Coolant Regulation Valve - N515-, Checking

General Description

The Coolant Regulation Valve -N515- is ground-side switched by the Engine Control Module -J623- to operate.

Special tools and workshop equipment required

Multimeter.
Wiring Diagram.
Scan Tool.

Test requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with automatic transmission, ensure the selector lever position is in "P".
Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake applied.
Observe all safety precautions: .
View clean working conditions: .

Test Procedure

NOTE:

Note the CA1 and CMC both use the ECM connector T105a, and the CA2 uses the ECM connector T105b. Both connectors are identical except for the suffix of "a" or "b". For simplicity, please use the suffix "a".

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to . -- Was Complaint verified?	-- YES: GO TO: Step 2 Coolant Regulation Valve - N515-, CHECKING - 2 . -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Coolant Regulation Valve -N515- harness connector. CHECK: Coolant Regulation Valve -N515- component connector terminals 1 to 2 for resistance. SPECIFIED VALUE: 9 - 14 Ω (@ approx. 20° C). -- Was Value obtained?	-- YES: GO TO: Step 3 Coolant Regulation Valve - N515-, CHECKING - 3 . -- NO: REPLACE: Coolant Regulation Valve -N515-. Refer to appropriate Service Information. GO TO: Step 5 Coolant Regulation Valve - N515-, CHECKING - 5 .
3	IGNITION: ON. CHECK: Coolant Regulation Valve -N515- harness connector terminal 1 to ground for voltage. IGNITION: OFF. SPECIFIED VALUE: Battery voltage. -- Was Value obtained?	-- YES: GO TO: Step 4 Coolant Regulation Valve - N515-, CHECKING - 4 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Coolant Regulation Valve - N515-, CHECKING - 5 .
4	REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information. CHECK: Coolant Regulation Valve -N515- harness connector terminal 2 to the Engine Control Module - J623- harness connector T105a / 102 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: TIP: The Coolant Regulation Valve -N515- may fail under loaded operation; please swap a known good Coolant Regulation Valve -N515- prior to continuing to the next step. GO TO: Step 5 Coolant Regulation Valve - N515-, CHECKING - 5 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Coolant Regulation Valve - N515-, CHECKING - 5 .
5	Final Procedure Perform a road test to verify repair. -- Does the original DTC return?	-- YES: CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins. REPAIR: As necessary. If all electrical connections are OK: REPLACE: Engine Control Module -J623-. Refer to appropriate Service Information. Clear the DTC's. Refer to . Repair is complete. Generate Readiness Code. Refer to . Return vehicle to Customer. -- NO: Perform the diagnostic procedure for any DTC's. If no DTC's return, the repair is complete. Return vehicle to customer.