Safety Indicator System (Body Control Module and Gauge Control Module) Input Test
NOTE:
Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A.
Before testing, do the gauge control module self-diagnostic function to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
Before testing, make sure the No. A18 fuse is OK.
Before testing, make sure the No. B7, No. B8, and No. B11* fuses are OK.
*: Except L15BY engine

Body Control Module

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
NOTE: All connector views are shown from the wire side of the female terminals.
3.
Inspect the connectors and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

4.
Reconnect the connectors to the body control module, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
C27
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A18 fuse
An open or high resistance in the wire
E1
PUR*3
BLU*4
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B8 fuse
Blown No. B11*3 fuse
An open or high resistance in the wire
A2
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
A8
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
D22
GRN
Driver's door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door switch
Faulty driver's door switch ground
An open or high resistance in the wire
Driver's door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty driver's door switch
A short to ground in the wire
D23*1
LT GRN
Front passenger's door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty front passenger's door switch
Faulty front passenger's door switch ground
An open or high resistance in the wire
Front passenger's door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty front passenger's door switch
A short to ground in the wire
D23*2
LT GRN
Passenger's door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty passenger's door switch
Faulty passenger's door switch ground
An open or high resistance in the wire
Passenger's door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty passenger's door switch
A short to ground in the wire
D24*1
BRN
Left rear door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty left rear door switch
Faulty left rear door switch ground
An open or high resistance in the wire
Left rear door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty left rear door switch
A short to ground in the wire
D28*1
GRY
Right rear door open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty right rear door switch
Faulty right rear door switch ground
An open or high resistance in the wire
Right rear door closed
Measure the voltage to ground:
There should be battery voltage.
Faulty right rear door switch
A short to ground in the wire
D27
WHT
Trunk lid open
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty trunk lid latch switch
Poor ground (G701) or an open in the ground wire
An open or high resistance in the wire
Trunk lid closed
Measure the voltage to ground:
There should be battery voltage.
Faulty trunk lid latch switch
A short to ground in the wire
*1: 4-door
*2: 2-door
*3: Except L15BY engine
*4: L15BY engine

Gauge Control Module

5.
Turn the vehicle to the OFF (LOCK) mode.

6.

7.
Inspect the connector and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 8.

8.
Reconnect the connector, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 9.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
A1
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A18 fuse
An open or high resistance in the wire
A17
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B7 fuse
An open or high resistance in the wire
A4
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
A32
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire

9.
If multiple failures are found on more than one control unit, replace the body control module. If input failures are related to a particular control unit, replace the gauge control module.