Infiniti M35/M45 Y50. Manual - part 77

A/T SHIFT LOCK SYSTEM

AT-231

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TCWT0354E

AT-232

A/T SHIFT LOCK SYSTEM

Diagnostic Procedure

NCS001QS

SYMPTOM:

●

Selector lever cannot be moved from “P” position with key in ON position and brake pedal
applied.

●

Selector lever can be moved from “P” position with key in ON position and brake pedal released.

1. 

CHECK SELECTOR LEVER POSITION

Check the selector lever position for damage. Refer to 

AT-228, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Adjust control linkage. Refer to 

AT-227, "Adjustment of A/T Position"

 .

2. 

CHECK POWER SOURCE

1.

Turn ignition switch OFF.

2.

Disconnect shift lock relay.

3.

Check voltage between shift lock relay E35 terminal 2 and
ground.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

Voltage

Brake pedal depressed:

Battery voltage

Brake pedal released:

0 V

SCIA6866E

A/T SHIFT LOCK SYSTEM

AT-233

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3. 

DETECT MALFUNCTIONING ITEM

Check the following.

●

Harness for short or open between battery and stop lamp switch harness connector E124 terminal 1

●

Harness for short or open between stop lamp switch harness connector E124 terminal 2 and shift lock
relay E35 terminal 2

●

10A fuse [No.20, located in the fuse block (J/B)] 

●

Stop lamp switch

–

Check continuity between stop lamp switch harness connector E124 terminals 1 and 2

Check stop lamp switch after adjusting brake pedal — refer to   

BR-6, "BRAKE PEDAL"

 .

●

ICC brake hold relay. Refer to 

ACS-69, "ICC Brake Hold Relay"

 . (With ICC only)

●

Harness for short or open between battery and ICC brake hold relay E80 terminal 3. Refer to 

ACS-50,

"DTC 13 STOP LAMP RLY FIX"

 . (With ICC only)

●

Harness for short or open between ICC brake hold relay E80 terminal 5 and shift lock relay E35 terminal
2. (With ICC only)

●

Harness for short or open between ICC sensor integrated unit harness connector E61 terminal 2 and ICC
brake hold relay E80 terminal 2. Refer to 

ACS-50, "DTC 13 STOP LAMP RLY FIX"

 . (With ICC only)

●

Harness for short or open between ICC brake hold relay E80 terminal 1 and ground. Refer to 

ACS-50,

"DTC 13 STOP LAMP RLY FIX"

 . (With ICC only)

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect shift lock relay.

3.

Check continuity between shift lock relay E35 terminal 1 and
ground. 

CAUTION:

Connect test probe (BLACK) to shift lock relay, and test
probe (RED) to ground.

If OK, check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

SCIA4990E

Continuity should exist.

SCIA6931E

AT-234

A/T SHIFT LOCK SYSTEM

5. 

CHECK INPUT SIGNAL A/T DEVICE

1.

Turn ignition switch OFF.

2.

Disconnect A/T device harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between A/T device harness connector M133 ter-
minal 7 and ground.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING ITEM

Check the following.

●

Harness for short or open between push-button ignition switch and shift lock relay E35 terminal 5

●

Harness for short or open between shift lock relay E35 terminal 3 and A/T device harness connector
M133 terminal 7

●

10A fuse [No.12, located in the fuse block (J/B)]

●

Push-button ignition switch (Refer to 

PG-3, "POWER SUPPLY ROUTING CIRCUIT"

 .)

●

Shift lock relay

–

Check continuity between shift lock relay E35 terminal 3 and 5

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T device harness connector.

3.

Check continuity between A/T device harness connector M133
terminal 8 and ground.

If OK, check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Voltage

Brake pedal depressed:

Battery voltage

Brake pedal released:

0 V

SCIA6867E

Condition

Continuity

12V direct current supply between terminal 1 and 2

Yes

OFF

No

SCIA1245E

Continuity should exist.

SCIA6868E