Keyless Access System (Keyless Access Control Unit, Keyless Access and Electric Steering Lock) Input Test
Keyless Access Control Unit

NOTE:
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, make sure the No. A2-3 (60 A), No. A3-3 (30 A), No. A3-4 (30 A), and No. A29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B4 (15 A), No. B19 (7.5 A), and No. B31 (10 A) fuses in the under-dash fuse/relay box are OK.

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

2.
Disconnect the following connectors.

Keyless access control unit connector A (32P)
Keyless access control unit connector B (28P)
Keyless access control unit connector C (24P)

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 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
B20
LT BLU
Under all conditions
Check for continuity between terminal B20 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 B20 and body ground:
There should be no continuity.
A short to ground in the K LINE wire
C3
GRY
Under all conditions
Check for continuity between terminal C3 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 C3 and body ground:
There should be no continuity.
A short to ground in the L-LINE wire
B12
PUR
Press the engine start/stop switch
Measure the voltage to ground:
There should be battery voltage.
Blown No. B31 (10 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
Faulty engine start/stop switch
An open or high resistance in the wire
B8
BRN
Press the engine start/stop switch
Check for continuity to ground:
There should be continuity.
Poor ground (G502) or an open in the ground wire
Faulty engine start/stop switch
An open or high resistance in the wire
B21
YEL
Jump the SCS line with the HDS, and wait more than 1 minute, disconnect the PCM connector A (51P)
Check for continuity between terminal B21 and PCM connector A (51P) terminal No. 21:
There should be continuity.
An open in the S-NET wire
PCM
Disconnect the under-dash fuse/relay box connector P (20P)
Check for continuity between terminal B21 and under-dash fuse/relay box connector P (20P) terminal No. 4:
There should be continuity.
Faulty under-dash fuse/relay box
An open in the S-NET wire
Check for continuity between terminal B21 and body ground:
There should be no continuity.
A short to ground in the S-NET 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.
If all the input tests prove OK, replace the keyless access control unit.*1
If all the input tests prove OK, then go to step 6.*2

*1: Without electric steering lock
*2: With electric steering lock

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
A1
BLK
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B31 (10 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
B14
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A29 (10 A) fuse in the under-hood fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
A17
BRN
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G502)
An open or high resistance in the ground wire
B15
BRN
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G502)
An open or high resistance in the ground wire
B28
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B4 (15 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
Faulty under-dash subrelay box
An open or high resistance in the wire
C12
PUR
Vehicle ACC mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B19 (7.5 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
Faulty under-dash subrelay box
An open or high resistance in the wire
C10
LT GRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. A3-3 (30 A) fuse in the under-hood fuse/relay box
Faulty under-dash subrelay box
An open or high resistance in the wire
C8
GRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. A3-4 (30 A) fuse in the under-hood fuse/relay box
Faulty under-dash subrelay box
An open or high resistance in the wire
C22
RED
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. A3-3 (30 A) fuse in the under-hood fuse/relay box
Faulty under-dash subrelay box
An open or high resistance in the wire
A30
GRN
Driver's door outer handle lock switch pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door outer handle
Poor ground (G501) or an open in the ground wire
An open or high resistance in the wire
Driver's door outer handle lock switch released
Measure the voltage to ground:
There should be about 5 V.
Faulty driver's door outer handle
A short to ground in the wire
A23
GRY
Front passenger's door outer handle lock switch pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty front passenger's door outer handle
Poor ground (G503) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door outer handle lock switch released
Measure the voltage to ground:
There should be about 5 V.
Faulty front passenger's door outer handle
A short to ground in the wire
B19
BLU
Parking brake pedal pressed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty parking brake switch
Faulty parking brake switch ground
An open or high resistance in the wire
Parking brake pedal released
Measure the voltage to ground:
There should be about 5 V.
Faulty parking brake switch
A short to ground in the wire
A9
LT GRN
Tailgate outer handle switch pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty tailgate outer handle/lock switch
Poor ground (G603) or an open in the ground wire*1
Power tailgate control unit*2
An open or high resistance in the wire
Tailgate outer handle switch released
Measure the voltage to ground:
There should be about 5 V.
Faulty tailgate outer handle/lock switch
A short to ground in the wire
B11
LT GRN
Shift lever in P position
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty transmission range switch
Poor ground (G101) or an open in the ground wire
An open or high resistance in the wire
Shift lever in any position other than P
Measure the voltage to ground:
There should be about 5 V.
Faulty transmission range switch
A short to ground in the wire
B10
LT BLU
Shift lever in P position
Measure the voltage to ground:
There should be about 5 V.
Faulty park pin switch
A short to ground in the wire
Shift lever in any position other than P
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty park pin switch
Poor ground (G502) or an open in the ground wire
An open or high resistance in the wire
B1
YEL
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Blown No. A16 (10 A) fuse in the under-hood fuse/relay box
Faulty under-dash fuse/relay box
Faulty brake pedal position switch
An open or high resistance in the wire
A short to ground in the wire
Brake pedal released
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty brake pedal position switch
A short in the wire
C7*
PNK
Electric steering lock (LOCK)
Measure the voltage to ground:
There should be about 5 V.
Faulty electric steering lock control unit
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 control unit
An open or high resistance in the wire
*: With electric steering lock

Electric Steering Lock

NOTE: SRS components are located in this area. Review the SRS component locations, and precautions and procedures before doing repairs or servicing.

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

7.
Disconnect the following connector.

Electric steering lock 12P connector
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
BLK
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B31 (10 A) fuse in the under-dash fuse/relay box
An open or high resistance in the wire
12
BLU
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B4 (15 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
Faulty under-dash subrelay box
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 (G502)
An open or high resistance in the ground wire
8
PNK
Electric steering lock (LOCK)
Measure the voltage to ground:
There should be about 5 V.
Faulty keyless access control unit
A short to ground in the wire
An open or high resistance in the wire
Electric steering lock (UNLOCK)
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty electric steering lock
5
ORN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage
Faulty keyless access control unit
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 keyless access control unit. If input failures are related to a particular control unit, replace the control unit.