to the ON position. • Measure the voltage at the following terminals (wiring harness-side): ― Instrument cluster terminal 2U ― Instrument cluster terminal 2S • Is the voltage B+?	Yes	Go to the next step.
8		No	Inspect the METER 10 A fuse and IG KEY 1 40 A fuse and MAIN 200 A fuse. • If the fuse is melt: ― Repair or replace the wiring harness for a possible short to ground. ― Replace the fuse. • If the fuse is deterioration: ― Replace the fuse. • If the fuse is normal: ― Repair or replace the wiring harness for a possible open circuit. Go to the next step.
9	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC using the M-MDS. (See CLEARING DTC [INSTRUMENT CLUSTER].) • Perform the instrument cluster DTC inspection using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) Go to the next step.
9		No	Go to the next step.
10	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].)
10		No	DTC troubleshooting completed.