DTC P0850:29 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c406400

DESCRIPTION

Erratic signal of TR switch

DETECTION CONDITION

•  CAN and TR switch signals do not correspond while the ignition switch is ON.

―  Keyless control module detects that the TR switch stuck off.

•  Starter monitor input voltage is above the specification when the CAN signal is P or N range.

―  Keyless control module detects that the TR switch stuck ON.

•  Starter monitor input voltage is less than the specification when the CAN signal is R or D range.

POSSIBLE CAUSE

•  Multiplex communication system DTC is stored

•  Starter relay malfunction

•  TR switch connector or terminals malfunction

•  TR switch malfunction

•  Keyless control module connector or terminals malfunction

•  Short to ground in wiring harness between the following terminals:

―  Starter relay terminal A—Keyless control module terminal 2F

―  Starter relay terminal A—TR switch terminal F

―  TR switch terminal A—Keyless control module terminal 3T

•  Short to power supply in wiring harness between the following terminals:

―  Starter relay terminal A—Keyless control module terminal 2F

―  Starter relay terminal A—TR switch terminal F

―  TR switch terminal A—Keyless control module terminal 3T

•  Open circuit in wiring harness between the following terminals:

―  Starter relay terminal A—Keyless control module terminal 2F

―  Starter relay terminal A—TR switch terminal F

―  TR switch terminal A—Keyless control module terminal 3T

•  Keyless control module malfunction

DESCRIPTION	Erratic signal of TR switch
DETECTION CONDITION	• CAN and TR switch signals do not correspond while the ignition switch is ON. ― Keyless control module detects that the TR switch stuck off. • Starter monitor input voltage is above the specification when the CAN signal is P or N range. ― Keyless control module detects that the TR switch stuck ON. • Starter monitor input voltage is less than the specification when the CAN signal is R or D range.
POSSIBLE CAUSE	• Multiplex communication system DTC is stored • Starter relay malfunction • TR switch connector or terminals malfunction • TR switch malfunction • Keyless control module connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Starter relay terminal A—Keyless control module terminal 2F ― Starter relay terminal A—TR switch terminal F ― TR switch terminal A—Keyless control module terminal 3T • Short to power supply in wiring harness between the following terminals: ― Starter relay terminal A—Keyless control module terminal 2F ― Starter relay terminal A—TR switch terminal F ― TR switch terminal A—Keyless control module terminal 3T • Open circuit in wiring harness between the following terminals: ― Starter relay terminal A—Keyless control module terminal 2F ― Starter relay terminal A—TR switch terminal F ― TR switch terminal A—Keyless control module terminal 3T • Keyless control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	CONFIRM MULTIPLEX COMMUNICATION SYSTEM DTC • Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Are any multiplex communication system DTCs present?	Yes	Go to the applicable DTC inspection. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI i-stop))].) (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI i-stop, ZY))].)
1		No	Go to the next step.
2	INSPECT STARTER RELAY • Switch the ignition to off. • Disconnect the negative battery cable. • Remove the starter relay. • Inspect the starter relay. (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the relay, then go to Step 9.
2		No	Go to the next step.
3	INSPECT TR SWITCH CONNECTOR AND TERMINALS • Disconnect the TR switch connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT TR SWITCH • Reconnect the TR switch connector. • Reconnect the negative battery cable. • Inspect the TR switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].) • Is there any malfunction?	Yes	Replace the TR switch, then go to Step 9. (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION [FS5A-EL].)
4		No	Go to the next step.
5	INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS • Disconnect the negative battery cable. • Disconnect the keyless control module connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
5		No	Go to the next step.
6	INSPECT TR SWITCH CIRCUIT FOR SHORT TO GROUND • Starter relay is removed, and keyless control module connector is disconnected. • Disconnect the TR switch connector. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Starter relay terminal A ― TR switch terminal A • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 9.
6		No	Go to the next step.
7	INSPECT TR SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY • Starter relay is removed, and TR switch and keyless control module connectors are disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage at the following terminals (wiring harness-side): ― Starter relay terminal A ― TR switch terminal A • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
7		No	Go to the next step.
8	INSPECT TR SWITCH CIRCUIT FOR OPEN CIRCUIT • Starter relay is removed, and TR switch and keyless control module connectors are disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. • Inspect for continuity between the following terminals (wiring harness-side): ― Starter relay terminal A—Keyless control module terminal 2F ― Starter relay terminal A—TR switch terminal F ― TR switch terminal A—Keyless control module terminal 3T • Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect the disconnected connectors. • Reconnect the negative battery cable. • Operate the advanced key to activate the keyless control module. • Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Switch the ignition to ON using the advanced key. • Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Is the same DTC present?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
9		No	Go to the next step.
10	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
10		No	DTC troubleshooting completed.