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. A1 (100 A) and the No. A2 (70 A) fuses in the 12 volt battery terminal fuse box are OK.
Before testing, make sure the No. B21 (15 A) and the No. B29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. C32 (15 A) and the No. C3 (10 A) fuses in the under-dash fuse/relay box are OK.
Some models have the rear outer handle touch sensor. Perform the troubleshooting flow where applicable.

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

2.
Disconnect the keyless access control unit connectors.

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
C4
LT BLU
Under all conditions
Check for continuity between terminal C4 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 C4 and body ground:
There should be no continuity.
A short to ground in the K LINE wire
C6
YEL
Under all conditions
Check for continuity between terminal C6 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 C6 and body ground:
There should be no continuity.
A short to ground in the L LINE wire
B10
BLU
Press the engine start/stop button
Measure the voltage to ground:
There should be battery voltage.
Blown No. C3 (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
B11
LT BLU
Press the engine start/stop button
Check for continuity to ground:
There should be continuity.
Faulty keyless access control unit
Faulty engine start/stop switch
An open or high resistance in the wire
C5
BLU
Jump the SCS line with the HDS, disconnect PCM connector A (51P)
Check for continuity between terminal under-dash fuse/relay box connector Q (40P) terminal No. 21 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 D (24P)
Check for continuity between terminal C5 and under-dash fuse/relay box connector D (24P) terminal No. 18:
There should be continuity.
An open in the S-NET wire
Faulty under-dash fuse/relay box
Check for continuity between terminal C5 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, then go to step 6.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
A1
GRY
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. C3 (10 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
B18
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B29 (10 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
A17
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G403)
An open or high resistance in the ground wire
B36
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G403)
An open or high resistance in the ground wire
B30
WHT
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. D1-2 (30 A) fuse in the auxiliary under-dash fuse box
Faulty under-dash subrelay box
An open or high resistance in the wire
B34
WHT
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. C32 (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
B29
YEL
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. D4 (30 A) fuse in the auxiliary under-dash fuse box
Faulty under-dash subrelay box
An open or high resistance in the wire
B27
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. D1-2 (30 A) fuse in the auxiliary under-dash fuse box
Faulty under-dash subrelay box
An open or high resistance in the wire
C14
WHT
Driver's door outer handle lock button pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty driver's door outer handle
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Driver's door outer handle lock button 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
C13
RED
Front passenger's door outer handle lock button pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty front passenger's door outer handle
Poor ground (G403) or an open in the ground wire
An open or high resistance in the wire
Front passenger's door outer handle lock button 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
B1
BLU
Parking brake lever pulled
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 lever released
Measure the voltage to ground:
There should be about 5 V.
Faulty parking brake switch
A short to ground in the wire
C16
PUR
Tailgate outer handle switch pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty tailgate outer handle switch
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 switch
A short to ground in the wire
C10*2
RED
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
C9
LT GRN*1
TAN*2
Shift lever in P position*2
Clutch pedal released*1
Measure the voltage to ground:
There should be about 5 V.
Faulty clutch pedal position switch*1
Faulty park pin switch*2
A short to ground in the wire
Shift lever in any position other than P*2
Clutch pedal pressed*1
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty clutch pedal position switch*1
Faulty park pin switch*2
Poor ground (G302)*1 (G403)*2 or an open in the ground wire
An open or high resistance in the wire
B19
LT GRN
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Blown No. B6 (10 A) fuse in the under-hood 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
B3*3
BRN
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

*1: M/T
*2: CVT
*3: 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.
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

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

7.
Disconnect the 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
GRY
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. C3 (10 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
12
WHT
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. C32 (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
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
8
BRN
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
TAN
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.