Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
AB12 CHECK THE COLD START RELAY
• Ignition OFF.
• Cold Start Relay connector disconnected.
• Connect a 5 amp fused jumper wire between the following:
Point A Cold Start Relay Connector, Component Side | Point B Vehicle Battery |
|---|---|
B+ | Positive terminal |
• Connect a 5 amp fused jumper wire between the following:
Point A Cold Start Relay Connector, Component Side | Point B Vehicle Battery |
|---|---|
CSRC | Negative terminal |
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Cold Start Relay Connector, Component Side | ( - ) Vehicle Battery |
|---|---|
CSM | Negative terminal |
• Remove the jumper wire from the CSRC circuit.
Is the voltage greater than 10.5 V with the jumper wire connected and less than 1 V with the jumper wire removed?
Yes | No |
|---|---|
GO to AB13 . | INSTALL a new Cold Start relay. Clear the PCM DTCs. REPEAT the self-test. |
AB13 CHECK THE VOLTAGE TO THE COLD START RELAY
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Cold Start Relay Connector, Harness Side | ( - ) |
|---|---|
B+ | Ground |
Is the voltage greater than 10.5 V?
Yes | No |
|---|---|
GO to AB14 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.