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. A12-1 (60 A), No. A12-3 (30 A), No. A12-4 (30 A) and the No. A21 (10 A) fuses in the under-hood fuse/relay box are OK.
	Before testing. make sure the No. B9 (20 A), No. B31 (10 A), No. B37 (7.5 A) fuse in the under-dash fuse/relay box are OK.

1.	Press the engine start/stop button to select the OFF mode.

2.	Disconnect the keyless access control unit connectors. NOTE: All connector views are shown from the wire side of the female terminals.

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.

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

YEL

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

B28

YEL

Connect terminals B14 and C11 with a jumper wire, and connect terminal C1 to ground with a jumper wire.

Measure the voltage to ground:
There should be battery voltage.

	Blown No. B9 (20 A) fuse in the under-dash fuse/relay box
	Faulty under-dash fuse/relay box
	Faulty under-dash sub relay box
	An open or high resistance in the wire

C12

PUR

Connect terminals B14 and C23 with a jumper wire, and connect terminal C1 to ground with a jumper wire.

Measure the voltage to ground:
There should be battery voltage.

	Blown No. B37 (7.5 A) fuse in the under-dash fuse/relay box
	Faulty under-dash fuse/relay box
	Faulty under-dash sub relay box
	Faulty center junction box
	An open or high resistance in the wire

B12

BLU

Press the engine start/stop button

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

GRN

Press the engine start/stop button

Check for continuity to ground:
There should be continuity.

	Poor ground (G501) or an open in the ground wire
	Faulty engine start/stop switch
	An open or high resistance in the wire

B21

GRY

Jump the SCS line with the HDS, disconnect PCM connector A (51P)

Check for continuity between terminal B21 and PCM connector A (51P) terminal No. 21^*1:
There should be continuity.

	Faulty under-dash fuse/relay box
	An open in the S-NET wire

Check for continuity between terminal B21 and PCM connector A (51P) terminal No. 38^*2:
There should be continuity.

Disconnect the under-dash fuse/relay box connector M (12P)

Check for continuity between terminal B21 and under-dash fuse/relay box connector M (12P) terminal No. 10:
There should be continuity.

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

*1: K24W1 engine
*2: J35Y1 and J35Y2 engines

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. (Without electric steering lock)
	If all the input tests prove OK, then go to step 6.(With electric steering lock)

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result
is not obtained

RED

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

WHT

Under all conditions

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
	Faulty under-hood fuse/relay box
	Faulty under-dash fuse/relay box
	Faulty center junction box
	Faulty driver's junction box
	An open or high resistance in the wire

A17

BRN

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

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

C10

RED

Power mode ON

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A12-3 (30 A) fuse in the under-hood fuse/relay box
	Faulty under-dash sub relay box
	An open or high resistance in the wire

YEL

Power mode ON

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A12-4 (30 A) fuse in the under-hood fuse/relay box
	Faulty under-dash sub relay box
	An open or high resistance in the wire

C22

BLK

Power mode ON

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A12-3 (30A) fuse in the under-hood fuse/relay box
	Faulty under-dash sub relay box
	An open or high resistance in the wire

B22^*1

LT GRN

Power mode ON

Measure the voltage to ground:
There should be battery voltage.

An open or high resistance in the wire

A30

WHT

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

RED

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

LT GRN

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

YEL

Trunk lid spoiler switch pushed (2-door)
Trunk lid outer handle switch pushed (4-door)

Measure the voltage to ground:
There should be less than 0.2 V.

	Faulty trunk lid spoiler switch (2-door)
	Faulty trunk lid outer handle switch (4-door)
	Poor ground (G603) or an open in the ground wire
	An open or high resistance in the wire

Trunk lid spoiler switch released (2-door)
Trunk lid outer handle switch released (4-door)

Measure the voltage to ground:
There should be about 5 V.

	Faulty trunk lid spoiler switch (2-door)
	Faulty trunk lid outer handle switch (4-door)
	A short to ground in the wire

B5^*3

BRN

Clutch pedal pressed

Measure the voltage to ground:
There should be less than 0.2 V.

	Faulty replace clutch pedal position switch A
	Poor ground (G401) or an open in the ground wire
	An open or high resistance in the wire

Clutch pedal released

Measure the voltage to ground:
There should be about 5 V.

	Faulty replace clutch pedal position switch A
	A short to ground in the wire

B11^*4

GRY

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^*4

BRN

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 (G503) or an open in the ground wire
	An open or high resistance in the wire

LT GRN

Brake pedal pressed

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A6 (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
	An open or high resistance in the wire

C7*²

BRN

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

*1: With remote engine start
*2: With electric steering lock
*3: M/T
*4: A/T, CVT

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.	Press the engine start/stop button to select the OFF mode.

7.	Disconnect the electric steering lock 12P connector.

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, reconnect the connectors to electric steering lock, then go to step 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

RED

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

YEL

Power mode ON

Measure the voltage to ground:
There should be battery voltage.

	Blown No. B9 (20 A) fuse in the under-dash fuse/relay box
	An open or high resistance in the wire

BLK

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

BRN

Electric steering lock (LOCK or UNLOCK)

Measure the voltage to ground:
There should be about 5 V.

	Faulty keyless access control unit
	A short to ground in the wire

Electric steering lock

Measure the voltage to ground:
There should be less than 0.2 V.

An open or high resistance in the wire

ORN

Power mode ON

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.