Key Interlock System Circuit Troubleshooting
Key Interlock System Circuit Troubleshooting
NOTE:
SRS components are located in this area. Review the SRS component locations, and precautions and procedures before doing repairs or servicing.
Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connectors.
1.
DTC check:

DTC check
?1.
Check the CVT system DTCs with the HDS.


Are DTCs indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
Key interlock system check:

Key interlock system check
?1.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
Park Pin Switch
    

Is the transmission range switch indicated ON when the shift lever is in P, and does the transmission range switch indicate OFF when the shift lever is shifted to any position other than P?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 10.
3.
Determine possible failure area (steering lock, others):

Determine possible failure area (steering lock, others)
?1.
Move the shift lever to P and set the parking brake.

?2.
Remove the steering column covers.

?3.
Disconnect the following connector.

?4.
Turn the ignition switch to ACCESSORY (I).

?5.
Check if the ignition switch can be turned to LOCK (0).

Can the ignition switch be turned to LOCK (0)?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Faulty key interlock solenoid; replace the steering lock.?
4.
Fuse check:

Fuse check
?1.
Check the following fuse.
Fuse
No. B37 (7.5 A)
Location
Under-dash fuse/relay box

Is the fuse OK?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Replace the fuse. If the fuse blows again, repair a short to ground in the No. B37 (7.5 A) fuse circuit.
5.
Shorted wire check (KEY SOL- line):

Shorted wire check (KEY SOL- line)
?1.
Make sure the ignition switch is turned to LOCK (0).

?2.
Disconnect the following connector.
Under-dash fuse/relay box connector P (24P)

?3.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Test circuit
KEY SOL-
Test point 1
Steering lock 7P connector No. 4 (LT BLU)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire.?
     
NO
     
     
     
The KEY SOL- wire is not shorted to ground. Go to step 6.
6.
Open wire check (KEY SOL- line):

Open wire check (KEY SOL- line)
?1.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Test circuit
KEY SOL-
Test point 1
Under-dash fuse/relay box connector P (24P) No. 14 (LT BLU)
Test point 2
Steering lock 7P connector No. 4 (LT BLU)


Is there continuity?

     
YES
     
     
     
The KEY SOL- wire is OK. Go to step 7.
     
NO
     
     
     
Repair an open or high resistance in the wire.?
7.
Park pin switch check:

Park pin switch check
?1.
Remove the center console.

?2.
Disconnect the following connector.

?3.
Do the park pin switch test.

Is switch OK?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
Replace the park pin switch:
8.
Shorted wire check (P-PIN SW line):

Shorted wire check (P-PIN SW line)
?1.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Select lever 12P connector: disconnected
Test circuit
P-PIN SW
Test point 1
Select lever 4P connector No. 2 (BRN)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire.?
     
NO
     
     
     
The P-PIN SW wire is OK. Go to step 9.
9.
Open wire check (GND line):

Open wire check (GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Select lever 4P connector: disconnected
Test circuit
GND
Test point 1
Select lever 4P connector No. 1 (BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 10.
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G503).?
10.
Transmission range switch check:

Transmission range switch check
?1.
Do the transmission range switch test (CVT).

Is switch OK?

     
YES
     
     
     
Go to step 11.
     
NO
     
     
     
11.
Open wire check (ATP-P line):

Open wire check (ATP-P line)
?1.
Disconnect the following connectors.

?2.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Select lever 4P connector: disconnected
Under-dash fuse/relay box connector E (36P): disconnected
Transmission range switch 10P connector: disconnected
Test circuit
ATP-P
Test point 1
Under-dash fuse/relay box connector E (36P) No. 17 (GRY)
Test point 2
Transmission range switch 10P connector No. 5 (BLU)


Is there continuity?

     
YES
     
     
     
The ATP-P wire is OK. Go to step 12.
     
NO
     
     
     
Repair an open or high resistance in the wire.?
12.
Open wire check (GND line):

Open wire check (GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0)
Steering lock 7P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected
Select lever 4P connector: disconnected
Under-dash fuse/relay box connector E (36P): disconnected
Transmission range switch 10P connector: disconnected
Test circuit
GND
Test point 1
Transmission range switch 10P connector No. 1 (BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Faulty MICU, replace the under-dash fuse/relay box.?
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G101).?