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

id09021c406400

DESCRIPTION

Error signal of TR switch

DETECTION CONDITION

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

―  IG1 relay output circuit is active.

―  Selector lever in P or N position

―  Engine is not running.

POSSIBLE CAUSE

•  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 E—Keyless control module terminal 4AA

―  Starter relay terminal E—TR switch terminal A

•  Short to power supply in wiring harness between TR switch terminal F and keyless control module terminal 4K

•  Open circuit in wiring harness between the following terminals:

―  Starter relay terminal E—Keyless control module terminal 4AA

―  Starter relay terminal E—TR switch terminal A

•  Keyless control module malfunction

DESCRIPTION	Error signal of TR switch
DETECTION CONDITION	• CAN and TR switch signals do not correspond, while the ignition switch is ON. ― IG1 relay output circuit is active. ― Selector lever in P or N position ― Engine is not running.
POSSIBLE CAUSE	• 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 E—Keyless control module terminal 4AA ― Starter relay terminal E—TR switch terminal A • Short to power supply in wiring harness between TR switch terminal F and keyless control module terminal 4K • Open circuit in wiring harness between the following terminals: ― Starter relay terminal E—Keyless control module terminal 4AA ― Starter relay terminal E—TR switch terminal A • Keyless control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT TR SWITCH CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • 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 8.
1		No	Go to the next step.
2	INSPECT TR SWITCH • 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 8. (See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FS5A-EL].) (See TRANSAXLE RANGE (TR) SWITCH INSTALLATION [FS5A-EL].)
2		No	Go to the next step.
3	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION • 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 8.
3		No	Go to the next step.
4	INSPECT TR SWITCH CIRCUIT FOR SHORT TO GROUND • TR switch and keyless control module connectors are disconnected. • Inspect for continuity between starter relay terminal E (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
4		No	Go to the next step.
5	INSPECT TR SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY • TR switch and keyless control module connectors are disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON (engine off). • Measure the voltage at the TR switch terminal F (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
5		No	Go to the next step.
6	INSPECT TR SWITCH CIRCUIT FOR OPEN CIRCUIT • 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 E—Keyless control module terminal 4AA ― Starter relay terminal E—TR switch terminal A • Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 8.
7	INSPECT KEYLESS CONTROL MODULE • Make sure to reconnect the disconnected connectors. • Reconnect the negative battery cable. • Bring the valid key into the vehicle. • Switch the ignition to ON (engine off). • Measure the voltage at the keyless control module terminal 4AA (wiring harness-side) with the selector lever in P or N position. • Is the voltage more than 4 V?	Yes	Go to the next step.
7		No	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
8	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect the disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • 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	Repeat the inspection from Step 1. If the malfunction recurs, replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
8		No	Go to the next step.
9	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].)
9		No	DTC troubleshooting completed.