Keyless Access System (Body Control Module and Electric Steering Lock) Input Test
SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service.

NOTE:
Make sure the fuses associated with the system is OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

Body Control Module

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

2.
Disconnect the body control module connectors.
Body Control Module Connector A (14P) (female terminals):
Body Control Module Connector B (36P) (female terminals):
Body Control Module Connector C (28P) (female terminals):
Body Control Module Connector D (40P) (female terminals):
Body Control Module Connector E (24P) (female terminals):
Body Control Module Connector F (36P) (female terminals):
Body Control Module Connector G (32P) (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 look OK, go to step 4.

4.
With the connectors still disconnected, 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, then go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
D36
LT BLU
Under all conditions
Check for continuity between terminal D36 and data link connector (DLC) terminal No. 7:
There should be continuity.
An open or high resistance in the K LINE wire
Check for continuity between terminal D36 and body ground:
There should be no continuity.
A short to ground in the K LINE wire
F21
RED
Under all conditions
Check for continuity between terminal F21 and data link connector (DLC) terminal No. 15:
There should be continuity.
An open or high resistance in the L-LINE wire
Check for continuity between terminal F21 and body ground:
There should be no continuity.
A short to ground in the L-LINE wire
G18
YEL
Press the engine start/stop switch
Measure the voltage to ground:
There should be battery voltage.
Faulty engine start/stop switch
An open or high resistance in the wire
G9
BLK
Press the engine start/stop switch
Check for continuity to ground:
There should be continuity.
Faulty engine start/stop switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire

5.
Reconnect the connectors, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
With electric steering lock: If all the input tests prove OK, then go to step 6.
Without electric steering lock: If all the input tests prove OK, replace the body control module.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
B16
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
C27
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
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 (G401)
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 (G401)
An open or high resistance in the ground wire
G27
RED
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
E1
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
G10
YEL
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
G11
LT BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
C1
GRN
Shift lever in P position/mode
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty transmission range switch
An open or high resistance in the wire
Shift lever in any other position/mode other than P
Measure the voltage to ground:
There should be battery voltage.
Faulty transmission range switch
A short to ground in the wire
C26
LT BLU
Shift lever in P position/mode
Measure the voltage to ground:
There should be battery voltage.
Faulty park pin switch
A short to ground in the wire
Shift lever in any other position/mode than P
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty park pin switch
Poor ground (G402) or an open in the ground wire
An open or high resistance in the wire
C25
GRN
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Faulty brake pedal position switch
An open or high resistance in the wire
G3*
PUR
Electric steering lock (LOCK)
Measure the voltage to ground:
There should be about 5 V.
Faulty electric steering lock
A short to ground in the wire
Electric steering lock (UNLOCK)
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty electric steering lock
An open or high resistance in the wire

*: With electric steering lock
Electric Steering Lock

6.
Turn the vehicle to the OFF (LOCK) mode.

7.
Disconnect the electric steering lock 12P connector.
Electric Steering Lock 12P Connector (female terminals)
8.
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 look OK, then go to step 9.

9.
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 10.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
3
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
12
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
7
BRN
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
8
PUR
Electric steering lock (LOCK)
Measure the voltage to ground:
There should be about 5 V.
Faulty body control module
A short to ground in the wire
Electric steering lock (UNLOCK)
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty electric steering lock
An open or high resistance in the wire
5
YEL
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Faulty body control module
An open or high resistance in the wire
A short to ground in the wire

10.
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 control unit.