Shut off while driving, code P1633

Tiny
TINA 123
  • MEMBER
  • 2001 FORD FOCUS
  • 4 CYL
  • 100,000 MILES
Cranks, obd code p1633, car shut off while driving, Pat's proves out, new battery connections, odometer does not have dashes.
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Thursday, December 27th, 2018 AT 5:00 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Hi and thanks for using 2CarPros.

Here are the diagnostics for this code. Take a look through them and let me know if you have questions.

_______

QB: DIAGNOSTIC TROUBLE CODE (DTC) P0603/P1605/P1633 - INTRODUCTION
QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633 Introduction

QB: Pinpoint Tests See: Computers and Control Systems > Pinpoint Tests > QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633 - Pinpoint Test

Note

This Pinpoint Test is intended to diagnose the following:

- Battery terminal condition
- Keep Alive Power (KAPWR) wire routing
- Harness circuit: KAPWR
- Powertrain Control Module (PCM) (12A650)

Pinpoint Test Schematics and Connectors

______________

QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633

QB: Introduction See: Computers and Control Systems > Pinpoint Tests > QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633 - Introduction

QB1 CHECK BATTERY TERMINALS

Note:If KAPWR is interrupted to the PCM (that is, when a breakout box is installed or the battery is disconnected), DTC P0603/P1605 can be generated on the first power-up.

- Inspect the battery cables for loose connections, corrosion.
Are the battery terminal connections in good condition?
Yes

- KEY OFF. Battery terminals are OK. GO to QB2
.

No

- REPAIR battery terminals as necessary.

QB2 INSPECT ENGINE COMPARTMENT FOR PROPER WIRE ROUTING

- Inspect Electronic Engine Control (EC) System wiring for proximity to ignition components or wires.
Is wiring too close to ignition components or wires?
Yes

- REROUTE as necessary.

No

- Engine compartment wire routing is OK. GO to QB3
.

QB3 CHECK KEEP ALIVE POWER (KAPWR) TO PCM

Note:Refer to the PCM connector pin numbers in the beginning of this pinpoint test.

- Disconnect PCM.

- Measure voltage between KAPWR circuit at the PCM harness connector and ground.

- While observing digital multimeter, grasp the Electronic EC harness and wiggle, shake or bend a small section while working from the PCM to the dash panel.
Does the voltage reading indicate less than 10.5 volts?
Yes

- ISOLATE and REPAIR open circuit.

No

- No open in KAPWR harness circuit detected. GO to QB4
.

QB4 CHECK FOR REPEAT OF DTC P0603/P1605/P1633

- Reconnect PCM.

- Start engine and allow it to reach operating temperature.

- Run Key On Engine Off Self-Test.

- Retrieve Continuous Memory DTCs.
Is DTC P0603, P1605 or P1633 present?
Yes

- REPLACE the PCM.

No

- REPAIR other DTCs as necessary. If none, testing is complete.

___________

Let me know if this helps.

JOe
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Saturday, December 29th, 2018 AT 7:16 PM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
Sounds like bad battery cables to me. Is the cable insulation melted at the terminals? If so, new battery cables are needed.
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Sunday, December 30th, 2018 AT 10:12 PM

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